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Radiative properties of spherical microalgae synergically considering optical constants of organelle and internal structure of cell J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-07-08 Li Lin, Miao Jiang, Zeguo Shang, Jinyuan Lv, Xingcan Li, Lanxin Ma, Jia-Yue Yang
The radiation characteristics of microalgae are of great significance for the design of photobioreactors and ocean optical remote sensing. The complex structure of microalgae makes it difficult to theoretically calculate its radiation characteristics. Herein, the spherical microalgae cells are modeled, considering the shape of cells similar to the spherical cell microstructure, and a heterogeneous
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The wide spectral range characteristics and dynamic evolution of laser-produced tin plasmas J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-07-06 Yaqing Gao, Maogen Su, Siqi He, Haidong Lu, Xingbang Liu, Yanhong Wu, Shiquan Cao, Qi Min, Duixiong Sun, Chenzhong Dong
The energy levels and transitions of highly charged Sn ions are key data for analyzing emission spectra, radiative opacity, and conversion efficiency of laser-produced Sn plasmas. Temporally–resolved spectra in the 6–45-nm range were acquired via high-precision, spatio–temporally resolved techniques. In addition, the Cowan code, based on Hartree–Fock multi-configurational interactions, was used to
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Three approaches on estimating geometric sensitivities in radiative transfer with Monte Carlo J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-07-05 Zili He, Paule Lapeyre, Stephane Blanco, Eugene d’Eon, Simon Eibner, Mouna El Hafi, Richard Fournier, Maxime Roger
The Monte Carlo method, renowned for its ability to handle the spectral and geometric complexities of 3D radiative transfer, is extensively utilized across various fields, including concentrated solar power design, atmospheric science, and computer graphics. The success of this method also extends to the estimation of sensitivity—the derivative of an observable with respect to a given system parameter
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Spectral bidirectional reflectance measurement of packed pure gypsum grains J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-07-02 Changhao Ni, Yuxue Sun, Hao Zhang, Yujin Huang
Gypsum, a typical hydrous calcium sulfate, has been found in some carbonaceous chondrites with aqueous alterations and has also been identified on Mars using visible and near-infrared (VNIR) reflectance spectra measured by orbiting and in-situ sensors. Therefore, gypsum may exist on more extraterrestrial bodies that have undergone hydration processes. Due to the dependence of spectral features on illumination
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On the retrieval of cloud optical thickness from spectral radiances - A sensitivity study with high albedo surfaces J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-30 Filippo Calì Quaglia, Giovanni Muscari, Daniela Meloni, Annalisa Di Bernardino, Tatiana Di Iorio, Giandomenico Pace, Sebastian K. Schmidt, Alcide di Sarra
Measurements of spectral zenith radiance in the 320–950 nm wavelength range have been carried out since 2021 at the Thule High Arctic Atmospheric Observatory (THAAO, , 76.5° N, 68.8° W, 225 m a.s.l) located in Pituffik, northern Greenland. This study evaluates whether such observations could provide, in principle, scientifically meaningful cloud optical depth (τ) estimates, what would be the limitations
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View factor of a spheroid and an ellipse from a plate element J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-29 Kaname Sasaki
A view factor is a fundamental parameter for evaluating radiative heat transfer between two surfaces. View factors for various geometries have been investigated in the past studies. However, the view factors of a spheroid and an ellipse are known only for limited configurations. In this study, the analytical view factor expressions of an ellipse and a spheroid from a plate element are derived. The
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The 2024 release of the ExoMol database: Molecular line lists for exoplanet and other hot atmospheres J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-27 Jonathan Tennyson, Sergei N. Yurchenko, Jingxin Zhang, Charles A. Bowesman, Ryan P. Brady, Jeanna Buldyreva, Katy L. Chubb, Robert R. Gamache, Maire N. Gorman, Elizabeth R. Guest, Christian Hill, Kyriaki Kefala, A.E. Lynas-Gray, Thomas M. Mellor, Laura K. McKemmish, Georgi B. Mitev, Irina I. Mizus, Alec Owens, Zhijian Peng, Armando N. Perri, Marco Pezzella, Oleg L. Polyansky, Qianwei Qu, Mikhail Semenov
