当前期刊: The European Physical Journal A Go to current issue    加入关注   
显示样式:        排序: IF: - GO 导出
我的关注
我的收藏
您暂时未登录!
登录
  • Feasibility studies for the measurement of time-like proton electromagnetic form factors from $$\bar{p}p \rightarrow \mu ^+\mu ^-$$ p ¯ p → μ + μ - at $$\overline{\text {P}}\text {ANDA}$$ P ¯ ANDA at FAIR
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-15
    G. Barucca, F. Davì, G. Lancioni, P. Mengucci, L. Montalto, P. P. Natali, N. Paone, D. Rinaldi, L. Scalise, W. Erni, B. Krusche, M. Steinacher, N. Walford, N. Cao, Z. Liu, C. Liu, B. Liu, X. Shen, S. Sun, J. Tao, X. A. Xiong, G. Zhao, J. Zhao, M. Albrecht, W. Alkakhi, S. Bökelmann, S. Coen, F. Feldbauer, M. Fink, J. Frech, V. Freudenreich, M. Fritsch, J. Grochowski, R. Hagdorn, F. H. Heinsius, T. Held

    This paper reports on Monte Carlo simulation results for future measurements of the moduli of time-like proton electromagnetic form factors, \(|G_{E}|\) and \(|G_{M}|\), using the \(\bar{p} p \rightarrow \mu ^{+} \mu ^{-}\) reaction at \(\overline{\text {P}}\text {ANDA}\) (FAIR). The electromagnetic form factors are fundamental quantities parameterizing the electric and magnetic structure of hadrons

    更新日期:2021-01-15
  • Detailed study of the decay of $$^{32}$$ 32 Ar
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-14
    B. Blank, N. Adimi, M. Alcorta, A. Bey, M. J. G Borge, B. A. Brown, F. de Oliveira Santos, C. Dossat, H. O. U. Fynbo, J. Giovinazzo, H. H. Knudsen, M. Madurga, A. Magilligan, I. Matea, A. Perea, K. Sümmerer, O. Tengblad, J. C. Thomas

    In an experiment performed at the SPIRAL1 facility of GANIL, the \(\beta \) decay of \(^{32}\)Ar has been studied by means of the “Silicon Cube” device associated with germanium clover detectors from the EXOGAM array. Beta-delayed protons and \(\gamma \) rays have been observed and allowed the determination of all relevant decay branches. The Gamow–Teller strength distribution is compared to shell-model

    更新日期:2021-01-14
  • Resonances in $$^{12}{\mathrm C}$$ 12 C and $$^{24}\mathrm{Mg}$$ 24 Mg : what do we learn from a microscopic cluster theory?
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-14
    P. Descouvemont

    We discuss resonance properties in three-body systems, with examples on \(^{12}{\mathrm C}\) and \(^{24}\mathrm{Mg}\). We use a microscopic cluster model, where the generator coordinate is defined in the hyperspherical formalism. The \(^{12}{\mathrm C}\) nucleus is described by an \(\alpha +\alpha +\alpha \) structure, whereas \(^{24}\mathrm{Mg}\) is considered as an \(^{16}\mathrm{O}+\alpha +\alpha

    更新日期:2021-01-14
  • Ultraviolet suppression and nonlocality in optical model potentials for nucleon-nucleus scattering
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-14
    H. F. Arellano, G. Blanchon

    We investigate the role of high momentum components of optical model potentials for nucleon-nucleus scattering and its incidence on their nonlocal structure in coordinate space. The study covers closed-shell nuclei with mass number in the range \(4 \le A \le 208\), for nucleon energies from tens of MeV up to 1 GeV. To this purpose microscopic optical potentials were calculated using density-dependent

    更新日期:2021-01-14
  • P-wave two-particle bound and scattering states in a finite volume including QED
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-14
    Gianluca Stellin, Ulf-G. Meißner

    The mass shifts for two-fermion bound and scattering P-wave states subject to the long-range interactions due to QED in the non-relativistic regime are derived. Introducing a short range force coupling the spinless fermions to one unit of angular momentum in the framework of pionless EFT, we first calculate both perturbatively and non-perturbatively the Coulomb corrections to fermion–fermion scattering

    更新日期:2021-01-14
  • QED effects on the spin asymmetry in elastic $$^{12}$$ 12 C( $$e,e'$$ e , e ′ ) collisions
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-13
    D. H. Jakubassa-Amundsen

    The influence of quantum electrodynamic (QED) effects on the Sherman function S for the scattering of polarized electrons from a \(^{12}\)C nucleus is investigated. While vacuum polarization is treated to all orders via the Uehling potential, the vertex correction, self energy, soft bremsstrahlung and dispersion corrections are accounted for to lowest order within the plane-wave Born approximation

    更新日期:2021-01-13
  • Global descriptions and decay rates for continuum excitation of weakly bound nuclei
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-13
    A. Pakou, O. Sgouros, V. Soukeras, F. Cappuzzello

    In this work we will present an overview of our global studies on continuum excitations induced by protons, for the weakly bound nuclei \(^6\hbox {Li}\), \(^7\hbox {Li}\) and \(^9\hbox {Be}\), presenting strong clustering modes. Measurements are made in inverse kinematics and extensive simulations have been developed, to corroborate the analysis and interpretation of the results. The focus of the measurements

