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Landé gJ factors of the oddparity electronic levels of the terbium atom determined by laser spectroscopy J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220806
M. Suski, B. Furmann, M. Chomski, J. Ruczkowski, D. Stefańska, S. MielochIn the present work the experimentally determined values of Landé gJ factors for 20 oddparity electronic levels of atomic terbium are presented. The Zeeman splitting of the hyperfine structure was investigated using the method of laser induced fluorescence in a hollow cathode discharge lamp in a constant magnetic field. All of the values were determined for the first time, by the analysis of 32 spectral

VLIDORTQS: A quasispherical vector radiative transfer model J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220803
R. Spurr, V. Natraj, S.F. Colosimo, J. Stutz, M. Christi, S. KorkinWe present a new VLIDORTbased quasispherical vector radiative transfer (RT) model (VLIDORTQS) that was developed for forwardmodel simulations of longpath measurements in limb or nadirviewing sphericalatmosphere configurations. This paper provides a theoretical description of the RT model, in which the singlescatter radiation field is treated accurately in spherical geometry, while the diffuse

Combination of conformal mapping with variable discrete ordinates method for solving the radiation heat transfer in concentric spherical media J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220729
S.M. Hosseini SarvariThe radiation problem in onedimensional participating media between two concentric spheres is solved by mapping the concentric spherical domain into the planeparallel domain, where the radiative rays propagate along curved paths. The computational planeparallel domain is discretized into slices with constant radiative properties and the angular domain for each control volume is discretized into

A narrow band model based on the absorption coefficient and its application to the calculation of radiative transfer in twodimensional enclosures J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220729
Annette S. Fisher, Sarma L. RaniIn a recent article (Fisher and Rani, Vol. 277, JQSRT, 2022), we presented a narrow band model (NBM) with the absorption coefficient as the fundamental radiative property and applied it to predict radiative heat transfer in onedimensional (1D) nongray enclosures. In this communication, we investigate the accuracy of the NBM in computing radiative transfer in twodimensional (2D) nongray enclosures

Packed media radiativetransfer modeling with Gaussian particles: Application to spectra of icy regolith of Saturnian satellites J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220728
Gen Ito, Ludmilla Kolokolova, Dmitry Petrov, Karly M. PitmanThe radiative transfer theory with packed media correction (RTTPM) is a balanced, physically rigorous, and practical light scattering model that is suitable for modeling reflectance and similar spectra of densely packed particulate media. The static structure factor correction to the classical radiative transfer solution and actualization of fundamental particles of media with spheres or aggregates

Timeresolved fourier transform infrared emission spectroscopy of NH radical in the X3Σ− ground state J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220725
Adam Pastorek, Victoria H.J. Clark, Sergei N. Yurchenko, Svatopluk CivišThe NH radical is an extremely important specie in nitrogen chemical reaction networks, in the interstellar medium and atmospheric chemistry. Time resolved Fourier transform spectroscopy technique in the frequency range 10–13 µm has been applied for the measurement of a pure rotational spectrum of the NH free radical (NH) in the ground X3Σ− electronic state. Twelve high N (26–29) tripletresolved pure

Proposed clock transition in atomic chromium and the possible detection schemes J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220725
P. Głowacki, D. Stefańska, J. Ruczkowski, M. ElantkowskaIn this article radiative parameters for atomic chromium were determined by a semiempirical method. The eigenvector amplitudes, determined in our previously published work concerning the hyperfine structure parametrization for evenparity atomic chromium levels, were used. The calculated values of oscillator strengths and lifetimes for lowlying metastable Cr I levels are presented. On the basis of

Study of excited electronic states of the 39KCs molecule correlated with the K(42S)+Cs(52D) asymptote: experiment and theory J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220725
Jacek Szczepkowski, Anna Grochola, Wlodzimierz Jastrzebski, Pawel Kowalczyk, Romain Vexiau, Nadia BouloufaMaafa, Olivier DulieuUsing the polarisation labelling spectroscopy, we performed the detailed analysis of the level structure of excited electronic states of the 39KCs molecule in the excitation energy interval between 17500 cm−1 and 18600 cm−1 above the v=0 level of the X1Σ+ ground state. We prove that the observed states are strongly coupled by spinorbit interaction above 18200 cm−1, as manifested by numerous perturbations

