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Momentum transport of chiral modes in a thermal QCD medium Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-03-19 Pushpa Panday, Binoy Krishna Patra
We investigate the effect of a weak magnetic field on momentum transport in a thermal QCD medium at finite quark chemical potential using a semiclassical kinetic theory. In the presence of a magnetic field, the momentum transport coefficients acquire a tensor structure, reflected by the five shear (η0,η1,η2,η3 and η4) and two bulk viscous components (ζ0 and ζ1). The weak magnetic field removes the
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Pseudospin symmetry in resonant states in deformed nucleus 154Dy Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-03-16 Xin-Xing Shi, Zhen-Yu Zheng
It is known that pseudospin symmetry plays a crucial role in formation of many physical phenomena. By combining the relativistic mean field theory with the complex momentum representation method, the pseudospin symmetry in the single particle resonant states in the deformed nucleus 154Dy is investigated through the energy and width splittings, the quadrupole deformation parameter, the radial density
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An empirical formula for the half-lives of one- and two-proton radioactivity Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-03-15 N. P. Saeed Abdulla, M. K. Preethi Rajan, R. K. Biju
We have proposed an empirical formula for one- and two-proton decays, including the angular momentum term. While investigating the first term in the Viola–Seaborg formula, we found a linear relationship between the logarithmic half-life and the expression (aZ+b)Q−1/2 for each angular momentum state. Furthermore, we obtained a linear relationship between the slope and intercept as functions of the angular
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A fractional approach to cluster radioactivity Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-03-15 Ezgi Yörük, Abdullah Engin Çalık, Kazım Gökhan Atman, Hüseyin Şirin
The cluster radioactivity of 222,224,226Ra, 223,225Ac, 232,234,235,236U, 236,238Pu, 234,236U, 232,233,234,235,236U and 230,232Th isotopes which emitted 14C, 24Ne, 28Mg, 26Ne, 28Mg, 24Ne, respectively, has been analyzed with the help of fractional calculus for investigating the connection between order of the fractional derivative and nuclear structure. When the neutron number of daughter nuclei is
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Cross-sections for nuclear transmutation of long-lived fission product 126Sn using (p,n) reaction Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-03-09 K. Churi, P. Singh, S. Hinge, M. Hemalatha
For a sustainable nuclear energy program using fission reactors, the reduction or elimination of long-lived radioactive waste is essential. The hazardous Long-Lived Fission Products (LLFP), which are by-products of the operation of nuclear reactors, need to be converted to short-lived or stable nuclei. For nuclear transmutation, the knowledge of reaction cross-sections is important. The cross-section
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Entropy and multifractality in ring-like and jet-like events produced in 11.6 A GeV/c 197Au-AgBr collisions Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-02-24 Bushra Ali, Sweta Singh, Anuj Chandra, Shakeel Ahmad
Physical quantities, such as entropy, dimensions and multifractal characteristics of multiplicity distributions of charged particles produced in 197Au–AgBr collisions, are examined and the findings are compared with the predictions of Monte Carlo model Ultra-Relativistic Quantum Molecular Dynamics (URQMD) and Heavy Ion Jet INteraction Generator (HIJING) and also with the results reported earlier in
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Comparative study for the elastic scattering of the isobar nuclei 6Li and 6He on 64Zn using different nuclear potentials Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-02-19 A. Amar
The available experimental data for the elastic scattering of the isobar nuclei 6Li and 6He on 64Zn have been reanalyzed in the available energy range using the optical model, double folding (DF) (Sao Paulo), and crystal model (CM). Double-folding (DF) and crystal model (CM) have been used to investigate the experimental data as a real part of the optical potential, while the imaginary part was taken
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Fraction constraint in partial wave analysis Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-02-03 Xiang Dong, Chu-Cheng Pan, Yu-Chang Sun, Ao-Yan Cheng, Ao-Bo Wang, Hao Cai, Kai Zhu
To resolve the nonconvex optimization problem in partial wave analysis, this paper introduces a novel approach that incorporates fraction constraints into the likelihood function. This method offers significant improvements in the efficiency of pole searching within partial wave analysis.