    更新日期:2021-01-13
  • Activation cross section data of deuteron induced nuclear reactions on rubidium up to 50 MeV
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-13
    Ferenc Tárkányi, Alex Hermanne, Ferenc Ditrói, Sándor Takács, Anatolij V. Ignatyuk, Ingo Spahn, Stephan Spellerberg

    Activation cross sections of the \(^{\mathrm {nat}}\hbox {Rb (d,xn)}^{87\mathrm {m,85m,85g,83,82}}\hbox {Sr}\), \(^{\mathrm {nat}}\hbox {Rb(d,x)}^{\mathrm {86,84,83,82m}}\hbox {Rb}\) and \(^{\mathrm {nat}}\hbox {Rb(d,x)}^{85\mathrm {m}}\hbox {Kr}\) nuclear reactions have been measured for the first time through an activation method combining the stacked foil irradiation technique and gamma-ray spectrometry

    更新日期:2021-01-13
  • Nuclear clusters as the first stepping stones for the chemical evolution of the universe
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-13
    Michael Wiescher, Ondrea Clarkson, Richard J. deBoer, Pavel Denisenkov

    It is a well-established fact that the generation of the heavy elements occurred in stars—the Cauldrons of the Cosmos—via multiple complex nuclear reaction processes during stellar life and death. This paper will address the question of the first step, the formation of heavier elements such as carbon and oxygen from the primordial elemental abundance distribution in first stars. This nucleosynthesis

    更新日期:2021-01-13
  • Strong decay analysis of excited nonstrange charmed mesons: implications for spectroscopy
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-13
    Keval Gandhi, Ajay Kumar Rai

    The strong decays of experimentally observed excited nonstrange charmed mesons are analyzed in the framework of heavy quark effective theory (HQET). The ratio of the strong decay rates identified the doublets \((D_1(2420), D_2^*(2460))\) as \((1^3P_1, 1^3P_2)\), \((D(2550), D_J^*(2600))\) as \((2^1S_0, 2^3S_1)\) and \((D(2740), D_J^*(2750))\) as \((1^3D_2, 1^3D_3)\). The \(D_J(3000)\) is interpreted

    更新日期:2021-01-13
  • The $$^3$$ 3 He+ $$^5$$ 5 He $$\rightarrow $$ → $$\alpha $$ α + $$\alpha $$ α reaction below the Coulomb barrier via the Trojan Horse Method
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-12
    C. Spitaleri, S. Typel, C. A. Bertulani, A. M. Mukhamedzhanov, T. Kajino, M. Lattuada, A. Cvetinović, S. Messina, G. L. Guardo, N. Soić, M. Milin, S. S. Perrotta, Chengbo Li, P. Čolović, G. D’Agata, D. Dell’Aquila, C. G. Fatuzzo, M. Gulino, S. Q. Hou, M. La Cognata, D. Lattuada, D. Nurkić, R. Popočovski, N. Skukan, S. Szilner, O. Trippella, M. Uroić, N. Vukman

    For the first time in an application to nuclear astrophysics, a process induced by the unstable \(^5\)He = (\(^4\)He-n) nucleus, the \(^3\)He+\(^5\)He\(\rightarrow \)2\(\alpha \) reaction, has been studied through the Trojan Horse Method (THM). For that purpose, the quasi-free (QF) contribution of the \(^9\)Be(\(^3\)He,\(\alpha \alpha \))\(^4\)He reaction was selected at \(E_{^{3}\text{ He }}=4\) MeV

    更新日期:2021-01-12
  • Dynamics of light hypernuclei in collisions of $$^{197}$$ 197 Au+ $$^{197}$$ 197 Au at GeV energies
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-11
    Zhao-Qing Feng

    The dynamics of light hypernuclei and nuclear clusters produced in \(^{197}\)Au+\(^{197}\)Au collisions has been investigated thoroughly with a microscopic transport model. All possible channels of hyperon production and transportation of hyperons in nuclear medium are implemented into the model. The light complex fragments are recognized with the Wigner density approach at the stage of freeze out

    更新日期:2021-01-12
  • Cross sections and isomer ratios in the Rb(n, $$\gamma $$ γ ) and Sr(n, $$\gamma $$ γ ) reactions
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-11
    K. S. Krane

    The neutron radiative capture cross sections have been measured for the stable isotopes of Rb (mass numbers 85, 87) and Sr (mass numbers 84, 86, 88) using the activation technique, by observing the \(\gamma \) rays emitted in the decays of the radionuclides produced in neutron irradiation. Values are reported for both the thermal cross sections and the resonance integrals. Internal consistency of the

    更新日期:2021-01-12
  • Lattice study of QCD at finite chiral density: topology and confinement
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-08
    Nikita Astrakhantsev, V. V. Braguta, A. Yu. Kotov, D. D. Kuznedelev, A. A. Nikolaev

    In this paper we study the properties of QCD at nonzero chiral density \(\rho _5\), which is introduced through chiral chemical potential \(\mu _5\). The study is performed within lattice simulation of QCD with dynamical rooted staggered fermions. We first check that \(\rho _5\) is generated at nonzero \(\mu _5\) and in the chiral limit observe \(\rho _5 \sim \varLambda _{QCD}^2 \mu _5\). We also test