Highresolution spectra of 2νOH overtone of transformic acid in the supersonic jet J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220721
Vít Svoboda, Jozef Rakovský, Ondrej VotavaFirst highresolution lowtemperature spectrum of the 2νOH overtone of transformic acid have been measured using directabsorption laser spectroscopy. The supersonic cooling in the jet expansion to 37 K has dramatically simplified the complex rovibrational structure of the band due to the thermal depopulation of higherlying rotational states. Altogether, 597 lines have been measured with a lineposition

Raman scattering in the earth’s atmosphere, part I: Optical properties J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220721
Suniti SanghaviRaman scattering in the Earth’s atmosphere is caused predominantly by its most abundant molecular components, N2 and O2. Modeling Raman scattering in the atmosphere is challenging for several reasons: the first challenge is the large number of molecular constants required for the computation of the wavelength/wavenumber shifts due to inelastic scattering by a given molecular species, and the corresponding

MRCI+Q study on SnF+ including spinorbit coupling J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220721
Qixiang Sun, Yinuo Lu, Yadong Liu, Lidan Xiao, Yong Liu, Bing YanThe lowlying electronic states correlated to the lowest dissociation limit of SnF+ are investigated using the multireference configuration interaction method including the corevalence correlations and the spinorbit coupling effects. Based on the computed potential energy curves of the Λ–S and Ω states, the spectroscopic constants of the bound states of SnF+ are determined. The Λ–S components of

Thermal emission in the successive orders of scattering (SOS) radiative transfer approach J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220720
M. HerrerasGiralda, P. Litvinov, O. Dubovik, Y. Derimian, T. Lapyonok, D. Fuertes, O. Sourdeval, R. Preusker, J. FischerThe Successive Orders of Scattering (SOS) approach [1] is one of the well known methods for solving the Radiative Transfer (RT) problem. Its efficiency in terms of speed and accuracy of computation was already demonstrated for scattering and absorbing atmospheres in Solar spectrum. Although there are no principle limitations to account for the emission processes, the application of the SOS method for

Water vapor absorption spectroscopy and validation tests of databases in the farinfrared (50–720 cm1). Part 1: Natural water J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220720
M. Toureille, A.O. Koroleva, S.N. Mikhailenko, O. Pirali, A. Campargue 
Emissivity prediction of functionalized surfaces using artificial intelligence J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220720
Greg Acosta, Andrew Reicks, Miguel Moreno, Alireza Borjali, Craig Zuhlke, Mohammad GhashamiTuning surface emissivity has been of great interest in thermal radiation applications, such as thermophotovoltaics and passive radiative cooling. As a lowcost and scalable technique for manufacturing surfaces with desired emissivities, femtosecond laser surface processing (FLSP) has recently drawn enormous attention. Despite the versatility offered by FLSP, there is a knowledge gap in accurately

The effects of advanced spectral line shapes on atmospheric carbon dioxide retrievals J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220717
D.A. Long, E.M. Adkins, J. Mendonca, S. Roche, J.T. HodgesLine shape effects such as speeddependence and collisional (Dicke) narrowing are manifest in high signaltonoise ratio laboratory spectra for a wide range of molecular species and sample conditions. However, these effects are usually neglected in spectroscopic models used in remote sensing of atmospheric greenhouse gases. Here we examine the effects of line profile choice on laboratory spectra and

Improvement and application of linearized invariant imbedding Tmatrix scattering method J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220716
Chenxu Gao, Bingqiang SunThe Jacobians of particle scattering properties with respect to aspect ratio and effective radius (re) using the invariant imbedding Tmatrix method (IITM) are significantly improved by circumventing the divergence of derivatives. The effective radius re is used in three definitions, which are rV, the equalvolume spherical radius, rS, the equalsurfacearea spherical radius, and rVS, the ratio of