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Expression of the anisotropy factor of fractal aggregates to enable their characterization using photon density wave spectroscopy J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-26 Sebastian Zimmermann, Jon Scouten, Oliver Reich, Marvin Münzberg
This work aims at expanding the applicability of photon density wave spectroscopy (PDWS) to in-situ characterization of dispersed aggregates of spherical primary particles. For this purpose, an approximate optical model within the Rayleigh-Debye-Gans-theory was developed that links the experimentally determined reduced scattering coefficients with the fractal dimension and the radius of gyration of
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Investigation of spectral bands and sensor parameters for methane emission detection imaging spectrometer J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-22 Hasmukh K. Varchand, Mehul R. Pandya, Jalpesh A. Dave, Parthkumar N. Parmar, Dhiraj B. Shah, Vishal N. Pathak, Manoj Singh, Dhruv D. Desai, Himanshu J. Trivedi
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Investigation of the M1 transitions from the ground configuration of W23+ J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-22 B.L. Li, F.H. Qu, K. Wang, Y.M. Xie, X. Liu, X.W. Zhang, B. Niu, K. Yao, Y. Yang, B. Wei, Y. Zou, J. Xiao
To extend the research on the atomic structure of tungsten ions with an open 4-shell, we conducted an investigation into the M1 transitions originating from the ground configuration of W using the SHHtscEBIT in the 420–600 nm range. Three different calculational methods, including the relativistic configuration interactions (RCI) and the relativistic many-body perturbation theory (RMBPT) implemented
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First assignments of the 6ν4, ν2+5ν4, and ν1+4ν4 Triacontad band system of 12CH4 in the 7606-7919 cm−1 region J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-19 A.V. Nikitin, M. Rey, A. Campargue, V.G. Tyuterev
Quantum assignments are reported for 1382 transitions towards 33 vibrational sub-levels belonging to three weak Triacontad bands 6ν, ν+5ν, ν+4ν of CH 1.28µm. Empirical values of the origins of the corresponded sub-bands were determined for the first time from high resolution spectra analysis. The positions of all assigned lines were fitted to a model adopting an effective Hamiltonian whose initial
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Trends in atmospheric composition between 2004–2023 using version 5 ACE-FTS data J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-18 Matthew Schmidt, Peter Bernath, Chris Boone, Michael Lecours, Johnathan Steffen
The Atmospheric Chemistry Experiment (ACE) is a satellite mission that has been in orbit since 2003. The primary instrument on ACE is a Fourier transform spectrometer (FTS) that records infrared atmospheric transmittance spectra in the limb geometry using the Sun as a light source. Version 5 of ACE-FTS data processing contains improved volume mixing ratio (VMR) profiles for 46 molecules and 24 isotopologues
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Conduction-radiation heat transfer in non-gray semi-transparent planar media: Combining integral transforms and discrete ordinate method J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-18 João A. de Lima, Zaqueu E. da Silva, José Vanderlan L. de Oliveira
This work presents a hybrid approach to solve the unsteady one-dimensional coupled heat conduction-radiation problem in a non-gray semitransparent planar medium. The diffusely absorbing/emitting medium scatters radiation anisotropically and is bounded by two gray or non-gray parallel planar surfaces that are diffuse in emission and diffuse or specular in reflection. A combination of the Discrete Ordinate
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Temporal distributions of aerosols over the Horn of Africa–Ethiopia using MODIS satellite data: Part 01 J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-16 Ambachew Abeje Alemu, Jaya Prakash Raju
There are large temporal variations in the optical properties and types of aerosols. These are due to the effects of environmental and meteorological conditions, industrial and agricultural influences, and other human influences and natural factors in each ecological functional area. Aerosol optical depth AOD and Ångström exponent AE parameters were extracted from the Moderate Resolution Imaging Spectroradiometer
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New line list for the ν4 bands of the trans (790.117 cm–1) and cis (851.943 cm–1) conformers of nitrous acid (HONO): Accurate positions and absolute intensities J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-14 W. Tchana Betnga, A. Perrin, L. Manceron, J. Vander Auwera, F. Hindle, A. Cuisset, G. Mouret, R. Bocquet, P. Roy, X. Landsheere, A. Voute, F. Kwabia Tchana