    更新日期:2021-01-08
  • Cluster effective field theory and nuclear reactions
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-08
    Shung-Ichi Ando

    An effective field theory (EFT) for a nuclear reaction at low energies is studied. The astrophysical S-factor of radiative \(\alpha \) capture on \(^{12}\hbox {C}\) at the Gamow-peak energy, \(T_\mathrm{G} = 0.3\) MeV, is a fundamental quantity in nuclear astrophysics, and we construct an EFT for the reaction. To fix parameters appearing in the effective Lagrangian, the EFT is applied to the study

    更新日期:2021-01-08
  • Unified description of the coupled-channels and statistical Hauser-Feshbach nuclear reaction theories for low energy neutron incident reactions
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-08
    Toshihiko Kawano

    We incorporate the coupled-channels optical model into the statistical Hauser-Feshbach nuclear reaction theory, where the scattering matrix is diagonalized by performing the Engelbrecht-Weidenmüller transformation. This technique has been implemented in the coupled-channels optical model code ECIS by J. Raynal, and we extend this method so that all the open channels in a nucleon-induced reaction on

    更新日期:2021-01-08
  • Alpha condensate and dynamics of cluster formation
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-07
    Yasuro Funaki

    The picture of alpha condensation is extended to a general concept of nonlocalized clustering, which is the so-called container picture and is applicable to promisingly all the cluster structures. The extended version of the so-called THSR wave function demonstrates the competition between the localized and nonlocalized cluster motions and then leads to the concept of the container, which plays a role

    更新日期:2021-01-08
  • Diving into Raynal’s DWBA code
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-07
    G. Blanchon, M. Dupuis, H. F. Arellano, R. N. Bernard, B. Morillon, P. Romain

    The study of nucleon-nucleus elastic scattering for spherical targets amounts to solving Schrödinger equation with a given optical potential. This potential can be obtained microscopically by taking as a starting point the interaction between two nucleons. It can also be obtained in a phenomenological way by postulating the geometry of potential and fitting parameters to reproduce experimental data

    更新日期:2021-01-08
  • Semi-classical approaches to heavy-ion reactions: fusion, rainbow, and glory
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-07
    L. F. Canto, K. Hagino, M. Ueda

    A semi-classical approximation has been a powerful tool in understanding the dynamics of low-energy heavy-ion reactions. Here we discuss two topics in this regard, for which Mahir Hussein was a world leading pioneer. The first topic is heavy-ion fusion reactions of neutron-rich nuclei, in which the breakup process of the projectile nucleus plays a crucial role. The second is rainbow and glory scattering

    更新日期:2021-01-07
  • Structure of the quartetting ground state of $$N=Z$$ N = Z nuclei
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-07
    A. G. Serban, D. R. Nichita, D. Negrea, V. V. Baran

    The formal equivalence between the quartetting picture and the symmetry restored BCS picture is established for the ground state correlations induced by the general isovector-isoscalar pairing interaction. Multiple ground state structures compatible with the particle number and isospin symmetries are evaluated. The competition of isovector and isoscalar correlations is discussed for the \(N=Z\) nuclei

    更新日期:2021-01-07
  • Mechanism of the $$^{144}$$ 144 Sm( $$^7$$ 7 Li, $$^6$$ 6 Li $$^*_{3+}$$ 3 + ∗ ) $$^{145}$$ 145 Sm reaction at 30 MeV
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-06
    K. Rusek, M. Mazzocco, N. Keeley, K. W. Kemper

    In a recent experiment investigating the origin of the \(\alpha \) particle yield in the \(^7\)Li + \(^{144}\) Sm system the measured \(\alpha + d\) coincidences at a bombarding energy of 30 MeV were shown to arise from decay of the 2.186-MeV \(3^+\) resonance of \(^6\)Li. In this work we demonstrate that the laboratory frame \(\alpha \) particle angular distribution extracted from these data can be

    更新日期:2021-01-06
  • Studying multi-nucleon transfer reaction in a recoil mass spectrometer
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-06
    Rohan Biswas, Sunil Kalkal, S. Nath

    We present simulation of a recoil mass spectrometer for measurement of multi-nucleon transfer reactions, based on Monte Carlo techniques. Target-like ions are generated event by event and transported to the focal plane of the spectrometer by the method of transfer matrices. Measured focal plane spectra for the elastic and six transfer channels of the reaction \(^{28}\)Si+\(^{94}\)Zr are reproduced

    更新日期:2021-01-06
  • Nuclear resonance fluorescence of $$^{208}$$ 208 Pb in heavy-ion colliders
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-05
    Uliana Dmitrieva, Igor Pshenichnov

    In ultraperipheral collisions (UPC) of nuclei the impact of Lorentz-contracted electromagnetic fields of collision partners leads to their excitations. In case of heavy nuclei the emission of neutrons is a main deexcitation channel and forward neutrons emitted in UPC were detected at the Relativistic Heavy-Ion Collider (RHIC) and at the Large Hadron Collider (LHC) by means of Zero Degree Calorimeters