High resolved Optical Emission Spectroscopy as accurate physics methodology for plasma freestream temperature characterization J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220715
L. Savino, D. Cinquegrana, A. French, M. De Cesare, A. Del VecchioIn this work the hypersonic plasma flow generated by SCIROCCO hypersonic facility has been experimentally characterized as test case, using a high resolved Optical Emission Spectroscopy (OES) during a high enthalpy test campaign. The CIRA methodology to measure rototranslational and NO vibrational temperatures of a free jet via analyses performed in the Ultra Violet spectral range has been improved

Aperture polarimetry of selected comets in 2018–2020: Observations and computer simulation J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220714
E. Zhuzhulina, D. Petrov, N. Kiselev, N. Karpov, A. SavushkinPolarimetric studies are an important source of information about the physical properties of celestial bodies. In 2018, we put into operation the new twochannel polarimeters in the Crimean Astrophysical Observatory and the Peak Terskol Observatory. With the help of these instruments, in the period from 2018 to 2020, we carried out measurements of the polarization characteristics of 19 comets. Based

Spinorbit calculations on SnBr: Potential energy curves, dipole moments and radiative lifetimes J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220708
Rui Li, Jiqun Sang, Huijie Guo, Xiaohe Lin, Qinan Li, Yong Wu 
Advanced quantitative analysis of colloidal solution of metal nanoparticles produced by laser ablation in liquids J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220712
Julio Car, Damjan Blažeka, Nikša Krstulović 
Corrigendum to “Rovibrational population distribution in the ground state of hydrogen isotopologues in LHD peripheral plasmas deduced from emission spectroscopy” [J. Quant. Spectrosc. Radiat. Transfer 267 (2021) 107592] J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220710
Hiroki Ishihara, Arseniy Kuzmin, Masahiro Kobayashi, Taiichi Shikama, Keiji Sawada, Seiki Saito, Hiroaki Nakamura, Keisuke Fujii, Masahiro HasuoAbstract not available

Uncertainties in multitemperature nonequilibrium partition functions and application to CO2 J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220709
U. Dubuet, E. Pannier, C.O. LauxMultitemperature models are often used as a simplified way to describe nonequilibrium gases. These models assume Boltzmann distributions within each energy mode, which is useful for reducing the number of parameters in computations. This assumption requires that the energy modes are properly separated (which is valid, for instance, for vibration and rotation in lowlying rovibrational levels of diatomic

Line lists for X3Σ− and a1Δ vibrationrotation bands of SO J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220709
Peter F. Bernath, Ryan M. Johnson, Jacques LiévinSO is found in several astronomical sources such as the atmospheres of Io and Venus. To complete our work on SO line lists, we used our previous fits for v = 0 to v = 6 for the X3Σ state and v = 0–5 for the a1Δ state [JQSRT 272, 107772 (2021)] for line positions, and highlevel ab initio calculations of electric dipole moments for line strengths for the vibrationrotation bands. LeRoy's RKR program

Light scattering by airborne ice crystals – An inventory of atmospheric halos J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220702
Jarmo Moilanen, Maria GritsevichAtmospheric halos are a light scattering phenomenon caused by airborne ice crystals in the atmosphere. Halos can be seen by the naked eye. They provide the observer the information on the kinds of ice crystals present in the sky during a halo display. A combination of ice crystals’ shape, their orientation, and light ray paths through the crystals dictates what halos will be observable. All wellknown

Ab initio calculations of Stark broadening parameters of C II spectral lines J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220626
Rihui Liang, Yanming Liu, Fangyan LiStark broadening is widely used in many research areas, but its applications are limited by the completeness of line width and shift. Based upon the transition line data evaluated by Kramida, we have predicted the Stark broadening parameters of singly ionized carbon by making use of Griem's semiempirical method. The comparison with experimental and theoretical data is conducted and the results presented

The ν3 band of 16O14N18O: Line positions and intensities J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220630
A.A. Marinina, D. Jacquemart, L. Krim, P. Soulard, V.I. PerevalovThe Fourier transform IR spectra of samples prepared by mixing two gaseous species 18O2/14N16O (1:2) have been recorded in the region of the ν3 band of nitrogen dioxide. The spectra contain the lines corresponding to the ν3 band of the 16O14N18O isotopologue within the 1540–1640 cm−1. In total 1795 lines of the ν3 band of this isotopologue were assigned with the rotational quantum numbers N and Ka

