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Electronic structure, spectroscopy and photophysics of rubidium mono-sulphide J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-18 Bilel Mehnen, Sana Akkari, Wissem Zrafi, Ibtissem Jendoubi, Mohamed Bejaoui, Niyazi Bulut, Hamid Berriche, Majdi Hochlaf
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Relativistic calculations of energy levels, lifetimes, transition parameters, and electron impact excitation cross sections for Kr XIX J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-18 Nitish Ghosh, Lalita Sharma
In this study, we present a detailed analysis of atomic properties for Kr XIX, specifically focusing on the lowest 128 fine-structure levels originating from the , , and configurations. We report energy levels, lifetimes, wavelengths, weighted oscillator strengths, and transition probabilities for multipole transition types (E1, E2, M1, and M2). To achieve this, we employed the GRASP2018 code, which
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Transition probabilities and radiative lifetimes of C[formula omitted]: A high level theoretical investigation J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-12 Ramon S. da Silva
Dicarbon species are of particular interest within the physical chemistry community. However, contrary to neutral C, the theory of electronic structure and spectra concerning C ions is not well-established. To address this gap in information, high-level multireference configuration interaction (MRCI) calculations have been performed, and new potential energy curves for fourteen low-lying states of
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Four-component full relativistic study on the spectroscopic properties and direct laser cooling schemes for the PbH, PoH, BiH+, and AtH+ molecules J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-10 Jing-Zhen Luan, Chuan-Lu Yang, Xiao-Hu Li, Wen-Kai Zhao, Yu-Liang Liu
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Absorption properties by irregularly shaped particles with inclusions at visible and near-infrared wavelength regions J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-10 Kazuhiko Masuda, Hiroshi Ishimoto, Tomonori Tanikawa, Knut Stamnes
The absorption properties of snow and ice particles containing impurities such as black carbon (BC) and mineral dust (DS) were investigated using the geometrical optics approximation method (GOM). This study focuses on analyzing the single scattering co-albedo (SSCA) characteristics of non-spherical particles, aiming to enhance the interpretation of radiation observations in snow and ice regions. Particle
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Analytical presentation of symmetrized vibrational functions of high symmetry molecules for applications in molecular spectroscopy and chemical physics: Accurate prediction of the vibrational spectrum of GeH[formula omitted] up to 8000 cm−1 as a relevant application example J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-09 Oleg N. Ulenikov, Elena S. Bekhtereva, Olga V. Gromova, Anna L. Fomchenko, Petr A. Glushkov, Sigurd Bauerecker
We report here the analytical description of vibrational wave functions being most important for applications in quantum mechanics, molecular and chemical physics as applied to the high symmetry XY () molecules. A general method is discussed and, for the first time, all vibrational functions of such molecule type are presented in an analytical and symmetrized form for all polyads up to the polyad number
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Relativistic coupled cluster study on the spectroscopic and radiative properties of the KFr molecule and modeling of the transport properties of potassium–francium dilute gas medium J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-04 Yuliya Osika, Darya Meniailava, Maksim Shundalau
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Applicability assessment of effective-medium approximation in predicting radiative characteristics of fractal aggregates with non-absorbing spherical particles J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-31 Xiaoyue Zhang, Jin Zhang, Yuhan Zhang, Le Fang
Particles within aggregates are commonly in a status of dependent scattering due to the near-field multiple scattering and far-field interferences from neighboring particles. The integral radiative characteristics of fractal aggregates are consequently not only influenced by the monomer size parameter , the refractive index , and the monomer number , but also tied to the fractal dimension . The effective-medium
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A novel full spectrum correlated k-distribution model based on multiband fusion artificial neural network for gas absorption coefficient prediction J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-29 Qianwen Wang, Jiawen Wu, Bingyin Wang, Haoyu Dou, Biao Zhang, Chuanlong Xu
