样式: 排序: IF: - GO 导出 标记为已读
-
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
-
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
-
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
-
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.
-
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
-
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
-
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
-
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
-
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
-
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
-
-
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
-
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
-
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
[Display omitted]
-
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
-
Water-Vapor Absorption Database using Dual Comb Spectroscopy from 300-1300 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
-
Time-resolved Fourier transform infrared emission spectra of atomic Xenon: Newly measured Rydberg g-, h- and i-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
-
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
-
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
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
-
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
-
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
-
-
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
-
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
-
A study on denoising with deep convolutional neural networks in spatial heterodyne spectroscopy J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-23 Wei Luo, Song Ye, Ziyang Zhang, Shuang Liu, Wei Xiong, Xinqiang Wang, Shu Li, Fangyuan Wang, Baijun Dong
Spatial heterodyne spectroscopy is a hyperspectral remote sensing technology. With the continuous improvement of signal detection accuracy, new methods are urgently needed to further reduce the interference of noise on the information contained in spatial heterodyne interferograms. Convolutional neural networks, as an emerging field, have achieved good results in image denoising in recent years. This
-
Empirical rovibrational energy levels for nitrous oxide J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-19 Jonathan Tennyson, Tibor Furtenbacher, Sergei N. Yurchenko, Attila G. Császár
A survey of the huge number of measured rovibrational transitions of the 14N216O isotopologue of nitrous oxide is performed which either confirms the positions, the assignments, and the uncertainties of the measurements or refutes at least one of them. Data from 95 literature sources are analyzed and their assignments adjusted to a uniform set of polyads and associated counting numbers. This is an
-
Calculations of energy levels, transition rates, lifetimes and Landé g factors for silicon-like Kr XXIII J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-19 Si Jie Wu, Bi Shuang Yan, Ran Si, Kai Wang, Chong Yang Chen
The multiconfiguration Dirac–Hartree–Fock (MCDHF) method is employed to calculate excitation energies, transition rates, lifetimes and Landé g factors for the lowest 700 levels belonging to the 22 configurations 3s23p{3l,4l′}, 3s3p2{3l,4l′}, 3s23d{3d,4s,4p}, 3s{3p3d2,3d3}, 3p{3p3,3p23d,3p3d2,3d3}, 3d4 with l = 1, 2 and l′ = 0, 1, 2, 3 in Kr XXIII. The present excitation energies are compared with
-
Vibrational resonance phenomena of the OCS isotopologues studied by resummation of high-order Rayleigh–Schrödinger perturbation theory J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-18 Egor O. Dobrolyubov, Igor V. Polyakov, Dmitry V. Millionshchikov, Sergey V. Krasnoshchekov
-
Investigation on the fine and hyperfine structure of the c3Σ+ state in KRb J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-17 V. Stoyanov, A. Pashov
The hyperfine structure of the transitions in the (X,v′′=0→(B,c),v′=2) band system in 39K85Rb and 39K87Rb is studied by using several selective Doppler-free spectroscopy techniques. Significant splitting of the line profiles is observable for the B1Π state levels coupled to the c3Σ+ levels through spin–orbit interactions. The splitting is the result from an interplay between spin–spin, spin–rotation
-
Hyperfine structure and even-parity new levels evaluation in the holmium atom J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-12 B. Furmann, M. Klempka, S. Mieloch, D. Stefańska
In this work investigations of the hyperfine structure for more than 100 spectral lines of the holmium atom are presented, performed with laser excitation in a hollow cathode and detection of laser induced fluorescence. Energy values and the hyperfine structure constants A and B for 11 new electronic levels were determined. Hyperfine structure constants were evaluated for 26 even-parity levels with
-
Visible-to-near-infrared asymmetric transmission through a cross grating J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-09 Cunhai Wang, Mingxiang Liu, Zeyi Jiang