Analysis of nonequilibrium atomic and molecular nitrogen radiation in pure N2 shockwaves J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220628
Augustin TibèreInglesse, Brett A. CrudenThis paper presents an analysis of data previously reported from a test series in the Electric Arc Shock Tube Facility for incident shocks composed of pure nitrogen. The present work focuses on the lowest velocity measured in the test (approximately 7 km/s) where both molecular and atomic radiation are significant. Analysis of the spectral data with the NEQAIR radiative transport code obtains postshock

Parallel inverseproblem solver for timedomain optical tomography with perfect parallel scaling J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220624
E.L. Gaggioli, Oscar P. BrunoThis paper presents an efficient parallel radiative transferbased inverseproblem solver for timedomain optical tomography. The radiative transfer equation provides a physically accurate model for the transport of photons in biological tissue, but the high computational cost associated with its solution has hindered its use in timedomain opticaltomography and other areas. In this paper this problem

Polarization properties of quasifractal porous particles J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220619
D.V. Petrov, E.A. ZhuzhulinaNumerous studies of cometary dust have shown that it has a fairly complex hierarchical structure. At the same time, space missions have provided evidence of solid particles. Computer modeling of light scattering, for which agglomerate debris particles were used, showed that the characteristics of the scattered light strongly depend on the presence of solid particles. We propose a model that makes it

Infrared bands of formaldehyde dissolved in liquid krypton at cryogenic temperatures and the vibrational modes ν1, ν2, and ν5 of H2CO in comets and interstellar clouds J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220618
Suresh Sunuwar, Helena DiezyRiega, Carlos E. Manzanares 
Fine and hyperfine resolved empirical energy levels of VO J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220616
Charles A. Bowesman, Hanieh Akbari, W.Scott Hopkins, Sergei N. Yurchenko, Jonathan TennysonA MARVEL (measured active rotationalvibrational energy levels) analysis of the spectra of vanadium oxide (VO) is performed, involving thirteen electronic states (6 quartets and 7 doublets). 51V16O data from 14 sources are used to form three networks: hyperfineresolved quartets, hyperfineunresolved quartets and hyperfineunresolved doublets. A single quartet network is formed by deperturbing the

Absorption cross sections of nbutane, npentane, cyclopentane and cyclohexane J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220617
Jason J. Sorensen, Peter F. Bernath, Ryan M. Johnson, Randika Dodangodage, W. Doug Cameron, Keith LaBelleThe infrared absorption cross sections of pure nbutane, npentane, cyclopentane and cyclohexane have been measured in the 3.3 µm region (and 6.8 µm region for cyclopentane) by high resolution Fourier transform spectroscopy. The samples had temperatures of 294 K and 230 K for nbutane, 294 K and 218 K for npentane, 296 K and 235 K for cyclopentane, and 294 K and 222 K for cyclohexane. These spectra

To the optical properties of moderately nonideal plasma J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220617
S.A. Khrapak, S.A. TriggerThe optical properties of nonideal completely ionized plasma are discussed from the perspective of the kinetic theory approach. It is demonstrated that a physically motivated modification of the Coulomb logarithm, originally proposed in the context of ionparticle scattering in dusty plasma, allows us to improve the theoretical description of the dynamical conductivity and hence of the optical properties

A new version of the program fitter for fitting atomic hyperfine structure in optical spectra including the calculation of confidence intervals J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220613
Andreas Zeiser, Sophie Kröger, Ladan PooyanWeis, Laurentius Windholz, Günter GuthöhrleinThe program FITTER, which has been used successfully for many years to analyze the hyperfine structure in atomic and ionic spectra, has been extended. Confidence intervals for all adjusted parameters are now calculated, adding essential information to the results. A brief overview of the theoretical basics of hyperfine structure is given, the calculation of the confidence intervals is presented and

Enhancing optical quantification of combustion products using thermochemical manifold reduction J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220612
R.B. Miguel, J. Emmert, K.J. DaunObtaining the composition and concentration distribution of combustion products from spectroscopic data often amounts to solving an illposed problem, which impairs the accuracy of recovered parameters. This study evaluates the feasibility of using a thermochemical manifold reduction (TCMR) mechanism to reduce the number of unknown parameters, thereby decreasing the illposedness of the problem. The