Gas radiation exhibits strong selectivity in the spectrum, with its radiation and absorption capabilities only present at distinct wavelength bands. This implies that calculating gas radiative property across the entire wavelength range is unnecessary. In contrast, a computing strategy oriented to the radiative properties for the wavelength band of interest is of great importance for radiative transfer
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Design, measurement, and demonstrating of a metamaterials with broadband and high transmittance for measuring the thermal conductivity of clothing fabrics samples J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-29 Junjie Zheng, Manzhong Liu, Min Zhong
An all dielectric metamaterial sensor with smooth spectral lines resonance characteristics over a large frequency range is demonstrated and verified. The average transmittance and reflectance of the metamaterial sample are 0.734 and 0.201 in the frequency range of 4–30 THz. The effects of three important factors on the thermal conductivity of the outdoor clothing fabric samples are measured by using
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Effects of positional disorder upon the nonlocal effective parameters of a metamaterial composed of coated spheres J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-28 Zeeshan A. Awan
An electromagnetic characterization of a bianisotropic medium based on nonlocal homogenization theory with small positional disorders has been presented. The proposed theory is general and can be used for any type of random positional disorders provided that the probability density functions associated with these positional disorders are known. Later, the proposed general theory was used for a nonlocal
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Line shapes of isotropic and depolarized CILS spectra of neon: Interaction potential and pair polarizability J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-28 J.-L. Godet, M.S.A. El-Kader, M.A. El-Naggar
The present work proposes three interaction potentials between two gaseous neon atoms and applies them to the study of models representing the anisotropy and trace of the induced pair polarizability tensor. The proposed empirical interatomic potentials for the gaseous Ne-Ne interaction are developed by fitting the Improved Lennard-Jones (ILJ), Modified Tang-Toennies (MTT) and Barker et al. (BFW) potentials
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Effect of dense plasma environment and external magnetic field on atomic structure and radiative properties of Ar XVII J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-27 Shivankar, Narendra Kumar, Alok Kumar Singh Jha, Mayank Dimri, Dishu Dawra, Man Mohan
Atomic structures and radiative properties of He like Ar XVII in the presence of dense plasma environments and external magnetic field have been presented within the framework of the relativistic theory. For this purpose, the relativistic configuration interaction method by incorporating the generalized b-potential and external magnetic field has been implemented. Plasma screening effect on 1sS → 1s2p
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The laboratory PROGRA2 database to interpret the linear polarization and brightness phase curves of light scattered by solid particles in clouds and layers J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-24 Jean-Baptiste Renard, E. Hadamcik, J.-C. Worms
Laboratory measurements of the brightness and linear polarization of the light scattered by clouds of particles are necessary to interpret remote sensing measurements of dust in space and in planetary atmospheres. For 30 years, such laboratory measurements were conducted by the PROGRA2 project for particles with different natures, sizes and shapes. The resulting database contains the brightness and
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Transition properties of the spin- forbidden a4Π-X2Π systems in the NO, PO and PS molecules J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-21 Lidan Xiao, Qinghui Wei, Siyaolitu An, Boris F. Minaev, Bing Yan
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Theoretically predicted CO2 lines near 700 nm not observed J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-21 Aleksandr A. Balashov, Ankit Raj, Szymon Wójtewicz, Roman Ciuryło, Daniel Lisak, Katarzyna Bielska
We present an experimental study of carbon dioxide absorption in the transparency window near 700 nm, where different calculations predicted several extremely weak bands. The measurements were done using the optical frequency comb-assisted cavity ring-down spectrometer reaching sensitivity (noise-equivalent absorption) of cm. None of 21 lines, predicted by the most comprehensive calculations, were
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Spectral profile of ro-vibrational transitions of HCl broadened by He, Ar and SF6: Testing the β-correction to the Hartmann-Tran profile and the speed dependent (complex) hard collision model J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-20 T. Le, J.-L. Doménech, N.H. Ngo, H. Tran
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Absorption of collimated incident radiation in a semitransparent strongly scattering medium: Computational analysis and explanation of red algae blooming in snow J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-20 Leonid A. Dombrovsky, Jaona H. Randrianalisoa