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Deterministic and stochastic approaches for the modeling of conduction-radiation coupling within non-Beerian semi-transparent media J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-14 Loïc Seyer, Franck Enguehard, Denis Rochais
This article presents two very different models for the resolution of conduction-radiation coupling within grey Beerian and non-Beerian semi-transparent slabs enclosed between two black surfaces imposing their intensities and temperatures. The first model is deterministic, based on finite differences and discrete ordinates. The second one is fully stochastic, using Monte Carlo ray tracing for the modeling
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Zn IV line widths in hot white dwarf atmospheres G191[formula omitted]B2B: Quantum results J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-13 R. Aloui, H. Elabidi, S. Sahal-Bréchot
Missing Stark widths for 30 spectral lines of zinc ion (Zn IV) have been calculated using our quantum mechanical method. Recently, 21 Zn IV lines among the considered lines have been newly detected in the UV spectrum of the hot white dwarf G191B2B (DA type). This recent discovery encourages us to calculate their Stark widths to fill the lack of the data base STARK-B and for use in investigations of
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Energy levels, oscillator strengths, transition probabilities and lifetimes of the O-like Cl X ion J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-07 Reem Al Salamah, Lamia Abu El Maati, Abubaker Siddig, Nabil Ben Nessib, Milan S. Dimitrijević
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Fine- and hyperfine structure semi-empirical studies of atomic cobalt. Odd-parity configurations system J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-07 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 odd-parity level system of Co I, using all available experimental data. Our analysis incorporates all electromagnetic interactions within the atom, including effective electrostatic interactions and electrostatically correlated spin–orbit interactions, as well as
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Atomic structure, electron-impact excitation and collisional-radiative modelling for Ar II J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-06 N.E. McElroy, C.A. Ramsbottom, C.P. Ballance, N.R. Badnell, M.G. O’Mullane, S.D. Loch, E.N. Williamson
The spectra from singly ionized argon Ar II has significant diagnostic capability in the characterization and modelling of both magnetically-confined fusion and astrophysical plasmas. The literature has several pre-existing data sets for Ar but this paper presents the results from 3 new atomic structure and electron-impact scattering models in order to better constrain the differences in atomic data
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Accurate ab initio calculation and neural network prediction of the atomic properties of Os LXXIII, Ir LXXIV, Pt LXXV, and Au LXXVI J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-03 Zhan-Bin Chen
In this paper, we present an ab initio theoretical calculation of the atomic parameters, including energy levels, wavelengths, lifetimes, and transition parameters, associated with the 12 and 12 ( 2–4, −1) configurations of Be-like sequence: Os LXXIII, Ir LXXIV, Pt LXXV, and Au LXXVI. Our analysis is based on the relativistic wavefunctions derived from the multi-configuration Dirac–Fock (MCDF) method
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CO[formula omitted] collision-induced line parameters for the [formula omitted] band of 12CH[formula omitted] measured using a hard-collision speed-dependent line shape and the relaxation matrix formalism J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-03 T. Bertin, J. Vander Auwera
Ten high resolution Fourier transform spectra of the pentad region near of methane diluted in carbon dioxide at total pressures up to 800 hPa have been recorded at K. Including a high resolution spectrum of pure methane at low pressure, these spectra have been analyzed using multi-spectrum fitting techniques. The methane lines were modeled using hard-collision speed-dependent line profiles and line
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Theoretical study of low-lying electronic states of BiN, BiP, BiAs, and BiSb J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-03 Wen Yan, Kai Wang, Wenli Zou
For the pnictogen atoms, the first two levels and may couple together through the spin–orbit coupling (SOC) effects with the aid of the third level , leading to a complicated computational procedure to take SOC into account. In this work, we theoretically study the low-lying valence states of BiPn (Pn = N, P, As, and Sb), where 102 -S states from nine dissociation asymptotes split into 242 states.