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Properties of the 7He ground state studied by the 6He(d,p)7He reaction Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-02-03 A. A. Bezbakh, M. S. Golovkov, A. S. Denikin, R. Wolski, S. G. Belogurov, D. Biare, V. Chudoba, A. S. Fomichev, E. M. Gazeeva, A. V. Gorshkov, G. Kaminski, B. R. Khamidullin, M. Khirk, S. A. Krupko, B. Mauyey, I. A. Muzalevskii, W. Piatek, A. M. Quynh, S. I. Sidorchuk, R. S. Slepnev, A. Swiercz, G. M. Ter-Akopian, B. Zalewski
The 7He nucleus was studied using the 6He(d,p)7He reaction in inverse kinematics at 29 A⋅MeV 6He beam delivered by the ACCULINNA-2 fragment separator (FLNR, JINR). The registration of neutrons from 7He→n+6He decay made it possible to derive the 7He ground state parameters, the decay energy of 0.38(2)MeV and width of 0.11(3)MeV.
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Initial vorticities of quark–gluon matter in heavy-ion collisions Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-01-29 Anke Lei, Dujuan Wang, Dai-Mei Zhou, Ben-Hao Sa, Laszlo Pal Csernai, Larissa V. Bravina
We calculate four types of initial vorticities in Au+Au collisions at energies SNN=5–200GeV using a microscopic transport model PACIAE. Our simulation shows the nonmonotonic dependence of the initial vorticities on the collision energies. The energy turning point is around 10–15GeV for different vorticities but not sensitive to impact parameter.
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A study of decay chains of radioactive actinium isotopes Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-01-18 P. S. Damodara Gupta, N. Sowmya, H. C. Manjunatha, H. S. Anushree, L. Seenappa, K. N. Sridhar
In this paper, we systematically studied half-lives of the different decay modes using various theoretical models such as the unified fission model (UFM) and the effective liquid drop model. Beta-decay half-lives were evaluated using semi-empirical formulae available in the literature. We compared half-lives of all the studied decay modes and identified shorter half-lives among the same in 205−233Ac
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Squeezed spectra and elliptic flow of bosons and anti-bosons with in-medium mass splitting Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-01-12 Yong Zhang, Shi-Yao Wang, Peng Ru, Wei-Hua Wu
We study the impact of the in-medium mass splitting between bosons and anti-bosons on their spectra and elliptic flow. The in-medium mass splitting may cause a separation in the transverse momentum spectra, as well as a division in the elliptic flow between bosons and anti-bosons. The magnitude of this effect becomes greater as the in-medium mass splitting increases. With the increasing rapidity, the
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Systematic investigation of proxy-SU(3) model in light nuclei Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-01-12 H. Abusara, Mahmoud I. Alstaty
The proxy-SU(3) model is systematically used to obtain the ground state deformation and its evolution with neutron number for several isotopic chains (Z=28–34). These outputs are compared with the results of covariant density functional theory (CDFT) as well as the finite-range droplet macroscopic model (FRDM). Even Z results show good agreement with the CDFT results, while the odd Z results show good
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Electromagnetic transitions between two mesons containing different masses of heavy quarks using BS framework Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-01-08 Hluf Negash
In this paper, we calculate the electromagnetic (EM) transition decay widths between two mesons containing different heavy quarks (c and b) for the process; Bc∗→Bc+γ, using the Bethe–Salpeter (BS) framework. The calculated results are found to be in a reasonable agreement with other theoretical models but the experimental data for this problem is not yet available.