The study of directional radiation absorption in weakly absorbing and strongly scattering media is of interest for a variety of important applications, including laser hyperthermia of human tumors in a therapeutic window of transparency, determination of the optical and thermal properties of highly porous ceramics, and calculations of the deep solar heating of snow cover in polar regions and mountains
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Numerical study of near-field radiative heat transfer between bio-inspired spiny particles J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-18 F.Q. Zhang, Z.G. Xu
The spine-like structure appears on some smooth organisms and has a high light absorption cross-section. Inspired by the spiny structure in the nature, this study establishes models of solid and hollow spiny particles. The effects of spine cross-section size, uniform and nonuniform spine distribution, hollow size, gap, and spine dislocation on near-field radiative heat transfer of spiny particles are
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Branch dependence of halfwidths: Theoretical analysis of N2-broadened halfwidths of CH3Br in the v6 band J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-17 Q. Ma, C. Boulet
The N-broadened halfwidths of CHBr in the ν band have been calculated, along with the relaxation matrices W. These calculations employ our modified and refined versions of the Robert-Bonamy formalism. Extensive comparisons between the predicted halfwidths from the models and experimental measurements at = 296 K are presented. Our latest model very closely matches the measurements. Meanwhile, we considered
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Two-way ANOVA analysis of novel ALBDF functions obtained for H2O[sbnd]CO2 gas mixtures considering variable mole fraction ratios in oxy− and air−fuel combustion conditions J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-16 L.G.P. Rodrigues, F.R. Coelho, A. Krummenauer, V.C. Nardelli, F.H.R. França
In this study, three sets of absorption-line blackbody distribution functions (ALBDF) are generated for HOCO gas mixtures, computed directly from the effective absorption cross-section of the mixture. The new ALBDF database considers a large range of mole fraction ratios () between the participating species, from pure CO ( = 0) to pure HO ( → ∞). The first set matches oxy-fuel combustion conditions
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Fine- and hyperfine structure semi-empirical studies of atomic cobalt. Even-parity configurations system J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-16 M. Klempka, M. Elantkowska, J. Ruczkowski
We present the results of multiconfiguration semi–empirical calculations of the fine structure () and the hyperfine structure () for the even-parity level system of atomic cobalt (Co I), using all available experimental data. These results were obtained using our proprietary software package designed for complex atom structure analysis. Through the iterative fine-structure calculation procedure, predictions
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Submillimeter wave spectrum of methylene chloride, [formula omitted]CH[formula omitted]Cl[formula omitted], [formula omitted]CH[formula omitted]Cl[formula omitted]Cl and [formula omitted]CH[formula omitted]Cl[formula omitted] up to 1.1 THz J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-15 O.N. Ulenikov, O.V. Gromova, E.S. Bekhtereva, H.S.P. Müller, L. Margulès
High resolution spectra of methylene chloride in natural abundance are recorded in wide spectral regions from 0.075 up to 1.090 THz. The 5095 multiplet center frequencies with the value of quantum number and were assigned to the CHCl species. A weighed fit of the experimental data allowed us to obtain a set of 20 rotational and centrifugal distortion parameters which reproduce the initial experimental
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High-resolution ro-vibrational spectrum of H[formula omitted]S in highly excited vibrational states: Re-visiting the first decade J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-13 F. Zhang, O.N. Ulenikov, E.S. Bekhtereva, O.V. Gromova, E.V. Gappel, C. Sydow, K. Berezkin, C. Maul, S. Bauerecker
High resolution spectra of the HS hydrogen sulfide are re-analyzed in the region of its first decade. Thanks to the improvement of the experimental conditions (in particular, an increase in both the instrumental resolution and the effective absorption path length by 1.5 times), on the one hand, and of the use of a more correct Hamiltonian model (which additionally takes into account the interactions
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EUV photoabsorption spectrum of N-like fluorine using dual laser plasma technique J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-12 Su-Hao Rong, Shu-Xing Wang, Zhi-Wei Nie, Chang Liu, Jin-Xin Huang, Jin-Feng Chen, Kai-Xuan Zhang, Guang-Yue Hu, Lin-Fan Zhu