Broadband asymmetric transmission (BAT) structures are in high demand for optical devices, computing, and thermal management. While achieving asymmetric transmission in a broad waveband remains challenging. In this work, we propose a simple cross grating made of SiO2 and silver (Ag) and demonstrate its ability to asymmetrically transmit visible-to-near-infrared radiation. Results indicate that the
-
A successive-order-scattering solution of the hemispherical harmonic decomposed radiative transfer equations J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-09 Biao Wang
In this work, we applies the successive-order-scattering (SOS) method to the generally decomposed radiative transfer equations (GD-RTEs). The basic equations is presented and a numerical model is developed specifically to solve the hemispherical harmonic components of radiance. The numerical results are checked against those of the hemispherical harmonics method to validate the model and to investigate
-
A discrete cosine transform-based rapid algorithm for high-resolution, full-spectrum calculations over inhomogeneous gas paths J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-13 Sudarshan P. Bharadwaj
An accurate and rapid line-by-line (LBL) calculation method1 was developed, which achieves 1010 to 1013 line-spectral positions per second (including the time for disk file reads and writes) without GPU acceleration. The method is 103 to 106 times faster than traditional LBL calculations. The current method overcomes limitations of earlier fast spectral synthesis methods, which relied on fast Fourier
-
Combined effect of algae and dust on snow spectral and broadband albedo J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-13 B. Di Mauro, R. Garzonio, C. Ravasio, V. Orlandi, G. Baccolo, S. Gilardoni, D. Remias, B. Leoni, M. Rossini, R. Colombo
The optical properties of snow can be strongly modified by the presence of a variety of impurities including mineral dust and snow algae. We made use of measured concentration of snow algae and mineral dust to parameterize the BioSNICAR radiative transfer model. Surficial snow samples were gathered during a field campaign on 7th July 2020 at the Presena glacier (Rhaetian Alps). We collected 18 samples
-
Analysis of the high resolution absorption spectrum of ethylene between 5800 and 6400 cm−1 J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-12 O. Ben Fathallah, M. Rey, A. Campargue
-
New acetylene line list near 3.8-μm - Part III - 12C13CH2 and 12C2HD J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-12 D. Jacquemart, O.M. Lyulin, A.M. Solodov, T.M. Petrova, A.A. Solodov
-
Laser optogalvanic spectroscopy of lead lines — Isotope shifts and hyperfine structure studies J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-11 Ł.M. Sobolewski, S. Rathi, L. Sharma, L. Windholz, J. Kwela
Six atomic lines of Pb I in the 569–612 nm wavelength range and two lines of Pb II in the wavelength range of 560-608 nm were examined using optogalvanic spectroscopy. A hollow cathode discharge lamp was the source of Pb atoms and ions. Hyperfine structure constants were measured for levels associated with the observed transitions. The result of the research was also the determination of isotope shifts
-
Empirical rovibrational energy levels for methane J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-11 Kyriaki Kefala, Vincent Boudon, Sergei N. Yurchenko, Jonathan Tennyson
A Marvel (Measured Active Rotational Vibrational Energy Levels) analysis of the available spectroscopic data on methane (12C1H4) is performed. A total of 82173 measured rovibrational transitions were gathered from 96 literature sources and put through the Marvel procedure which led to the determination of 23292 empirical energy levels with uncertainties, up to 9900 cm−1 covering the lowest eight polyads
-
Modified Complex Robert-Bonamy calculations of line shape parameters for the CO2-H2O collision system J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-09 Bastien Vispoel, Robert R. Gamache
-
Monte Carlo functional estimation of the radiative source term in a semi-transparent medium: A faster coupled conductive–radiative model resolution J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-09 Léa Penazzi, Olivier Farges, Yves Jannot, Johann Meulemans, Vincent Schick
The estimation of thermo-physical properties of materials at high temperatures requires the development of robust and fast-enough direct models that takes into account the strong coupling between conduction and radiation. The interest in using the Monte Carlo method to obtain a conduction–radiation model in a semi-transparent material solved in a reduced computational time is addressed in this study
-
Professor James Albert Lock (1948–2023): A life of honor and work of excellence J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-05 Gérard Gouesbet, Feng Xu, Philip L. Marston