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Jet-cooled ethylene cavity ring-down spectroscopy between 5880 and 6200 cm−1 J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-06-02 Solène Perot, Julien Lecomte, Nicolas Suas-David, Lucile Rutkowski, Michaël Rey, Samir Kassi, Andrei V. Nikitin, Robert Georges
Absorption spectra of jet-cooled ethylene (ethene, CH) are recorded at three different rotational temperatures (6/8 K, 12 K, 38 K) using cavity ring-down spectroscopy (CRDS) in the 5880–6200 cm spectral region. Rotational cooling is used to determine the various vibrational band centers by simplifying drastically the rotational band structure. A line-by-line assignment, based on a direct comparison
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Investigation of soot formation and agglomeration in ethylene/air jet diffusion flame with rank correlated SLW model J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-31 Berkay Halvaşi, Altuğ M. Başol, Özgür Ertunç, M. Pınar Mengüç
Effect of radiation transfer is significant part of the overall heat transfer mechanism in sooting flames. The interaction between radiation transfer and soot formation considerably affects the combustion regime and the system efficiency. Spectral radiation models that account for the radiative effects of sooting flames need to be explored in detail to understand this phenomenon. This study numerically
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Experimental study of near-field radiative heat transfer between large-area polar dielectric films J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-31 Song Li, Deyu Xu, Chengxin Hou, Junming Zhao, Linhua Liu
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Improved effective dipole moment model for axially symmetric [formula omitted] molecules: Parallel [formula omitted] bands J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-31 Oleg N. Ulenikov, Elena S. Bekhtereva, Olga V. Gromova, Sergey S. Sidko, Sigurd Bauerecker
The new improved effective dipole moment model is derived for molecules of the axial C symmetry. The obtained result is, on the one hand, of the same order of efficiency but much simpler and clearer in applications in comparison with previous models derived on the basis of the irreducible tensorial sets theory and, on the other hand, mathematically more correct in comparison with concepts like the
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Effects of surface coating on the shortwave and longwave radiative effects of dust aerosol in comparison with external mixing: A theoretical study J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-31 Zhibo Zhang, Qianqian Song, Jianyu Zheng, Hongbin Yu
Dust particles can be coated with a surface layer of pollutants such as sulfate and nitrate after mixing with local pollution during long-range transport. Previous studies investigated the effects of surface coating on scattering properties and direct radiative effects (DRE) of dust in the solar shortwave (SW) spectral region. In this research, we carried out a theoretical study of the surface coating
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LED-based Fourier transform absorption spectroscopy of HD17O in 13,165–14,060 cm−1 spectral region J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-30 I.A. Vasilenko, L.N. Sinitsa
The high-resolution absorption spectrum of HDО has been recorded for the first time in the range of 13,165–14,060 cm on a LED-based IFS-125 M Fourier transform spectrometer with a spectral resolution of 0.02 cm, at a pressure of 29 millibars and optical path length of 3480 cm. An EDEN-1L53-R LED was used as the radiation source that provided a high signal-to-noise ratio and enabled weak absorption
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Scattering matrices of particle ensembles analytically decomposed into pure Mueller matrices J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-28 Karri Muinonen, Antti Penttilä
Scattering matrices of particle ensembles are analytically decomposed into sums of pure Mueller matrices. The ensembles are assumed to have equal numbers of particles and their mirror particles, both in random orientation. In the general case, there are four pure Mueller matrices in the decomposition. In the present spectral decomposition, of these four matrices, there is a single matrix that qualifies
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On the impact of radiative transfer in fluorescence imaging of bacterial films and suspensions J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-27 Joshua M. Herzog, Gianna Agosta, Volker Sick
Fluorescence imaging and spectroscopy are convenient, rapid, and simple methods to analyze chemical samples including biological materials such as bacterial biofilms and suspensions. In principle, these techniques could be used to diagnose or discriminate between infectious bacteria in infections of the skin or ocular surface (, MK). However, the extension of these techniques to macroscopic turbid
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Propagation of elliptical Gaussian vortex beam based on angular spectrum representation J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-27 Jianxin Lin, Shiliang Zhong, Jianqi Shen
Vortex beams with hollow elliptical ring structure have attracted broad interest in applications such as micro-particle trapping and manipulation. The paper investigates the dependence of the hollow elliptic ring structure of vortex beams on the beam order and the topological charge, while propagating in the near- and far-field zones. The electric field of the beam is formulated by using the angular