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Charge radius relations derived from the nuclear masses for two neighboring isotopes Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2024-01-05 Bao-Bao Jiao
In this paper, we get the nuclear mass-density parameter of known mass and known charge radius by using the AME2020 nuclear mass database and the CR2013 nuclear charge radius database. For the nuclei with N≥21, we obtained an empirical formula of the constant parameter equal to 0 for the difference of nuclear mass-density parameter between two neighboring isotope. That is, the nuclear mass-density
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Open charm mesons and charmonium states in magnetized strange hadronic medium at finite temperature Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-12-23 Amal Jahan C. S., Amruta Mishra
In this paper, we investigate the masses of the pseudoscalar (D(D0, D+), D̄(D0̄, D−) and vector open charm mesons (D∗(D∗0, D∗+), D̄∗(D̄∗0, D∗−) as well as the pseudoscalar (ηc(1S), ηc(2S)) and the vector charmonium states (J∕ψ, ψ(2S), ψ(1D)) in the asymmetric hot strange hadronic medium in the presence of strong magnetic fields. In the magnetized medium, the mass modification of open charm mesons due
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Photonuclear reaction in 67Zn Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-12-23 Sylvian Kahane, Raymond Moreh
Mono-energetic γ-beams (Δ∼10eV) based on thermal neutron capture, in a nuclear reactor, using the Mn(n,γ) reaction were utilized for generating a fast neutron source from Zinc, via the 67Zn(γ,n) reaction. One of the incident γ-lines of the Mn source at Eγ=7244keV, photoexcites by chance a resonance level in 67Zn, with subsequent emission of neutrons at an energy of 191keV. The cross-section for this
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Thermodynamic and hydrodynamic characteristics of interacting system formed in relativistic heavy ion collisions Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-12-23 Xu-Hong Zhang, Hao-Ning Wang, Fu-Hu Liu, Khusniddin K. Olimov
To study the energy-dependent characteristics of thermodynamic and hydrodynamic parameters, based on the framework of a multi-source thermal model, we analyze the soft transverse momentum (pT) spectra of the charged particles (π−, π+, K−, K+, p̄, and p) produced in gold–gold (Au–Au) collisions at the center-of-mass energies sNN=7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200GeV from the STAR Collaboration
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Electromagnetic form factors at low energy elastic electron–proton scattering Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-12-21 A. M. Abdalla, A. M. Eltanany, A. Saber
The prediction of quantum electrodynamics for elastic electron–proton scattering needs further modifications to agree with experimental data. Two scattering mechanisms that may occur are the forward and backward scattering angles for four-momentum transfer Q2=0.2 up to 0.8 (GeV/c)2. This is due to two different scattering centers. But the forward scattering is observed only at relatively high values
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Evolution of midrapidity average transverse momentum of pions, kaons, protons and antiprotons in Au+Au collisions in (snn)1∕2= 7–39-GeV energy range from the beam energy scan program Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-12-21 Khusniddin K. Olimov, Igor A. Lebedev, Boburbek J. Tukhtaev, Anastasiya I. Fedosimova, Fu-Hu Liu, Shokhida A. Khudoyberdieva, Shakhnoza Z. Kanokova
The 〈Npart〉 dependencies of the experimental average transverse momentum, 〈pt〉, of the charged pions, charged kaons, protons and antiprotons produced at midrapidity (|y|<0.1) in Au+Au collisions from the Beam Energy Scan (BES) program at the RHIC (Relativistic Heavy Ion Collider), measured by STAR Collaboration in the (snn)1∕2=7–39-GeV energy range, have been described quite well with the power-law
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Recent progress in configuration–interaction shell model Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-12-07 Menglan Liu, Cenxi Yuan
Since Mayer and Jensen employed the single-particle shell model to interpret the magic numbers, various microscopic nuclear models have been developed to study the nuclear force and structure. The configuration–interaction shell model (CISM), performed in truncated model space with the inclusion of the residual interaction, is one widely-used nuclear structure model. In the last decade, CISM has progressed
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Kinetic theory of overpopulated gluon systems with inelastic processes Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-11-30 Zhengyu Chen