The extension of the Multiple Sphere T Matrix code to include multiple plane boundaries and 2D periodic systems J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220612
D.W. MackowskiAn extension of the parameter space available to the Multiple Sphere T Matrix (MSTM) code is described. The code can now calculate electromagnetic scattering and absorption characteristics of multiple spheres that are placed adjacent to multiple plane boundaries perpendicular to the z direction, with each boundary separating layers of different complex refractive index. The spheres can also form infinitely

An improved spectral approach for solving the nonclassical neutral particle transport equation J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220611
L.R.C. Moraes, J.K. Patel, R.C. Barros, R. VasquesAn improved modification of the Spectral Approach (SA) used for approximating the nonclassical neutral particle transport equation is described in this work. The term “Spectral” is used to indicate that the nonclassical angular flux is approximated as an expansion in terms of spectral basis functions. In the SA the basis functions are the Laguerre polynomials. The main focus of the modified SA lies

Аbsorption of diffuse light by 2D arrays of spherical particles J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220611
N.A. Loiko, A.A. Miskevich, V.A. LoikoThe problem of absorption of diffuse light by a 2D array of identical spherical particles is considered. The equations to solve this problem are derived on the basis of statistical approach. They can be used to match parameters of the array and the illumination system to get maximum absorption. The numerical results are presented for absorption coefficients of arrays with the imperfect triangular lattice

Energy levels of singly ionized and neutral zirconium J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220609
J.E. Lawler, J.R. Schmidt, E. A. Den HartogImproved energy levels for singly ionized and neutral zirconium of both even and odd parity are determined from Fourier Transform Spectrometer data using a leastsquares optimization procedure. Data from interferometric spectrometers provides much tighter control of systematic uncertainties in line position measurements than was achieved using older (e.g. Rowland Circle) dispersive spectrometers.

Trajectory tracking through the control of nonequilibrium Casimir force J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220607
Hideo Iizuka, Shanhui FanWe consider systems consisting of multiple plates, where the dynamics of the positions and the temperatures of the plates is determined by the nonequilibrium Casimir forces and the heat transfer between them, respectively. We numerically and theoretically show that in these systems, the temporal dependence of the position of a plate can be made to conform to a prescribed trajectory through a feedback

Modulation of apparent optical properties using arrayed mesoscale structures J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220606
David L. Simeroth, Peter A. Kottke, Onur A. Kucuktas, Andrei G. FedorovIn this study, a method for using arrays of mesoscale structures to modify the apparent optical properties of an opaque composite surface has been theoretically demonstrated to both raise and lower the apparent emissivity as compared to the intrinsic properties of the constitutive materials. For design problems where thermomechanical and optical material properties are both of importance, mesoscale

Backscatter amplification effect in a nonKolmogorov anisotropic turbulent medium J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220603
V.A. Banakh, A.V. FalitsThe paper presents a tool for numerical simulation of the backscatter amplification effect associated with doublepass propagation of laser radiation passing through an anisotropic nonKolmogorov turbulence. It is shown that for variety of powerlaw exponents of refractiveindex fluctuations, all other conditions being equal, the value of amplification factor also changes: the amplification factor

A new approach for accurately measuring the spectral emissivity via modulating the surrounding radiation J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220527
Kaihua Zhang, Yanfen Xu, Xiaohu Wu, Kun Yu, Yufang LiuAccurately measuring the spectral emissivity is of significant importance in thermal radiation. In this study, an improved measurement method for determination of spectral emissivity via modulating the surrounding radiation is proposed. A proofofconcept measuring apparatus is constructed, and the main component parts are described in detail. The temperature uniformity of the isothermal aperture is

Superresolution reconstruction of noisy gasmixture absorption spectra using deep learning J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220527
Yu.V. Kistenev, V.E. Skiba, V.V. Prischepa, D.A. Vrazhnov, A.V. Borisov 
Towards photophoresis with the generalized LorenzMie theory J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220526
Leonardo André Ambrosio, Jiajie Wang, Gérard GouesbetBased on the adjoint boundary value problem proposed decades ago by Zulehner and Rohatschek [1], analytic and closedform expressions for the photophoretic forces exerted by arbitraryshaped beams on homogeneous and lowloss spherical particles is derived in both the free molecular and slip flow regimes. To do so, the asymmetry vector for arbitrary refractive index particles is explicitly calculated