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Antarctic polar stratospheric cloud composition as observed by ACE, CALIPSO and MIPAS J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-25 Léo Lavy, Peter Bernath, Michael Lecours, Dylan English
The composition of polar stratospheric clouds (PSCs) in the Antarctic is measured by infrared absorption spectroscopy by the Atmospheric Chemistry Experiment (ACE) satellite and compared to lidar (CALIPSO) and emission spectroscopy (MIPAS) results. ACE observations are compared first to CALIPSO for the period 2006–2020, then to MIPAS for the period 2005–2011, and then a set of triple coincidences is
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FT-UV emission spectroscopy of the [formula omitted] progression bands of the [formula omitted] system of [formula omitted]C[formula omitted]O[formula omitted] J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-25 Wojciech Szajna, Ryszard Kȩpa, Robert W. Field, Rafał Hakalla
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Atmospheric effects of the Tonga volcanic sulfate aerosols J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-23 Neil Raymond, Peter Bernath, Chris Boone
The eruption of Hunga Tonga–Hunga Ha’apai (Tonga for short) is of significant interest, particularly due to the impact of sulfate aerosols on stratospheric chemistry. We report on ACE-FTS measurements of changes in the abundances of stratospheric molecules post-Tonga: 2022–Aug 2023. Observed variations in ozone levels within the Southern Hemisphere show evidence of being influenced by competing NO
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The pressure dependence of the experimentally-determined line intensity and continuum absorption of pure CO2 in the 1.6µm region J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-22 M. Birk, C. Röske, G. Wagner
Fourier-transform measurements of pure CO spectra in the 1.6 µm region covering bands from the ground state to the 30011, 30012, 30013, and 30014 states at ambient temperature and 212 K with pressures up to 1 atm have been recorded. The measured spectra have been multispectrum-fitted with the Hartmann-Tran model with first order line-mixing taken into account. In the fits, a linear decrease of the
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Optimization of highly circularly polarized thermal radiation in α-MoO3/β-Ga2O3 twisted layers J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-22 Marco Centini, Chiyu Yang, Maria Cristina Larciprete, Mauro Antezza, Zhuomin M. Zhang
We investigate a bi-layer scheme for circularly polarized infrared thermal radiation. Our approach takes advantage of the strong anisotropy of low-symmetry materials such as β-GaO and α-MoO. We numerically report narrow-band, high degree of circular polarization (over 0.85), thermal radiation at two typical emission frequencies related to the excitation of β-GaO optical phonons. Optimization of the
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On the use of spherical harmonic approximations in nonclassical particle transport problems J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-21 S.A. Agbo, L.R.C. Moraes, R. Vasques
Presented here is the application of the spherical harmonic expansion to the nonclassical transport equation to derive a system of equations for the nonclassical flux moments, namely nonclassical spherical harmonic approximations (NSHA). The nonclassical transport equation is a recently developed mathematical model that allows the modeling of transport problems wherein the particle flux does not undergo
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How machine learning approaches are useful in computing the optical properties of non-spherical particles across a broad range of size parameters? J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-21 Lei Bi, Yue Xi, Wei Han, Zhenhong Du
This study investigates the use of machine learning techniques, specifically deep neural networks (DNN), to compute the optical properties of non-spherical particles across a wide range of size parameters. The approach involves training a DNN using a T-matrix database of super-spheroids with size parameters below 50. The DNN is then able to predict optical properties for size parameters beyond this
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Scattering properties of dual Bessel beams on chiral layered particle J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-20 Jing Bai, Yu Gao, Cheng-Xian Ge, Zhen-Sen Wu, Quan Yuan
The paper investigates the scattering analytical solution of arbitrary direction double zero-order Bessel beams (ZOBBs) incident on a non-uniform layered chiral sphere. Using the generalized Lorenz-Mie theory (GLMT), the electromagnetic field expansion expression of the double ZOBBs is obtained through the vector superposition of the spherical vector wave functions (SVWFs). Analytical solutions of
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A light scattering model for large particles with surface roughness J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-19 H. Ballington, E. Hesse