    更新日期:2021-01-05
  • Elastic $$\alpha $$ α transfer in the $$^{16}\hbox {O}+^{12}\hbox {\!\!C}$$ 16 O + 12 C scattering and its impact on the nuclear rainbow
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-05
    Nguyen Hoang Phuc, Dao T. Khoa, Nguyen Tri Toan Phuc

    Elastic \(^{16}\hbox {O}+^{12}\hbox {\!\!C}\) scattering is known to exhibit the nuclear rainbow pattern at incident energies \(E_\text {lab} > rsim 200\) MeV, with the Airy structure of the far-side scattering cross section clearly seen at medium and large angles. Such a rainbow pattern is well described by the deep real optical potential (OP) given by the double-folding model (DFM). At lower energies

    更新日期:2021-01-05
  • Measurement of the relative differential cross sections of the $$^{1} H(n,el)$$ 1 H ( n , e l ) reaction in the neutron energy range from 6 MeV to 52 MeV
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-03
    Haoyu Jiang, Wei Jiang, Zengqi Cui, Guohui Zhang, Ruirui Fan, Kang Sun, Huaiyong Bai, Yiwei Hu, Jie Liu, Han Yi, Changjun Ning, Liang Zhou, Zhijia Sun, Jingyu Tang, Qi An, Jie Bao, Yu Bao, Ping Cao, Haolei Chen, Qiping Chen, Yonghao Chen, Yukai Chen, Zhen Chen, Changqing Feng, Keqing Gao, Minhao Gu, Changcai Han, Zijie Han, Guozhu He, Yongcheng He, Yang Hong, Hanxiong Huang, Weiling Huang, Xiru Huang

    The relative differential cross sections of the \(^{1}\hbox {H}(n, \,el)\) reaction have been measured at the China Spallation Neutron Source (CSNS) Back-n white neutron source. A low-density polyethylene sample and a graphite foil were prepared for the foreground and background measurements, respectively. The charged particles were detected using the \({\vartriangle }E-E\) telescope array of the Light-charged

    更新日期:2021-01-03
  • Correspondence of multiplicity and energy distributions
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-02
    Maciej Rybczyński, Zbigniew Włodarczyk

    The evaluation of the number of ways we can distribute energy among a collection of particles in a system is important in many branches of modern science. In particular, in multiparticle production processes the measurements of particle yields and kinematic distributions are essential for characterizing their global properties and to develop an understanding of the mechanism for particle production

    更新日期:2021-01-02
  • Higgs modulation of emergent mass as revealed in kaon and pion parton distributions
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-02
    Z.-F. Cui, M. Ding, F. Gao, K. Raya, D. Binosi, L. Chang, C. D. Roberts, J. Rodríguez-Quintero, S. M. Schmidt

    Strangeness was discovered roughly seventy years ago, lodged in a particle now known as the kaon, K. Kindred to the pion, \(\pi \); both states are massless in the absence of Higgs-boson couplings. Kaons and pions are Nature’s most fundamental Nambu–Goldstone modes. Their properties are largely determined by the mechanisms responsible for emergent mass in the standard model, but modulations applied

    更新日期:2021-01-02
  • Discovery of a new low energy neutron resonance of $$^{89}$$ 89 Y
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-02
    Tatsuya Katabuchi, Yosuke Toh, Motoharu Mizumoto, Tatsuhiro Saito, Kazushi Terada, Atsushi Kimura, Shoji Nakamura, Huang Minghui, Gerard Rovira, Masayuki Igashira

    A new neutron resonance of \(^{89}\)Y was discovered by time-of-flight (TOF) neutron capture experiments using a pulsed neutron beam from a spallation neutron source of the Japan Proton Accelerator Research Complex. The observed resonance energy was 19.7 eV that is much lower than the lowest energy (2.60 keV) of the previous reported resonances. In addition to the TOF measurement, nuclide identification

    更新日期:2021-01-02
  • Unexpected transitional paths in the prolate to oblate shape phase transitions for Bose–Fermi systems
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-01
    M. Böyükata, C. E. Alonso, J. M. Arias, L. Fortunato, A. Vitturi

    The quantum shape phase transitions in odd-even nuclei are investigated within the intrinsic frame approach to the interacting boson-fermion model. In this work, the case of a single-j fermion coupled to a bosonic core that performs a transition from prolate to oblate shapes is considered. The focus is on the effect of the coupled fermion on the whole system along the transitional path from prolate

    更新日期:2021-01-02
  • Neutron radiative capture cross section for sodium with covariance analysis
    Eur. Phys. J. A (IF 2.176) Pub Date : 2021-01-01
    A. Gandhi, Aman Sharma, Rebecca Pachuau, B. Lalremruata, Mayur Mehta, Prashant N. Patil, S. V. Suryanarayana, L. S. Danu, B. K. Nayak, A. Kumar

    The neutron radiative capture cross sections measurement has been carried out for the \(^{23}\)Na nucleus in the neutron energy region from 0.6 to 3.2 MeV using the neutron activation technique followed by off-line \(\gamma \)-ray spectrometry. The measurement was made relative to the \(^{115}\)In(n,n\(\prime \) \(\gamma \))\(^{115}\hbox {In}^{m}\) reference monitor reaction cross section. The neutrons

    更新日期:2021-01-01
  • Jacobi no-core shell model for p -shell hypernuclei
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-12-16
    Hoai Le, Johann Haidenbauer, Ulf-G. Meißner, Andreas Nogga