Employing the dual laser plasma technique, we measured the extreme ultraviolet (EUV) photoabsorption spectrum of F ions, spanning the energy range from 53 to 93 eV with an energy resolution () of 866. The measured spectrum is carefully analyzed by comparing with the available reference data and theoretical calculation using the Cowan code. We identify prominent transitions to the Rydberg series and
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An advanced light scattering imaging model for total internal reflection microscopy considering a stratified medium J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-11 Alexandru Doicu, Dmitry S. Efremenko, Christopher L. Wirth, Thomas Wriedt
An advanced light scattering model for Total Internal Reflection Microscopy (TIRM) is presented. The model considers the specific TIRM geometry and deals with the scattering by an axisymmetric particle of arbitrary orientation placed in a stratified medium and the imaging of the scattered field. The scattered field is computed by truncating the scattered and internal field expansions and by using spherical
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Corrigendum to “Line parameters measurements and modeling for the ν6 band of CH3F: Generation of a complete line list for atmospheric databases” J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-11 M.V. Khan, D. Jacquemart, M. Guinet
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Corrigendum to “An approach for a polychromatic generalized Lorenz-Mie theory” [J. Quant. Spectrosc. Radiat. Transfer 312 (2024), 108824] J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-07 Leonardo A. Ambrosio, Jhonas. O. de Sarro, Gérard Gouesbet
In Ambrosio (2024), the authors have developed the polychromatic generalized Lorenz-Mie theory and presented the expressions for several physical quantities of interest, including the scattered intensities. However, even though the final results are correct, in deriving the expressions for these intensities, an error was made in the formulation. This error is here corrected.
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Bridging physics and statistical learning methodologies for the accurate modeling of the radiative properties of non-uniform atmospheric paths J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-06 F. André, C. Delage, L. Guilmard, M. Galtier, C. Cornet
The objective of the present work is to describe a technique to approximate atmospheric path transmissivities using a recurrent structure, following a method proposed recently but limited to date to high temperature applications. The physical model together with its underlying statistical assumptions is detailed. It is found to involve a rather simple analytical formula that applies both to two-layers
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Radiative transfer in luminescent solar concentrators J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-05 Sha Li, Sophia Haussener
A luminescent solar concentrator (LSC) offers a viable solution to spectrally convert and concentrate both direct and diffuse sunlight without the need for tracking. Its potential for commercialization is currently limited by the optical performance. A detailed understanding of the effects of both waveguide and luminophore properties is crucial for designing efficient LSCs. Herein, a self-consistent
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A variance deconvolution estimator for efficient uncertainty quantification in Monte Carlo radiation transport applications J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-02 Kayla B. Clements, Gianluca Geraci, Aaron J. Olson, Todd S. Palmer
Monte Carlo simulations are at the heart of many high-fidelity simulations and analyses for radiation transport systems. As is the case with any complex computational model, it is important to propagate sources of input uncertainty and characterize how they affect model output. Unfortunately, uncertainty quantification (UQ) is made difficult by the stochastic variability that Monte Carlo transport
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Refined line-shape parameters for CO lines broadened by air predicted from requantized classical molecular dynamics simulations J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-02 F. Hendaoui, H.T. Nguyen, H. Aroui, N.H. Ngo, H. Tran
Line-shape parameters and their temperature dependences for CO lines broadened by air have been predicted using requantized classical molecular dynamics simulations. The latter were carried out for mixtures of CO in air for five temperatures ranging from 200 K to 400 K, all at a pressure of 1 atm. For each temperature and pressure condition, various Doppler widths have been considered enabling the
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Theoretical analysis of the electronic structure and electron collision ionization process in a strongly coupled semi-classical plasma environment J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-03-01 Zhan-Bin Chen, Peng-Fei Liu, Hua-Yang Sun