A physical-optics hybrid method designed for the computation of single-scattering properties of particles with complex shapes, including surface roughness, is presented. The method applies geometric optics using a novel ray backtracing algorithm to compute the scattered field on the particle surface. A surface integral equation based on the equivalence theorem is used to compute the scattered far-field
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Photonic hook generation under an electric dipole from a dielectric micro-cylinder J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-19 Song Zhou, Fang Qian, Yimin Wang, Igor V. Minin, Oleg V. Minin
In this paper, we numerically investigate a photonic hook (PH) generated by a dielectric micro-cylinder illuminated under an electric dipole using the finite element method. At first, we show the properties of the photonic nanojet (PNJ) produced by the micro-cylinder under an electric dipole. Then, we find that a PH can be obtained when the electric dipole is moved at a certain distance along the direction
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Modeling the optical properties of forsterite particles using different irregularly shaped particles J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-17 Evgenij Zubko
Light scattering by four different types of irregularly shaped particles with refractive index = 1.6 + 0.0005 is investigated over a wide range of size parameter = 1–48 calculated by means of the discrete dipole approximation. The packing density of the constituent materials varies by a factor of ∼4.6 between the densest morphology of the pocked spheres and the fluffiest morphology of the loose clusters
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A method for generating quantitative vapor-phase infrared spectra of solids: results for phenol, camphor, menthol, syringol, dicyclopentadiene and naphthalene J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-16 Matthew D.W. Schneider, Tracy J. Baker, Nicole K. Scharko, Thomas A. Blake, Russell G. Tonkyn, Brenda M. Forland, Timothy J. Johnson
A method is presented to generate quantitative vapor-phase infrared spectra from substances that naturally occur as solids with moderate volatility. The solid is gravimetrically dissolved into a solvent that has few infrared spectral features, typically CS and CCl separately. The solution is flowed at a constant rate from a linearly pumped syringe into a metered stream of nitrogen carrier gas regulated
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Deep-ultraviolet absorption cross sections of strongly absorbing atmospheric species J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-15 Meng Wang, Sean C. Connolly, Dean S. Venables
Absorption of deep-ultraviolet photons gives rise to intense vibronic transitions in molecules and can be exploited for sensitive and selective quantification of trace gases. Accurate absorption cross sections at appropriate resolution are essential for such applications, but are not well characterised for even major atmospheric species like nitric oxide (NO) and key biogenic and anthropogenic volatile
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Erratum to the paper “LED-based Fourier transform spectroscopy of 14N216O in the 9750–12,050 cm−1” by L.N. Sinitsa, V.I. Serdyukov, N.M. Emelyanov, A.A. Marinina, and V.I. Perevalov [J. Quant. Spectrosc. Radiat. Transf. 315 (2024) 108,888] J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-05 L.N. Sinitsa, V.I. Serdyukov, N.M. Emelyanov, A.A. Marinina, V.I. Perevalov
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Influence of porosity on the Umov effect in silicate and organic refractory aggregates J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-03 B. Goswami, H.S. Das, N.N. Devi, P. Halder
This study investigates the influence of porosity on the Umov effect, a phenomenon observed in the scattering of light from celestial objects. The Umov effect describes an inverse relationship between the degree of linear polarization and the object’s reflectance (geometric albedo). To study the dependence of porosity on the Umov effect, a wide range of porosity (i.e., from 0.64 to 0.99) is considered
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A Bayesian error model for quantifying methane and carbon dioxide column densities from hyperspectral measurements J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-03 Paule Lapeyre, Rodrigo Brenner Miguel, Kyle Daun
Many industrial combustion emissions may be detected and quantified using imaging Fourier transform spectrometers (IFTSs). Unlike a conventional infrared camera, which generates a single image integrated over a spectrum, IFTSs generate a datacube of images, each at a distinct wavenumber. The resulting intensity spectra may be used to identify the species within the plume and map their column density
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Theoretical and experimental study of modulation transfer spectroscopy for non-cycling transitions of Rb D1 lines J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-05-03 Shabraz Khan, Aisar-ul Hassan, Heung-Ryoul Noh, Jin-Tae Kim
Modulation transfer spectroscopy (MTS) of the D1 transitions of Rb and Rb atoms with only non-cycling transitions have been investigated theoretically and experimentally using the density matrix equation for four different polarization configurations: linear orthogonal (linlin), linear parallel (lin lin), circular orthogonal (), and circular parallel (). MTS signals for the transition of Rb atom and