In this obituary, the life and work of Professor James Albert Lock is summarized (if it is possible to summarize a life spanning more than seven decades and work presented in about 200 communications, including 160 refereed papers). The charming, peaceful and friendly personality of “Jim” (as he wished/liked to be called by his relatives, family and friends) is best described by personal recollections
-
Extended calculations of energy levels, radiative properties, and lifetimes for oxygen-like Ge XXV J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-02 Xu Zu, Wei Zheng, Kai Wang, Ran Si, Wei Dang, Xiao Hui Zhao, Chong Yang Chen, Jun Yan
The calculations are performed for the lowest 427 fine-structure levels arising from the 2s22p4, 2s2p5, 2p6, 2s22p3nl (n=3−4, l≤n−1), 2s2p4nl (n=3−4, l≤n−1), and 2p5nl (n=3, l≤n−1) configurations in O-like Ge XXV using two state-of-the-art methods, namely the many-body perturbation theory (MBPT) method and the multiconfiguration Dirac–Hartree–Fock (MCDHF) method. A comprehensive set of atomic data
-
Electron-impact single ionization for the N2+ and N3+ ions J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-06 A. Kynienė, Š. Masys, V. Jonauskas
Electron-impact ionization cross sections are investigated for the ground levels of N2+ and N3+ ions. Additionally, the long-lived energy levels of the N2+ 2s2p2 and N3+ 2s2p configurations are analyzed. Study includes both direct and indirect ionization processes. Contribution of the excitation–autoionization (EA) channels to the ionization cross sections is approximately 15% to 23% for both ions
-
Non-Lambertian snow surface reflection models for simulated top-of-the-atmosphere radiances in the NIR and SWIR wavelengths J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-02 Antti Mikkonen, Hannakaisa Lindqvist, Jouni Peltoniemi, Johanna Tamminen
Accurately modeling snow reflectance is one way to improve satellite observations in the high-latitude regions. Snow surfaces are known to be challenging for atmospheric retrievals in the short-wave infrared (SWIR) wavelength regime due to their low reflectance. For example, current algorithms for satellite-based remote sensing of atmospheric carbon dioxide (CO2) do not take into account the unique
-
-
Ab initio MCDHF/RCI calculations of mass- and field shifts isotopes parameters of the 1s21S0 − 1s2p1P1o and 1s21S0 − 1s2p3P0,1,2o transitions in He-like ions for the sequence 2 ≤ Z ≤ 83 J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-01-02 Sirine Ben Nasr, Soumaya Manai, Dhia Elhak Salhi, Haikel Jelassi
Based on the multiconfiguration Dirac-Hartree–Fock method, the field shift and mass shift parameters of the 1s21S0 − 1s2p1P1o and 1s21S0 − 1s2p3P0,1,2o transitions in He-like ions for the sequence 2 ≤ Z ≤ 83 are calculated with high precision. The total value of the isotope shift is determined by the sum of the mass- and field- shifts. With the inclusion of the Breit interaction and the leading QED
-
Effects of density distribution on the Stark width and shift of spectral lines in plasma J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2023-12-27 Evgeny Stambulchik, Yitzhak Maron
A plasma density distribution that arises due to a finite observation volume or is inherent due to turbulence, needs to be accounted for when using spectral lines for plasma diagnostics. Such a distribution distorts line shapes in a non-trivial way and alters their intensities. In the present study, these effects are analyzed. The results are presented analytically and also tabulated for two types
-
Spectroscopic heat maps reveal how to design experiments to improve the uncertainties of transitions and energy levels present in line-by-line databases J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2023-12-30 Péter Árendás, Tibor Furtenbacher, Attila G. Császár
-
New gas radiation model of high accuracy based on the principle of weighted sum of gray gases J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2023-12-28 Fatmir Asllanaj, Sylvain Contassot-Vivier, Guilherme C. Fraga, Francis H.R. França, Roberta J.C. da Fonseca
The standard WSGG (Weighted Sum of Gray Gases) model is very fast and simple but can lead to relatively high discrepancies in the computation of the radiative heat transfer. A new model of high accuracy relying on the principle of the WSGG model is proposed. Contrary to the standard WSGG model, the pressure absorption coefficient depends here weakly on the temperature while the weighting factor is
-
High-altitude demonstration of LWIR polarimetry using uncooled microbolometers J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2023-12-21 Kira A. Shanks, Jaclyn A. John, Jeremy C. Parkinson, Dong L. Wu, Meredith K. Kupinski
An Infrared Channeled Spectro-Polarimeter (IRCSP) was successfully demonstrated in a near-space environment on a high-altitude balloon mission out of the NASA Columbia Scientific Balloon Facility in August 2021. The compact IRCSP is sensitive to linearly polarized thermal radiation between 7-12μm and targets polarized cloud top scattering. The IRCSP comprises a series of polarization modulation components