In this work, we propose a distorted wave method in the relativistic framework to analyze the electron collision ionization process under the influence of strongly coupled semi-classical plasmas. A pseudopotential is used to represent the screened interactions between the core and outer electron, together with solving the Dirac equation to take care of the relativistic effects. This potential characterizes
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3D Monte-Carlo simulations of lightning optical waveforms and images observable by on-board operational instruments J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-28 A. Rimboud, T. Farges, L. C-Labonnote, P. Dubuisson, C. Barthe, F. Thieuleux
Atmospheric scattering and absorption of the flash radiations by the thundercloud are more or less important depending on the microphysics and density of the cloud, the spatio-temporal characteristics of the flash, or the wavelength of observation. Previous studies modeled these aspects but do not allow to fully interpret optical instrument measurements due to inaccurate representation of thunderstorm
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Dark and superdark theorems with applications to helical beams (beams with a topological charge) which are not vortex beams J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-27 Gérard Gouesbet
Relying on the time averaged Poynting vector expressed in terms of beam shape coefficients, dark and superdark theorems are discussed generalizing a previously published dark theorem. The superdark theorem allows one to characterize helical beams (that is to say beams possessing a topological charge) in terms of beam shape coefficients, and to demonstrate that beams with a topological charge equal
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Characterization of low-lying electronic states of diatomic sodium bismuthide cation including the spin-orbit coupling effect J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-27 Rong-Yao Jiang, Jin-Peng Wu, Zhuo-Jin Hu, Shan-Jun Chen, Song Li
We present a high-level investigation of the diatomic sodium bismuth (NaBi), which is a hitherto experimentally unknown species. The explicitly correlated multireference configuration interaction method is used to calculate energy points of thirteen low-lying Λ-S electron states associated with five dissociation limits. Detailed information on structural features, electronic characters, and spectroscopic
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Effect of ablation particles on ultraviolet radiation characteristics in exhaust plume J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-22 Ligong Zhang, Lu Bai, Jinlu Li, Yin Li, Xin Li, Lixin Guo
We propose a radiation model for a coupled gas-solid two-phase flow that includes ablation particles. This model is designed to compute the UV radiation characteristics of a plume containing ablation particles, employing the SHDOM method. The model considers the distribution characteristics of the ablation particles. Subsequently, we calculates the scattering phase function of these particles, along
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Approximate solution to the photon migration problem in a turbid medium based on the path-integral approach J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-21 Jaromír Petržala
The functions characterizing the directional and spatial distribution of photons propagating through an infinite scattering medium can be expressed in the form of specific path-integrals. However, these are not solvable analytically and have to be approximated by a more suitable form, while we require the preservation of only a few relaxed constraints imposed on the photon transport. The path integral
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The collision-induced absorption of H2 near 1.20 µm: Subatmospheric measurements and validation tests of calculations J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-17 A.O. Koroleva, S. Kassi, H. Fleurbaey, A. Campargue
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Learning closure relations using differentiable programming: An example in radiation transport J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-16 A.J. Crilly, B. Duhig, N. Bouziani
Reduced order models with unknown closure relations are ubiquitous in transport problems. In this work, we present a machine-learning approach to finding closure relations utilising differentiable programming. We use the Su Olson radiation transport test problem as an example training data set. We present novel closures for second angular moment (variable Eddington factor), third angular moment and
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Water-vapor absorption database using dual comb spectroscopy from 300 to 1300 K part I: Pure H2O, 6600 to 7650 cm-1 J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-15 Scott C. Egbert, Keeyoon Sung, Sean C. Coburn, Brian J. Drouin, Gregory B. Rieker
We present broadband dual frequency comb laser measurements of pure HO absorption (natural isotopic abundance of 99.7 % HO) from 6600 to 7650 cm (1307–1515 nm) with a spectral point spacing of 0.0068 cm. Twenty-nine absorption spectra were collected at temperatures between 300 and 1300 K (±0.81 % average uncertainty) and pressures ranging from 0.5 to 16 Torr (±0.27 %) with an average residual absorbance