In this work, the role of inelastic processes in the formation of a transient Bose–Einstein condensation (BEC) is investigated based on kinetic theory. We calculate the condensation rate for an overpopulated gluon system which is assumed to be in thermal equilibrium and with the presence of a BEC. The matrix elements of the inelastic processes are chosen as the isotropic one and the gluons are considered
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A review on anisotropic flow in heavy-ion collisions Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-10-26 Vipul Bairathi, Kishora Nayak
We present a review of published experimental measurements on anisotropic flow in heavy-ion collisions. Flow coefficients vn are presented for charged and identified hadrons at various beam energies ranging from sNN=7.7GeV to 200GeV at the Relativistic Heavy Ion Collider (RHIC) and sNN=2760GeV at the Large Hadron Collider (LHC). We present v1 and its slope dv1∕dy and discuss possible first-order Quantum
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Computation of quarkonium dissociation and recombination rates in quark–gluon plasma using Bateman equation Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-10-12 Abdulhameed Shukri, Abdulla Abdulsalam, Mohsin Ilahi, Abdul Salih, Eman Aljuhani
The quarkonium yield productions in the relativistic Heavy-Ion Collisions and their modifications within the Quark–Gluon Plasma (QGP) produced in the collisions have been investigated for more than four decades. Similarly, phenomenological model studies with various themes have been performed to comprehend the features of the QGP medium along with its associated particle production. This paper proposes
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Combination of SU(1,1)-transitional Hamiltonian and O(6) Casimir operator for description of intruder states in 112Cd nucleus Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-08-24 M. Rastgar, H. Sabri, A. O. Ezzati
In this paper, we used a method based on mixing formalism to improve theoretical predictions for energy spectra and quadrupole transition rates of 112Cd nucleus. To this aim, the transitional Hamiltonian in the affine SU(1,1) algebra has been extended by adding the O(6) Casimir operator and mixing Hamiltonian to improve the description of 42+ and 23+ intruder levels of this nucleus. We also considered
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Shape transition around 222Ra based on finite-temperature covariant density functional theory Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-08-17 Wei Zhang, Jin-Ke Huang, Yi-Fei Niu
The shape evolution and potential energy surfaces of even–even 220−240Ra are investigated in the (β2,β3) plane by the covariant density functional theory. For octupole-deformed 222Ra, the free energy surfaces, the deformations, the pairing gaps, the excitation energy as well as the specific heat with increasing temperature are analyzed. Based on the specific heat, 222Ra exhibits three distinct discontinuities
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The difference between charge polarizations of fission fragments deduced by the static theoretical model and in the current data library Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-08-14 Shuichiro Ebata, Shin Okumura, Chikako Ishizuka, Satoshi Chiba
In this paper, we propose a theoretical method to deduce the charge polarization (CP) and most probable charge for fission fragments for the selected range of mass numbers based on a quantum many-body framework, namely, a constrained Skyrme Hartree–Fock+BCS model. We investigate the CP on the low energy neutron-induced fission of 235U as a representative reaction. We have found that the calculated
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A possibility of existence of a pseudovector-type quark–antiquark condensate in the quark matter and Nambu–Goldstone modes on that condensate in the Nambu–Jona–Lasinio model Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-08-14 Kentaro Hayashi, Yasuhiko Tsue
A possibility of a pseudovector-type quark–antiquark condensed phase, which leads to a quark spin polarized phase, in the quark matter is investigated taking account of the vacuum effects leading to the chiral symmetry breaking by using the Nambu–Jona–Lasinio model. Also, possible Nambu–Goldstone modes on the pseudovector-type quark–antiquark condensate and the tensor-type quark–antiquark condensate
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Shell-model-like approach based on covariant density functional theory in 3D lattice space: Evolution of octupole shape in rotating 224Th Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-08-09 Fangfang Xu, Yiping Wang
The evolution of the octupole shape with rotation in pear-shaped nuclei is a topic of broad interest. Based on the cranking covariant density functional theory in 3D lattice space, a shell-model-like approach is implemented to take into account the pairing correlations, and applied for the interleaved positive- and negative-parity bands in 224Th. The experimental I−ω relations are well reproduced.