    We extend the recently developed Jacobi no-core shell model to hypernuclei. Based on the coefficients of fractional parentage for ordinary nuclei, we define a basis where the hyperon is the spectator particle. We then formulate transition coefficients to states that single out a hyperon–nucleon pair which allow us to implement a hypernuclear many-baryon Hamiltonian for p-shell hypernuclei. As a first

    更新日期:2020-12-16
  • Study of cluster structures in nuclei through the ratio method
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-12-15
    Pierre Capel, Ronald C. Johnson, Filomena M. Nunes

    For one-neutron halo nuclei, the cross sections for elastic scattering and breakup at intermediate energy exhibit similar angular dependences. The Recoil Excitation and Breakup (REB) model of reactions elegantly explains this feature. It also leads to the idea of a new reaction observable to study the structure of loosely-bound nuclear systems: the Ratio. This observable consists of the ratio of angular

    更新日期:2020-12-15
  • A new radioactive decay mode, true ternary fission, the decay of heavy nuclei into three comparable fragments
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-12-07
    W. von Oertzen, A. K. Nasirov

    The ternary cluster decay of heavy nuclei has been observed in several experiments with binary coincidences between two fragments using detector telescopes (the FOBOS-detectors) with very large solid angles and placed on the opposite sides from the source of fissioning nuclei. The binary coincidences at a relative angle of \(180^{\circ }\) correspond to binary fission or to the decay into three cluster

    更新日期:2020-12-07
  • Microscopic calculations for Be isotopes within real-time evolution method
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-30
    Bo Zhou, Masaaki Kimura, Qing Zhao, Seung-heon Shin

    The Be isotopes with \(\alpha \) + \(\alpha \) + valence neutrons clustering structure are studied within the Real-time Evolution Method (REM). By solving the equation-of-motion (EOM) of the Gaussian wave packets involving the complex spatial coordinates and spin variables, various molecular configurations are obtained and then are superposed in the Generator Coordinate Method (GCM). The obtained energy

    更新日期:2020-12-01
  • Total kinetic energy and mass yields from the fast neutron-induced fission of $$^{239}\hbox {Pu}$$ 239 Pu
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-26
    Alexander Chemey, Ashley Pica, Liangyu Yao, Walter Loveland, Hye Young Lee, S. A. Kuvin

    The total kinetic energy (TKE) release in fission is an important observable, constituting over 80% of the energy released in fission (\(\hbox {E}_{f} \approx 200~\hbox {MeV}\)). While the TKE release in the \(^{239}\hbox {Pu}\)(n,f) reaction was previously measured up to 50 MeV incident neutron energy (\(\hbox {E}_{n}\)), there were features in TKE release at the highest values of \(\hbox {E}_{n}\)

    更新日期:2020-11-27
  • Light clusters in warm stellar matter: calibrating the cluster couplings
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-23
    Tiago Custódio, Alexandre Falcão, Helena Pais, Constança Providência, Francesca Gulminelli, Gerd Röpke

    The abundances of light clusters within a formalism that considers in-medium effects are calculated using several relativistic mean-field models, with both density-dependent and density-independent couplings. Clusters are introduced as new quasiparticles, with a modified coupling to the scalar meson field. A comparison with experimental data from heavy ion collisions allows settling the model dependence

    更新日期:2020-11-23
  • Some properties of Wigner 3 j coefficients: non-trivial zeros and connections to hypergeometric functions
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-23
    Jean-Christophe Pain

    The contribution of Jacques Raynal to angular-momentum theory is highly valuable. In the present article, I intend to recall the main aspects of his work related to Wigner 3j symbols. It is well known that the latter can be expressed with a hypergeometric series. The polynomial zeros of the 3j coefficients were initially characterized by the number of terms of the series minus one, which is the degree

    更新日期:2020-11-23
  • Open-charm Euclidean correlators within heavy-meson EFT interactions
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-20
    Glòria Montaña, Olaf Kaczmarek, Laura Tolos, Àngels Ramos

    The open-charm Euclidean correlators have been computed for the first time using the thermal spectral functions extracted from a finite-temperature self-consistent unitarized approach based on a chiral effective field theory that implements heavy-quark spin symmetry. The inclusion of the full-energy dependent open-charm spectral functions in the calculation of the Euclidean correlators leads to a similar

    更新日期:2020-11-21
  • Second virial coefficients of light nuclear clusters and their chemical freeze-out in nuclear collisions
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-20
    K. A. Bugaev, O. V. Vitiuk, B. E. Grinyuk, V. V. Sagun, N. S. Yakovenko, O. I. Ivanytskyi, G. M. Zinovjev, D. B. Blaschke, E. G. Nikonov, L. V. Bravina, E. E. Zabrodin, S. Kabana, S. V. Kuleshov, G. R. Farrar, E. S. Zherebtsova, A. V. Taranenko

    Here we develop a new strategy to analyze the chemical freeze-out of light (anti)nuclei produced in high energy collisions of heavy atomic nuclei within an advanced version of the hadron resonance gas model. It is based on two different, but complementary approaches to model the hard-core repulsion between the light nuclei and hadrons. The first approach is based on an approximate treatment of the