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Time-resolved Fourier transform infrared emission spectra of atomic Xenon: Newly measured Rydberg [formula omitted]-, [formula omitted]- and [formula omitted]-levels J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-15 S. Civiš, E.M. Zanozina, P. Kubelík, V.E. Chernov, A. Pastorek, M. Ferus
The time-resolved Fourier transform technique was employed to record the spectrum of neutral xenon (Xe I) within a distinct spectral range of 700–14000 cm range. A complete series of up to one hundred scans were carried out and averaged to obtain a satisfactory signal-to-noise ratio with a resolution of 0.02 cm, providing a detailed and high-quality representation of the xenon spectra. All existing
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Artificial neural network for inferring radiative property variations across advanced high strength steel coils J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-14 Nishant S. Narayanan, Fatima K. Suleiman, Wanda Melfo Prada, Marga Zuijderwijk, Kyle J. Daun
This work proposes a parametric, surrogate artificial neural network (ANN) for inferring the radiative properties of advanced high-strength steel (AHSS) alloys in their cold-rolled and pre-annealed condition using surface optical imagery and topography parameters. The ANN proposed in this study may serve as a complementary method to physics-based models for the prediction of radiative property variations
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First HFC-134a retrievals from ground-based FTIR solar absorption spectra, comparison with TOMCAT model simulations, in-situ AGAGE observations, and ACE-FTS satellite data for the Jungfraujoch station J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-10 Irene Pardo Cantos, Emmanuel Mahieu, Martyn P. Chipperfield, Christian Servais, Stefan Reimann, Martin K. Vollmer
Successive regulations on the production and consumption of chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) have led to the use of hydrofluorocarbons (HFCs) as substitution products. Consequently, these potent greenhouse gases are now controlled under the Kigali Amendment (2016) to the Montreal Protocol. HFC-134a is the preferred substitute to CFC-12 as a refrigerant and is the most
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VO2-based switchable thermal emitters using magnetic polaritons J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-09 Lin Jin, Jinlin Song, Lei Chen, Xinjie Yao, Hailong Zhao, Qiang Cheng
Regulation of thermal radiation plays a significant role in many applications, including radiative cooling, infrared camouflage and so on. In this work, a narrow-band VO-based thermal emitter composed of Ti/VO/Ti grating is first proposed to switch thermal radiation. Due to the exaction of MPs, the emitter yields a high and direction-insensitive emission peak in the mid-infrared when VO is at insulating
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Fire monitoring and detection using brightness-temperature difference and water vapor emission from the atmospheric infrared sounder J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-06 Jason Yu, Xun Jiang, Zhao-Cheng Zeng, Yuk L. Yung
Radiance data from the Atmospheric Infrared Sounder (AIRS) on board NASA's Aqua satellite provide an opportunity for fire detection. As wildfires play an increasingly great role in the environments of the United States West Coast, emergency teams face an ever-challenging task of mitigation and prediction. Furthermore, the increasing rate of wildfires in the American West Coast places an ever-increasing
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Vertical and horizontal surface roughness scales: Influences on particle scattering properties J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-05 Chao Liu, Hengzhi Wang, Yingying Zhu, Dong Liu, Xijuan Zhu
A systematic modeling study is conducted to investigate the effects of vertical and horizontal scales of small-scale surface roughness on the scattering properties of atmospheric particles, e.g., ice crystals and dust particles. Regular Chebyshev rough surfaces and randomly generated irregular surfaces, both of which can provide well-defined vertical and horizontal scales, are developed as rough surface
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Exploring the low-lying electronic states of C4H6OS isomers, dihydro-2(3H)-thiophenone and dihydro-3(2H)-thiophenone J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-05 S. Kumar, D. Duflot, N.C. Jones, S.V. Hoffmann, P. Limão-Vieira
Results of a detailed study on the electronic state spectroscopy of CHOS isomers, dihydro-2(3H)-thiophenone and dihydro-3(2H)-thiophenone, have been obtained from high-resolution vacuum ultraviolet photoabsorption experiments together with quantum chemical calculations. The absolute photoabsorption cross-sections in the 3.7–10.7 eV energy range were obtained at the AU-UV beam line, ASTRID2 synchrotron