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Systematic study of α-decay half-lives for Pa isotopes using MGLDM model Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-08-07 Dashty T. Akrawy, H. C. Manjunatha, G. Saxena, Ali H. Ahmed, N. Sowmya
The α-decay half-lives for odd Z Pa isotopes were estimated by using the modified generalized liquid drop model (MGLDM) in the neutron number range 120≤N≤150. These half-lives are found to be an excellent match with available experimental data certified by the least root mean-square error when compared with the other recently proposed empirical formulas. The applicability of MGLDM is proved on the
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An empirical formula for the alpha decay half-lives Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-08-04 Z. Rashidpour, D. Naderi
Using 377 available experimental data, we have obtained an empirical formula to calculate alpha decay half-lives based on Geiger–Nuttall law for even–even, even–odd, odd–even and odd–odd nuclei. The coefficients of Geiger–Nuttall law have been modified as a function of the atomic number of the parent nucleus and the orbital angular momentum. The obtained root mean square deviations from experimental
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Calculation of the neutron cross-section for iron group nuclei in ℓ≠0 case Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-08-05 A. M. Alshamy, M. M. Musthafa
Total neutron cross-sections for iron group nuclei with energies 30 MeV≤En≤100 MeV have been theoretically calculated, for ℓ≠0 case. In this work, the collision matrix has been modified for a smooth spherical optical potential, which varies slowly with distance inside of target nucleus. Results agree well with the experimental data and TALYS 1.9 code. It has been found that a finite number of the angular
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Octupole deformation and Ra puzzle with covariant density functional theory in three-dimensional lattice space Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-08-02 D. D. Zhang
The anomaly of the residual proton–neutron interaction δVpn for Ra isotopes around N=135 deviating from the general trend, the so-called Ra puzzle, is investigated within the framework of covariant density functional theory in three-dimensional lattice space. The potential energy surfaces in (β20,β30) plane for Ra isotopes are given by the constrained calculations. The average values of proton–neutron
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An improved microscopic core–quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-07-28 Xin Zhao, Zhipan Li, Dario Vretenar
The microscopic core–quasiparticle coupling model for odd-A nuclei with octupole correlations is extended to include the monopole, quadrupole and octupole couplings between the core and the odd nucleon, based on the framework of covariant density functional theory. The model is tested in a study of low-lying excitation spectra for the odd-A nucleus 225Ra. Theoretical results, e.g., the parity doublets
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Quark condensate and magnetic moment in a strong magnetic field Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-07-19 De-Xian Wei, Li-Juan Zhou
This paper studies the quark condensate, magnetic moment, magnetic polarization, and magnetic susceptibility in a strong external magnetic field by employing the Dyson–Schwinger equations (DSE). The results show these physical quantities as functions of the magnetic field. We note that the quark’s spin polarizations are approximately proportional to the magnetic field magnitude. For comparison, we
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Multiphonon structure of high-spin states in 40Ca, 90Zr and 208Pb Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-07-19 N. Lyutorovich, V. Tselyaev
The method of description of the high-spin states, which was previously developed and applied for the states of this type in 208Pb, is generalized for the case of the states having more complex multiphonon structure. In this method, the harmonic approximation with the renormalized phonons is used in which the phonons themselves are determined within the nonlinear version of the model based on the random-phase
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Self-affine pionization in p–p collisions at LHC energy Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-07-08 Shreya Bhattacharjee, Subhadeep Paul, Azharuddin Ahmed, Abdel Nasser Tawfik, Prabir Kr. Haldar
The two-dimensional intermittency and its self-affine nature are investigated for p–p collisions at s=13TeV in the two-dimensional anisotropic (η−ϕ) space. The UrQMD model has been employed to generate and accumulate the p–p collisions data. Our investigation is made in the framework of scaled factorial moment (SFM) method. The concept of Hurst exponent H is incorporated to bring a qualitative comparison
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Reaction rate of 16O(n,γ)17O in R-matrix formalism at astrophysical energies Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-06-28 Soumya Saha, G. Gangopadhyay
The isotope 16O is one of the most abundant light isotopes, and therefore the process 16O(n,γ)17O reaction plays a critical role in stellar nucleosynthesis. Reaction cross-sections and rates for neutron capture by 16O at astrophysical energies have been calculated with special attention to low-lying, narrow resonances while implementing R-matrix formalism during integration.