    更新日期:2020-11-21
  • Baryonic sources of thermal photons
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-20
    Nathan P. M. Holt, Ralf Rapp

    Thermal radiation of photons and dileptons from hadronic matter plays an essential role in understanding electromagnetic emission spectra in high-energy heavy-ion collisions. In particular, baryons and anti-baryons have been found to be strong catalysts for electromagnetic radiation, even at collider energies where the baryon chemical potential is small. Here, we conduct a systematic analysis of \(\pi

    更新日期:2020-11-21
  • Lifetimes of core-excited states in semi-magic $$^{95}\mathrm {Rh}$$ 95 Rh
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-17
    A. Ertoprak, C. Qi, B. Cederwall, M. Doncel, U. Jakobsson, B. M. Nyakó, G. Jaworski, P. Davies, G. de France, I. Kuti, D. R. Napoli, R. Wadsworth, S. S. Ghugre, R. Raut, B. Akkus, H. Al Azri, A. Algora, G. de Angelis, A. Atac, T. Bäck, A. Boso, E. Clément, D. M. Debenham, Zs. Dombrádi, S. Ertürk, A. Gadea, F. Ghazi Moradi, A. Gottardo, T. Hüyük, E. Ideguchi, H. Li, C. Michelagnoli, V. Modamio, J. Nyberg

    Lifetimes of negative-parity states have been determined in the neutron deficient semi-magic (N = 50) nucleus \(^{95}\mathrm {Rh}\). The fusion-evaporation reaction \(^{58}Ni(^{40}Ca, 3p)\) was used to populate high-spin states in \(^{95}\mathrm {Rh}\) at the Grand Accélérateur National d’Ions Lourds (GANIL) accelerator facility. The results were obtained using the Doppler Shift Attenuation Method

    更新日期:2020-11-17
  • Signature of a possible $$\alpha $$ α -cluster state in $$N=Z$$ N = Z doubly-magic $$^{56}$$ 56 Ni
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-12
    S. Bagchi, H. Akimune, J. Gibelin, M. N. Harakeh, N. Kalantar-Nayestanaki, N. L. Achouri, B. Bastin, K. Boretzky, H. Bouzomita, M. Caamaño, L. Càceres, S. Damoy, F. Delaunay, B. Fernández-Domínguez, M. Fujiwara, U. Garg, G. F. Grinyer, O. Kamalou, E. Khan, A. Krasznahorkay, G. Lhoutellier, J. F. Libin, S. Lukyanov, K. Mazurek, M. A. Najafi, J. Pancin, Y. Penionzhkevich, L. Perrot, R. Raabe, C. Rigollet

    An inelastic \(\alpha \)-scattering experiment on the unstable \(N=Z\), doubly-magic \(^{56}\)Ni nucleus was performed in inverse kinematics at an incident energy of 50 A.MeV at GANIL. High multiplicity for \(\alpha \)-particle emission was observed within the limited phase-space of the experimental setup. This observation cannot be explained by means of the statistical-decay model. The ideal classical

    更新日期:2020-11-12
  • g factor of the $$12^+$$ 12 + K -isomer in $$^{174}$$ 174 W
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-11
    M. Rocchini, A. Nannini, G. Benzoni, E. Vigezzi, B. Melon, P. R. John, S. Bottoni, S. Ceruti, R. Avigo, P. Sona, C. A. Ur, D. Bazzacco, N. Blasi, G. Bocchi, A. Bracco, F. Camera, S. Capra, F. C. L. Crespi, E. R. Gamba, G. Georgiev, A. Giaz, A. Gottardo, S. Leoni, R. Menegazzo, D. Mengoni, C. Michelagnoli, B. Million, V. Modamio, A. I. Morales, D. R. Napoli, M. Ottanelli, L. Pellegri, A. Perego, J.

    The g factor of the \(12^+\) K-isomer in \(^{174}\)W has been measured by means of the time-differential perturbed angular distribution technique as \(g(12^+)=+0.304(11)\). In addition, the half-life of the isomer has been remeasured as \(T_{1/2}(12^+)=124(8)\) ns, in agreement with the literature value and confirming the anomalous hindrance F of the E2 transition to the \(10^+\) level of the ground

    更新日期:2020-11-12
  • Study of bottom and charmed baryons in quark-diquark model
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-09
    S. Mohammad Moosavi Nejad, A. Armat

    In this work, we study the properties of charm- and bottom-flavored baryons in the approximative quark-diquark modelin which the structure of baryons is considered as the bound states of quark-diquark pairs instead of the usual three equivalent quarks. To this aim, we use the Bethe-Salpeter equation including the Yukawa potential between the constituent quarks of baryons. Performing a fit procedure

    更新日期:2020-11-09
  • QCD challenges from pp to A–A collisions
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-09
    J. Adolfsson, A. Andronic, C. Bierlich, P. Bozek, S. Chakraborty, P. Christiansen, D. D. Chinellato, R. J. Fries, G. Gustafson, H. van Hees, P. M. Jacobs, D. J. Kim, L. Lönnblad, M. Mace, O. Matonoha, A. Mazeliauskas, A. Morsch, A. Nassirpour, A. Ohlson, A. Ortiz, A. Oskarsson, I. Otterlund, G. Paić, D. V. Perepelitsa, C. Plumberg, R. Preghenella, R. Rapp, C. O. Rasmussen, A. Rossi, O. V. Rueda, A