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Determination of the radiative transition rates in Ta VII using a multiplatform approach J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-29 E. Bokamba Motoumba, S. Enzonga Yoca, P. Quinet, P. Palmeri
Tantalum (Z=73) is an element that is produced in the neutron-induced transmutation of tungsten (Z=74) which in turn will compose the divertors in Tokamaks. As a consequence, their sputtering may generate ionic impurities of all possible charge states in the deuterium-tritium plasma that could contribute to radiation losses in controlled nuclear devices. The radiative properties of these ions have
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Experimental and theoretical investigations of the Stark width and shift of the He I 388.865 nm spectral line J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-03 A. Bacławski, A. Bartecka
We report the results of comprehensive (both experimental and theoretical) studies of Stark broadening parameters (width and shift) of the He I 388.865 nm (2s S – 3p P) spectral line. Measurements have been performed using the wall-stabilized arc operated in a helium gas with small admixture of hydrogen and nitrogen at atmospheric pressure. The radiation of the plasma emitted in an end-on direction
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Identification of fog Particle Size Distribution by a radiative transfer equation inversion J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-03 Ali Krayem, Frédéric Bernardin, Arnaud Münch
For autonomous driving applications, we investigate the fog Droplet Size Distribution (DSD) identification from spectral radiation measurements in the range 350 nm–2500 nm by inverting the 1D stationary radiative transfer equation (RTE). This distribution together with Lorenz–Mie scattering theory allow to compute the optical properties (scattering coefficient, absorption coefficient, and scattering
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Ab initio calculations on spectroscopic and transition properties of NaHe including spin-orbit coupling J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-03 Di Liu, Yun Yang, Tong Wang, Mingbo Yu, Dawei Zhang, Bing Yan
The interactions between alkali-metal atoms and rare-gas atoms have attracted much theoretical and experimental research interest. And accurate spectroscopic parameters play a crucial role in understanding the bond components of the interatomic potentials. In this study, the high-level calculations on the Rydberg states of NaHe correlating with the lowest seven dissociation limits are performed by
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Complex multicomponent spectrum analysis with Deep Neural Network J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-02 Gilson Ronchi, Elijah H. Martin, Cornwall Lau, C. Christopher Klepper, Marc Goniche, WEST Team
In this paper, we present the use of deep neural networks to estimate physical parameters from complex optical emission spectra of the D/H transition. Specifically, we focus on estimating the radio frequency electric field vector of the lower hybrid wave and isotope ratio within the scrape-off-layer plasma of the WEST tokamak. Fitting the spectral data using a traditional non-linear least squares analysis
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Intensities in the composite infrared spectrum of SF6 in mixtures with air at 296 K J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-02-01 A.V. Domanskaya, K. Berezkin, G. Li, H. Bohlius, M. Kim, J.J. Harrison, V. Ebert
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Symmetries of circularly axisymmetric beams expressed in terms of beam shape coefficients J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-26 Gérard Gouesbet
Previous works have been devoted to the symmetry properties of the Poynting vector for longitudinal axisymmetric beams expressed in terms of beam shape coefficients (BSCs). In the present paper, we examine the case of circularly axisymmetric beams. The former is defined as beams whose longitudinal component of the Poynting vector does not depend on the azimuthal angle. The latter is defined as beams
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Polarimetric coordinate validation for merging GRASP and AirMSPI FIREX-AQ observations J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-28 Clarissa M. DeLeon, Michael J. Garay, Olga V. Kalashnikova, Meredith K. Kupinski
Traditionally, aerosol retrieval algorithms are customized to specific instruments because of the diverse nature of remote sensing hardware architectures and data formats. This diversity can hinder the utilization of lower-level data products. Furthermore, a generalized aerosol retrieval approach has the potential to allow simultaneous use of observations from multiple platforms within a single retrieval
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Br I Spectral Line Measurements in the Range 2000 – 6000 cm−1: Part I J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-23 Chilukoti Ashok, Himal Bhatt, S.R. Vishwakarma, Arijit Sharma, M.N. Deo