Magneticdipole lines in Felike and Mnlike molybdenum ions J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220525
Z.C. He, J. Meng, Y.J. Li, F.S. Jia, N. Khan, B. Niu, L.Y. Huang, Z.M. Hu, J.G. Li, J.G. Wang, Y.M. Zou, B.R. Wei, K. YaoOptical spectra of Felike Mo16+ and Mnlike Mo17+ ions were measured using the newly developed lowenergy electronbeam ion trap at Fudan University. The observed emission spectra incorporated six lines from Mo16+ ions and five lines from Mo17+ ions. These eleven lines included ten lines that were measured for the first time. Spectra modeling was carried out based on the collisionalradiative (CR)

The Qbranch of ν1+ν3+3ν4 band of 12C2H2 located at 8330 cm−1 J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220524
D. Jacquemart, O.M. Lyulin, A.M. Solodov, T.M. Petrova, A.A. Solodov 
HermanWallis factor for a molecule of type HCN J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220523
Konstantin V. Kazakov, Andrey A. Vigasin 
First observation of the CometTail (A2Πi→X2Σ+) system in the 12C17O+ cation J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220523
Izabela Piotrowska, Rafał Hakalla, Wojciech Szajna, Ryszard KȩpaIn the emission spectrum of the 12C17O+ isotopologue the CometTail (A2Πi→X2Σ+) system has been observed and analysed for the first time. 1215 spectral transitions in the 16 950 to 22 000 cm−1 region, belonging to three A−X (1−0,1−1 and 1−2) bands, were recorded with the Fouriertransform spectrometer and measured with an accuracy of 0.01 cm−1. As a result of analysis, 15 molecular parameters of the

Line coupling and line mixing effects on calculated widths of symmetrictop molecules with the kdegeneracy: A theoretical study of N2, O2, and airbroadened lines of CH3I J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220522
C. Boulet, Q. MaCalculations of the N2, O2, and airbroadened widths, together with their temperature dependence exponents have been made for transitions of CH3I in the ν5 and ν6 bands. The calculations are based on a semiclassical line shape formalism developed by the current authors through modifying and refining the RobertBonamy formalism. In recent years, we have applied this formalism for linear molecules

Expanded ro–vibrational analysis of the dyad region of CD4: Line positions and energy levels J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220522
S. Bauerecker, C. Sydow, C. Maul, O.V. Gromova, E.S. Bekhtereva, N.I. Nikolaeva, O.N. UlenikovThe high resolution infrared spectra of CD4 were measured with a Bruker IFS125 HR Fourier transform infrared spectrometer at an optical resolution of 0.003 cm−1 and analyzed in the region of 800–1400 cm−1 where the ν2/ν4 dyad is located. The number of 3633 and 1927 transitions with Jmax=31 and Jmax=28 were assigned to the ν4 and ν2 bands of CD4 (which is more than three times higher in comparison with

Nonequilibrium midinfrared black phosphorus light emitter and absorber for thermophotonic applications J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220521
Yuki Matsuno, Nobuhiro Nagumo, Masaya Araki, Kyohei Yada, Kazuki Yamaga, Atsushi SakuraiA nonequilibrium midinfrared black phosphorus (BP) light emitter and absorber for a thermophotonic (TPX) system was investigated in this study. A fluctuational electromagnetic simulation was performed to evaluate the nonequilibrium spectral energy fluxes from the bulk BP and between the bulk BPs, and the calculated spectral energy flux of the BP emitter exceeded the blackbody limit. The underlying

Landé gJ factors of the evenparity electronic levels of the terbium atom J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220519
M. Suski, M. Chomski, B. Furmann, J. Ruczkowski, D. StefańskaIn the present work Landé gJ factors for 17 evenparity electronic levels of the terbium atom are presented. The spectra of the Zeeman splitting of the hyperfine structure were recorded with the method of laser spectroscopy in a hollow cathode discharge lamp in a constant magnetic field, with laser induced fluorescence detection. The analysis of 47 spectral lines of terbium in the spectral range between