    This paper is a write-up of the ideas that were presented, developed and discussed at the third International Workshop on QCD Challenges from pp to A–A, which took place in August 2019 in Lund, Sweden (Workshop link: https://indico.lucas.lu.se/event/1214/). The goal of the workshop was to focus on some of the open questions in the field and try to come up with concrete suggestions for how to make progress

    更新日期:2020-11-09
  • $${}^{5}$$ 5 He( $${}^{3}$$ 3 He, $${}^{4}$$ 4 He) $${}^{4}$$ 4 He as a three-body reaction via a continuum resonance in the n+ $${}^{4}$$ 4 He system
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-06
    Stefan Typel

    The \({}^{5}\)He(\({}^{3}\)He,\({}^{4}\)He)\({}^{4}\)He reaction involving the unstable \({}^{5}\)He nucleus is a possible process in primordial nucleosynthesis to convert \({}^{3}\)He into \({}^{4}\)He in a neutron transfer reaction. Since experimental data for the reaction cross section are not available, a theoretical prediction is needed to estimate the relevance of this process in comparison to

    更新日期:2020-11-06
  • Global trends of nuclear $$d_{5/2}^{2,3,4}$$ d 5 / 2 2 , 3 , 4 configurations
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-06
    M. Wiedeking, A. O. Macchiavelli

    With new experimental information on nuclei far from stability being available, a systematic investigation of excitation energies and electromagnetic properties along the \(N=10, 11, 12\) isotones and \(Z=10, 11, 12\) isotopes is presented. The experimental data are discussed in the context of the appearance and disappearance of shell closures at \(N=Z=8,14,16,20\), and compared to an effective-interaction

    更新日期:2020-11-06
  • Charge exchange (p,n) reaction to isobaric analogue states of select nuclei
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-06
    K. Amos, S. Karataglidis, W. A. Richter

    Using a modified version of Jacques Raynal’s program, DWBA98, we have analyzed cross-section data from a select set of charge exchange (p, n) reactions leading to isobaric analogue states of the target ground states. The Melbourne g-matrix model of the NN interaction has been used to specify both the relevant optical model potentials and the transition interactions. The formulation used defines transition

    更新日期:2020-11-06
  • Intricate partial waves in nuclear scattering
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-05
    Heinrich Viktor von Geramb

    This article is meant as an encomium of the life-span endeavor of Jacques Raynal to relate nuclear scattering density matrices with numerical methods. The mathematical investigations he made involved intricate hypergeometric coupling algebras and transformations. He was among the first to appreciate the general importance of these studies. His efforts over 60 years are most praiseworthy and, for them

    更新日期:2020-11-06
  • Clusters and their fundamental role for Trojan Horse Method
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-05
    R. G. Pizzone, C. A. Bertulani, L. Lamia, M. La Cognata, M. L. Sergi, R. Spartá, A. Tumino

    The Trojan Horse Method (THM) lays its foundations on the cluster structure of light nuclei which are usually used as “Trojan horses”. Many of them were successfully employed in the last decades to shed light to numerous astrophysical problems. Cluster structure and dynamics also suggest a series of tests which may be performed in order to strengthen the basis of the method. Among them pole invariance

    更新日期:2020-11-06
  • The hot GDR revisited
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-04
    Domenico Santonocito, Yorick Blumenfeld

    The properties of the Isovector Giant Dipole Resonance are reviewed as a function of the temperature of the state on which it is built. The experimental methods, based on scintillation detectors efficient for the detection of high energy gamma-rays, are described. Methods for determining the excitation energy and temperature from the measurement of light charged particle energy spectra taking pre-equilibrium

    更新日期:2020-11-04
  • The total reaction cross section of heavy-ion reactions induced by stable and unstable exotic beams: the low-energy regime
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-04
    L. F. Canto, V. Guimarães, J. Lubián, M. S. Hussein

    In this review paper we present a detailed account of the extraction and the calculation of the total reaction cross section of strongly bound and weakly bound, stable and unstable, exotic, nuclei. We discuss the optical model and the more general coupled channels model of direct reactions, and how from fits to the data on elastic scattering supplies the elastic element of (partial wave) S-matrix and

    更新日期:2020-11-04
  • Selected highlights of the production of light (anti-)(hyper-)nuclei in ultra-relativistic heavy-ion collisions
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-04
    Benjamin Dönigus

    The production of light (anti-)nuclei and (anti-)hypernuclei in ultra-relativistic heavy-ion collisions, but also in more elementary collisions as proton–proton and proton–nucleus collisions, became recently a focus of interest. In particular, the fact that these objects are all loosely bound compared to the temperature and energies, e.g. the kinetic energies involved, is often stressed out to be special

    更新日期:2020-11-04
  • Heavy vector and axial-vector D mesons in hot magnetized asymmetric nuclear matter
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-04
    Rajesh Kumar, Rahul Chhabra, Arvind Kumar

    We observed the impact of the finite magnetic field on the in-medium mass and decay constant of isospin averaged vector \(D^*(D^{*^+},D^{*^0})\) and axial-vector \(D_1(D^+_1, D^0_1)\) mesons. The quark and gluon condensates of the nuclear medium at the finite magnetic field, temperature, isospin asymmetry, and density have been obtained by the meson exchange scalar fields within the chiral SU(3) model