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Hamiltonian sensitivity in calculating the electromagnetic moments and electroexcitation form factor for the sd nuclei using shell model with Skyrme–Hartree–Fock Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-06-17 Omar A. Alswaidawi, Ali A. Alzubadi
In this work, the nuclear electromagnetic moments for the ground and low-lying excited states for sd shell nuclei have been calculated, resulting in a revised database with 56 magnetic dipole moments and 41 electric quadrupole moments. The shell model calculations are performed for each sd isotope chain, considering the sensitivity of changing the sd two-body effective interactions USDA, USDE, CWH
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Fission within dinuclear system approach Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-06-14 H. Paşca, A. V. Andreev, G. G. Adamian, N. V. Antonenko
The improved scission-point statistical model based on the dinuclear system approach is employed to describe spontaneous fission, electromagnetic-, neutron-, charged-particle- and heavy-ion-induced fission of even–even pre-actinides, actinides and superheavy nuclei and to analyze the correlations between various observables. The key element of the model is the calculation of potential energy surfaces
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Comparisons of matrices with different elements but identical eigenvalues Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-06-14 Daren Sitchepping Fosso, Larry Zamick, Castaly Fan
In this paper, we show two matrices that have identical eigenvalues but different eigenfunctions. This shows that in obtaining two-body nuclear matrix elements empirically, it is not sufficient to consider only energy levels. Other quantities like transitions must also be included.
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Analysis of super-deformed bands in A∼150 mass region: The principal-axis cranking versus the variable moment of inertia Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-06-14 Sham S. Malik, Rajeev K. Puri
A systematic study of the super-deformed (SD) bands in A∼150 mass region is carried out by using two different approaches, namely, the Principal-axis Cranking (PAC) and the Variable Moment of Inertia (VMI). Both these approaches not only support each other’s results but also their hand-in-hand calculations help us in establishing the prominent features, like the band-head spin, parity, quadrupole moment
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An overview of new measurements of flow, chirality and vorticity from STAR experiment Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-06-07 Chunjian Zhang, for the STAR Collaboration
In relativistic heavy-ion collisions, the properties of quark–gluon plasma (QGP) and complex dynamics of multi-scale processes in Quantum Chromodynamics (QCD) are studied by analyzing the final state produced particles in a variety of different ways. In these proceedings, we present an overview of new detailed measurements of flow, chirality and vorticity by the STAR experiment at Relativistic Heavy
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Event-by-event multiplicity fluctuations and correlations in ring-like and jet-like events in 197Au–AgBr collisions at 11.6 A GeV/c Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-06-07 Bushra Ali, Sweta Singh, Anuj Chandra, Shakeel Ahmad
Event-by-event (ebe) multiplicity fluctuations and correlations amongst the charged particles emitted in the forward–backward symmetric pseudorapidity (η) windows of varying widths and positions are investigated by analyzing the experimental data on 197Au–AgBr collisions at 11.6AGeV/c. The findings are compared with the predictions of relativistic transport model, urqmd and independent particle emission
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Effect of nuclear incompressibility on the fine structure of odd–odd superheavy nuclei Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-05-18 S. A. Seyyedi, A. Razmara, A. Akhound
In this research, the alpha decay fine structure for odd–odd nuclei has been investigated considering the effects of incompressibility of nuclear matter density in the range of 83≤Z≤92. In our calculations, transitions from the parent nuclei’s ground state to the daughter nuclei’s excited states have been considered. In these calculations, the double-folding model with effective finite-range nucleon–nucleon
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Ground state and fission properties of even-A uranium isotopes from multidimensionally-constrained relativistic mean field model Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-05-10 Xiang-Quan Deng, Shan-Gui Zhou