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A new development for the WBW model at elevated pressure levels J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-30 Roberta J.C. da Fonseca, Guilherme C. Fraga, Fatmir Asllanaj, Francis H.R. França
This paper proposes an approach to obtain correlations for high pressure conditions for the weighted-sum-of-gray-gases (WSGG) model. The proposed formulation, which extends the wide-band based WSGG (WBW) model, entails solving the gray gas coefficients by partitioning the spectrum into a series of spectral intervals, and then using the classic version of the WSGG model to individually solve each segment
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A simplified ω-ALDF rank-correlated full-spectrum k-distribution model for combustion applications J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-30 Jean-Louis Consalvi, Fatiha Nmira, Frédéric André, Vladimir P. Solovjov, Brent W. Webb
The objective of this paper is to present a method that allows simplifying the use of -absorption line distribution functions (ω-ALDF) inside rank correlated full-spectrum -distribution (RCFSK) models for application in combustion problems. In this simplified version, the -ALDF is constructed without any information on the problem treated. It can be used directly but, in order to simplify further the
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The effects of changes in HITRAN and the water vapor continuum model on infrared radiative transfer calculations and remote sensing applications J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-27 Maria Lívia L.M. Gava, Simone M.S. da Costa, Caio Atila P. Sena
This study examines the implications of recent updates to the High Resolution Transmission (HITRAN) database and the MT_CKD water vapor continuum model on infrared radiative transfer calculations and satellite remote sensing applications. Specifically, it assesses the impact of the latest versions of the HITRAN database (i.e. HITRAN2016 and HITRAN2020) and the MT_CKD WV continuum model (i.e. versions
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Measurements of H2O broadened by CO2 line-shape parameters: Beyond the Voigt profile J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-26 É. Ducreux, B. Grouiez, S. Robert, M. Lepère, B. Vispoel, R.R. Gamache, L. Régalia
HO is an important molecule in the quest to better understand the evolution of solar system. In the study of Venus and Mars CO-rich atmospheres (around 96 % of their composition) and because of the space instruments constant improvements, the planetary community needs spectroscopic data as accurate as possible.
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Electron impact broadening and atomic data for As IV-V, Mo V and In V spectral lines J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-26 R. Aloui, H. Elabidi, M.S. Dimitrijević, S. Sahal-Bréchot
Missing Stark broadening parameters for 33 spectral lines of several arsenic, molybdenum and indium ions (7 As IV, 4 As V, 12 Mo V and 10 In V lines) have been calculated using a quantum-mechanical method. All the considered spectral lines for As IV and As V have been detected for the first time in the atmospheres of cool DO white dwarfs HD 149499 B and p=HZ 21, these four As V lines that have been
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Band-wise assessment of turbulence–radiation interaction in the prediction of mean and filtered radiative quantities J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-25 Guilherme Crivelli Fraga, Pedro Jorge Coelho, Xinyu Zhao
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Analysis of the rotationally-resolved 3.3 µm region of C2H4 in natural isotopic abundance J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-24 O. Ben Fathallah, J. Vander Auwera, M. Tudorie, V. Boudon, C. Richard, M.A. Loroño-Gonzalez, H. Aroui, M. Rotger
Ethylene (or ethene) is a natural gas compound present in our atmosphere but also in the atmospheres of outer solar system planets such as Jupiter, Saturn, Uranus, Neptune and Saturn's moon Titan. However, a better knowledge of spectroscopic parameters is needed for this molecule in order to detect its presence and/or to derive its accurate concentration. We present here a detailed analysis and modeling
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Cascade energy reemission by the iodine atom irradiated by 0.01–100 keV photons. Role of photo- and cascade-produced electrons in radiosensitization using iodine-containing agents J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-24 A.P. Chaynikov, A.G. Kochur, A.I. Dudenko
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Gray gas emissivities and absorptivities for H2O[sbnd]CO2[sbnd]CO[sbnd]N2 mixtures J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-24 Michael Alberti, Roman Weber, Marco Mancini
Our previously published EXCEL program for the calculation of gray gas emissivities for HOCOCON mixtures is extended to the calculation of gray gas absorptivities (see Supplementary Material).
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A light scattering analysis of the cryovolcano plumes on enceladus J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-23 Claudia Morello, Matthew J. Berg
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Propagation characteristics of the Bessel-Gaussian beams in turbulent plasma sheath surrounding the hypersonic aerocraft J. Quant. Spectrosc. Radiat. Transf. (IF 2.3) Pub Date : 2024-04-23 Xuan Gao, Yiping Han, Jiajia Wang