    更新日期:2020-11-04
  • The $$^{229}$$ 229 Th isomer: prospects for a nuclear optical clock
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-11-02
    Lars von der Wense, Benedict Seiferle

    The proposal for the development of a nuclear optical clock has triggered a multitude of experimental and theoretical studies. In particular the prediction of an unprecedented systematic frequency uncertainty of about \(10^{-19}\) has rendered a nuclear clock an interesting tool for many applications, potentially even for a re-definition of the second. The focus of the corresponding research is a nuclear

    更新日期:2020-11-02
  • Simulations using the pulse shape comparison scanning technique on an AGATA segmented HPGe gamma-ray detector
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-10-29
    B. De Canditiis, G. Duchêne

    Monte Carlo simulations are used to test the Pulse Shape Comparison Scanning (PSCS) technique implemented at the IPHC scanning table. The technique allows the full volume characterization of a given position sensitive detector resulting in the construction of the corresponding database of pulses. The tests, performed on a high purity germanium (HPGe) detector unit of the AGATA array, aim to quantify

    更新日期:2020-10-30
  • Erratum to: Covariant tensor formalism for partial-wave analyses of $$\psi $$ ψ decays into $$\gamma B{\bar{B}}$$ γ B B ¯ , $$\gamma \gamma V$$ γ γ V and $$\psi (2S)\rightarrow \gamma \chi _{c0,1,2}$$ ψ ( 2 S ) → γ χ c 0 , 1 , 2 with $$\chi _{c0,1,2}\rightarrow K{\bar{K}} \pi ^+\pi ^- $$ χ c 0 , 1 , 2 → K K ¯ π + π - and $$2\pi ^+2\pi ^-$$ 2 π + 2 π -
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-10-29
    Sayipjamal Dulat, Bing-Song Zou

    In the section 4 of our original paper, Eur. Phys. J. A 26, 125-134 (2005), for the PWA formulae of, we labelled the two photons as one from the first step and another one from the second step as distinguishable.

    更新日期:2020-10-30
  • Deuteron and antideuteron coalescence in heavy-ion collisions: energy dependence of the formation geometry
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-10-27
    Apiwit Kittiratpattana, Michael F. Wondrak, Medina Hamzic, Marcus Bleicher, Christoph Herold, Ayut Limphirat

    We investigate the collision energy dependence of deuteron and antideuteron emission in the RHIC-BES low- to mid-energy range \(\sqrt{s_{NN}}\) = 4.6–200 GeV where the formation rate of antinuclei compared to nuclei is strongly suppressed. In the coalescence picture, this can be understood as bulk emission for nuclei in contrast to surface emission for antinuclei. By comparison with experimental data

    更新日期:2020-10-30
  • Symmetry reduction of tensor networks in many-body theory
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-10-26
    A. Tichai, R. Wirth, J. Ripoche, T. Duguet

    The ongoing progress in (nuclear) many-body theory is accompanied by an ever-rising increase in complexity of the underlying formalisms used to solve the stationary Schrödinger equation. The associated working equations at play in state-of-the-art ab initio nuclear many-body methods can be analytically reduced with respect to angular-momentum, i.e. SU(2), quantum numbers whenever they are effectively

    更新日期:2020-10-30
  • Systematic study of proton radioactivity of spherical proton emitters with Skyrme interactions
    Eur. Phys. J. A (IF 2.176) Pub Date : 2020-10-26
    Jun-Hao Cheng, Xiao Pan, You-Tian Zou, Xiao-Hua Li, Zhen Zhang, Peng-Cheng Chu

    Proton radioactivity is an important and common process of the natural radioactivity of proton-rich nuclei. In our previous work (Cheng et al. in Nucl Rhys A 997: 121717, 2020), we systematically studied the proton radioactivity half-lives of \(53\le Z \le 83\) nuclei within the two-potential approach with Skyrme–Hartree–Fock. The calculations can well reproduce the experimental data of spherical nuclei

    更新日期:2020-10-30
Contents have been reproduced by permission of the publishers.
导出
全部期刊列表>>
微生物研究
亚洲大洋洲地球科学
NPJ欢迎投稿
自然科研论文编辑
ERIS期刊投稿
欢迎阅读创刊号
自然职场,为您触达千万科研人才
spring&清华大学出版社
城市可持续发展前沿研究专辑
Springer 纳米技术权威期刊征稿
全球视野覆盖
施普林格·自然新
chemistry
物理学研究前沿热点精选期刊推荐
自然职位线上招聘会
欢迎报名注册2020量子在线大会
化学领域亟待解决的问题
材料学研究精选新
GIANT
ACS ES&T Engineering
ACS ES&T Water
屿渡论文,编辑服务
阿拉丁试剂right
上海中医药大学
清华大学
复旦大学
南科大
北京理工大学
上海交通大学
隐藏1h前已浏览文章
课题组网站
新版X-MOL期刊搜索和高级搜索功能介绍
ACS材料视界
清华大学-1
武汉大学
浙江大学
天合科研
x-mol收录
试剂库存
down
wechat
bug