The multidimensionally-constrained covariant density functional theories (MDC-CDFTs) have been developed to study the influence of octupole and triaxial deformations on the ground state and fission properties. In this paper, we present a brief review of the applications of MDC-CDFTs and discuss the results of a systematical study of even-A uranium isotopes with the multidimensionally-constrained relativistic
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Analysis of elastic scattering of 6,7Li and 20Ne from 24Mg nucleus using microscopic potentials Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-05-10 Sh. Hamada, A. H. Al-Ghamdi, Arafa A. Alholaisi, Awad A. Ibraheem, N. Amangeldi, Y. Abdou
The experimentally available angular distributions (ADs) for 6,7Li and 20Ne ions elastically scattered from a 24Mg target are reanalyzed using various nuclear potentials based on phenomenological as well as microscopic approaches. The considered data are 6Li+24Mg ADs at Elab=20, 88 and 240MeV; 7Li+24Mg ADs at Elab=20, 34 and 88MeV; and 20Ne+24Mg ADs at Elab=50, 60, 80, 90 and 100MeV. Special emphasis
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Monte Carlo simulation study on simultaneous detection of neutrons and gamma-rays with a GdI3:Ce scintillator detector Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-05-06 B. Park, A. Park, S. Lee, J. Lee, C. Kim, C. Kim
Neutron detection using gadolinium (Gd) and its prompt gamma-rays is vital because of the high cross-section of Gd on thermal neutrons, thereby leading to significant interest in neutron detection with Gd-converted or Gd-loaded detector. However, simultaneous detection of neutron and gamma-rays with a Gd-loaded scintillator has been given less attention. In this study, we explored the feasibility of
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Asymmetry correlation of neutron skin thickness using relativistic density-dependent hadronic formalism Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-04-26 S. Haddad
The neutron skin thickness is calculated for spherically symmetric even–even lead and tin isotopes, and N=126 and N=82 isotones, with known experimental masses. A relation correlating the neutron skin thickness with the asymmetry parameter is determined, which may be used to constrain the nuclear equation of state.
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Cluster model for calculation binding energy of 222,224Ra Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-04-26 Keivan Darooyi Divshali, Mohammad Reza Shojaei
The nucleus can be considered a relativistic system, In particular, we focus on heavy nuclei with zero spin and utilize the relativistic core-cluster model to investigate their structure properties. A zero-spin nucleus is assumed to consist of a core and a cluster, core and cluster spins are zero. We will solve the Klein–Gordon equation, which is a relativistic equation optimized for studying zero-spin
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New perspective of the role of the triaxiality parameter γ for γ–g B(E2)s Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-04-17 J. B. Gupta, Vikas Katoch
Recently, from the study of the absolute B(E2) values for the (γ–g) E2 transitions, the different roles of the triaxiality parameter γ=(0∘–20∘) and γ=(20∘–30∘) parts were pointed out. Here, the use of the triaxial rotor model expressions for the B(E2)s in producing the bell-shaped curve of B(E2,2γ−01+) is illustrated. The variation of certain (γ–g) B(E2) ratios versus γ for the states 2γ and 3γ are
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Analysis of elastic scattering angular distributions and fusion excitation functions of reactions induced by 9Be on 27Al, 28Si, 144Sm and 208Pb targets at near barrier energies Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-04-12 Chetna, Md. Moin Shaikh, Pardeep Singh, Rajesh Kharab
The elastic scattering angular distributions and the fusion excitation function data for the reactions induced by the loosely bound projectile 9Be on 27Al, 28Si, 144Sm and 208Pb targets at near and above barrier energies have been analyzed with a motive to investigate the importance of breakup couplings within the framework of continuum discretized coupled channels approach. It is found that at energies
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Influence of resonances on the 11B(n, γ)12B reaction rate. Capture to the excited states of 12B Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-04-10 S. B. Dubovichenko, N. A. Burkova, A. S. Tkachenko, A. V. Dzhazairov-Kakhramanov