Measurement of temperaturedependent line parameters of ammonia transitions near 1103 cm−1 J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220519
Kun Duan, Yongbin Ji, Zhimin Lu, Wei RenAccurate knowledge of the line parameters of ammonia (NH3) transitions is important for developing precise laserbased NH3 sensors. We report the measurement of linestrengths and temperaturedependent broadening coefficients of NH3 with N2, air, Ar, and CO2 for six transitions in the ν2 fundamental band near 1103 cm−1. The absorption feature contributed by the target transitions is of particular interest

pyCRTM: A python interface for the community radiative transfer model J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220518
Bryan M. Karpowicz, Patrick G. Stegmann, Benjamin T. Johnson, Hui W. Christophersen, Edward J. Hyer, Andrew Lambert, Eric SimonThe Community Radiative Transfer Model (CRTM) is a powerful and versatile scalar radiative transfer model for satellite data assimilation and remote sensing applications. It is implemented as an objectoriented Fortran library, enabling flexible code development and optimal runtime performance on clusters. The downsides of the Fortran interface are a steep learning curve for students and the reduced

CRDS measurements of airbroadened lines in the 1.6 µm band of 12CO2: Line shape parameters with their temperature dependence J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220518
D. Mondelain, A. Campargue, H. Fleurbaey, S. Kassi, S. VasilchenkoThe 12CO2 band at 1.6 µm is used for carbon dioxide monitoring in the Earth atmosphere. The targeted accuracy of these measurements motivates important efforts to improve the quality of the spectroscopic parameters in atmospheric conditions. In the present work, the line shapes of the R(6), R(12), R(16), R(18) and R(20) transitions of the 3001300001 band of 12CO2 in air are studied with a cavity ring

Spectral invariants in ultrahigh spatial resolution hyperspectral images J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220517
Olli Ihalainen, Matti MõttusCurrent operational optical satellitebased Earth observation methods targeting at vegetation are optimised for the high and mediumresolution satellites with pixels sizes starting at ten meters. This resolution is coarser than the typical size of a vegetation structural element, such as a tree crown, and much coarser that of scattering elements, such as leaves. For this reason, vegetation can be

A methane line list with subMHz accuracy in the 1250 to 1380 cm−1 range from optical frequency comb Fourier transform spectroscopy J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220514
Matthias Germann, Adrian Hjältén, Vincent Boudon, Cyril Richard, Karol Krzempek, Arkadiusz Hudzikowski, Aleksander Głuszek, Grzegorz Soboń, Aleksandra FoltynowiczWe use a Fourier transform spectrometer based on a difference frequency generation optical frequency comb to measure highresolution, lowpressure, roomtemperature spectra of methane in the 1250 – 1380cm−1 range. From these spectra, we retrieve line positions and intensities of 678 lines of two isotopologues: 157 lines from the 12CH4 ν4 fundamental band, 131 lines from the 13CH4 ν4 fundamental band

Pressure broadening of 772.376 and 772.421 nm argon lines and kinetics of argon metastable atoms J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220513
Nader Sadeghi, Romain Magnan, Françoise MassinesTunable diode laser absorption spectroscopy is used for recording the spectrally mixed profiles of argon 772.376 nm (2p71s5) and 772.421 nm (2p21s3) lines at different argon background pressures between 0.3 and 1 atmosphere. The absorbing atoms in the Ar*(1s5) and Ar*(1s3) metastable states are produced in a planetoplane dielectric barrier glow discharge operating at 20 kHz. The pressure broadening

A fast method based on Dynamic Mode Decomposition for radiative heat transfer in participating media J. Quant. Spectrosc. Radiat. Transf. (IF 2.342) Pub Date : 20220507
M. Niknam Sharak, A. Safavinejad, M.K. MoayyediThe radiative transfer equation (RTE) is an integrodifferential equation and solving it is timeconsuming except in a few specific cases. A fast method based on dynamic mode decomposition (DMD) is introduced for solving the RTE in an absorbingemitting and scattering medium. First, some parameters are considered as independent variables. The RTE is solved for different values of these parameters (known