Based on the framework of the modified potential cluster model (MPCM), with orbital states classified using Young diagrams, we consider the possibility of prediction absentee of experimental data for the total cross-sections of the radiative neutron capture on 11B to the first excited state of 12B at 0.95314MeV (2+), to the second excited state of 12B at 1.67365MeV (2−), and prediction absentee of
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Low-lying bound and resonance states in Λ61Ca and ΛΛ62Ca Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-04-06 M. Alam, M. Hasan, S. H. Mondal, Md. A. Khan
In this paper, the energy, and wavefunctions of the low-lying bound and resonance states of Λ61Ca and ΛΛ62Ca are studied. For Λ61Ca we adopted Λ+60Ca two-body cluster model while for ΛΛ62Ca we adopted Λ+Λ+60Ca three-body cluster model. Two models of potentials, namely SH: Hulthén type and WS: Woods–Saxon type potentials, each having a spin-orbit coupling term is chosen for the Λ-nucleus pair while
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High-order partition function correction effect on the nuclear thermal quantities Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-04-06 Belabbas Mohamed
Higher-order approximation based on Taylor expansion over the saddle point is employed to approach the partition function of a hot nucleus in the presence of the like-particle pairing correlations. Analytical expressions have been derived for the correction terms of different thermodynamic quantities such as energy, entropy and heat capacity. Furthermore, the theory has been applied to the schematic
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mT scaling approach to study the identical spectral shape and similar suppression patterns of π0 and η mesons at RHIC and LHC energies Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-04-04 Kajal, P. K. Khandai, M. K. Singh
We present a systematic study of the transverse mass (mT−m) spectra of π0 and η mesons in Cu+Au collisions at sNN=200GeV, U+U collisions at sNN=192GeV, Pb+Pb collisions at sNN=2.76TeV and p+Pb collisions at sNN=5.02TeV. The published data of invariant yields of π0 and η mesons as a function of pT are taken from PHENIX and from ALICE collaborations in the mid-rapidity region for different centrality
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Experimental review of octupole correlations in the A≈80 mass region Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-03-30 X. C. Han, C. Liu, S. Y. Wang
This review presents the nuclei with octupole correlations in the A≈80 mass region. The status of experimental data on the behavior of the energy displacement, the E1 transition probability and intrinsic electric dipole moment have been reviewed. The evolutions of the octupole strength with the numbers of protons and neutrons are discussed.
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Studies of angular distribution of the grey particles in 16O-emulsion collision at 3.7A GeV Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-03-30 N. Abdallah
By means of 4π emulsion track detectors, we report the characteristics of the experimental angular distributions of the fast target protons (grey particles) emitted in interactions of 16O with emulsion nuclei at 3.7AGeV. Grey tracks in nuclear emulsion corresponding protons with kinetic energy in the ranges 26
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Progress on production cross-sections of unknown nuclei in fusion evaporation reactions and multinucleon transfer reactions Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-03-16 Jing-Jing Li, Na Tang, Yu-Hai Zhang, Ming-Hao Zhang, Chen Wang, Xin-Rui Zhang, Long Zhu, Feng-Shou Zhang
The progresses on production cross-sections of unknown nuclei in fusion evaporation (FE) reactions and multinucleon transfer (MNT) reactions are reviewed. The synthesis of the superheavy nuclei (SHN) with Z=114, 119, 120, 121, and 122 in FE reactions is presented. As a promising pathway to produce neutron-rich nuclei, the MNT reactions near the Coulomb barrier are applied to investigate the generation
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Nuclear response to dark matter signals in Ge and Xe odd-mass targets Int. J. Mod. Phys. E (IF 1.1) Pub Date : 2023-03-10 M. M. Saez, O. Civitarese, T. Tarutina, K. Fushimi
The interaction of dark matter particles (weakly interacting massive particles (WIMPs)) with the odd-mass 73Ge and 131Xe target nuclei, that is, the recoil rates corresponding to the elastic scattering of WIMPs by these nuclei, is analyzed in the context of the minimal extensions of the supersymmetry model. The BCS+QRPA technique plus the quasiparticle–phonon coupling scheme is used to describe the