Journal of Quantitative Spectroscopy & Radiative Transfer最新文献

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New acetylene line list near 5μm - Part I: 12C2H2 近5μm的新乙炔线表-第一部分:12C2H2
IF 1.9 3区 物理与天体物理
Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-09-16 DOI: 10.1016/j.jqsrt.2025.109680
D. Jacquemart , F.K. Gueye , O.M. Lyulin , A.M. Solodov , T.M. Petrova , A.A. Solodov , V.I. Perevalov
{"title":"New acetylene line list near 5μm - Part I: 12C2H2","authors":"D. Jacquemart ,&nbsp;F.K. Gueye ,&nbsp;O.M. Lyulin ,&nbsp;A.M. Solodov ,&nbsp;T.M. Petrova ,&nbsp;A.A. Solodov ,&nbsp;V.I. Perevalov","doi":"10.1016/j.jqsrt.2025.109680","DOIUrl":"10.1016/j.jqsrt.2025.109680","url":null,"abstract":"<div><div>The spectroscopic knowledge of the 5-<em>µ</em>m spectral region of acetylene has been improved from the analysis of Fourier Transform spectra using high optical path length (up to 1 km). In the present work line positions and intensities were investigated for around 4300 transitions belonging to 60 bands of <sup>12</sup>C<sub>2</sub>H<sub>2</sub> including 15 bands already present in the HITRAN and GEISA databases. The band centers and the upper level spectroscopic constants were retrieved for all bands. Comparisons of measured line positions and calculated ones (with spectroscopic constants or effective Hamiltonian model) were performed for each band in order to select the best model to retain. The effective dipole moment operator parameters describing intensities observed in the Δ<em>P</em> = 3 spectral region were refined. The measured line positions and intensities have also been compared to the literature data included in the HITRAN and GEISA databases showing a good consistency for most of the bands, except for some bands for which only a few transitions were measured. A complete list of calculated line parameters for 6200 transitions has been generated for 60 bands between 1767 cm<sup>−1</sup> and 2267 cm<sup>−1</sup> and is available in the HITRAN format as supplementary material of this work.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"347 ","pages":"Article 109680"},"PeriodicalIF":1.9,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145209730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Corrections to radiative rates between atomic configurations 原子构型间辐射速率的修正
IF 1.9 3区 物理与天体物理
Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-09-16 DOI: 10.1016/j.jqsrt.2025.109649
Jean-Christophe Pain , Djamel Benredjem
{"title":"Corrections to radiative rates between atomic configurations","authors":"Jean-Christophe Pain ,&nbsp;Djamel Benredjem","doi":"10.1016/j.jqsrt.2025.109649","DOIUrl":"10.1016/j.jqsrt.2025.109649","url":null,"abstract":"<div><div>The computation of radiative opacity or emissivity of hot dense matter is a challenging task. It requires accounting for an immense number of energy levels and lines across various excitation and ionization states. Whether in local thermodynamic equilibrium (LTE) or non-LTE plasmas, statistical methods provide significant assistance. Many computational codes are based on the Detailed Configuration Accounting approximation, which involves averaged rates between configurations. In that approach, only the mean energies of the configurations are considered, and the effects of the energy distributions of the levels within the initial and final configurations are typically neglected. A long time ago, Klapisch proposed a method to correct the rates. The corresponding formalism includes the energy shift and variance of the Unresolved Transition Array, as well as the average energies of the configurations. We extend this formalism and investigate its impact on opacity calculations in two specific cases: first, the iron experiment conducted at Sandia National Laboratories under conditions similar to those at the base of the Sun’s convective zone, dominated by L-shell 2p-<span><math><mi>n</mi></math></span>d transitions, and second, laser experiments – still for iron – at much lower temperature. The latter measurements shed light on our understanding of the envelopes of <span><math><mi>β</mi></math></span>-Cephei-type stars, where the relevant transitions are intra-M-shell <span><math><mrow><mi>Δ</mi><mi>n</mi><mo>=</mo><mn>0</mn></mrow></math></span> (3-3) transitions, specifically 3s-3p and 3p-3d, in the XUV range. The issue of ensuring the validity of Kirchhoff’s law when plasmas approach LTE is also addressed, and a prescription is proposed, applying both to the standard configuration-to-configuration case and to the aforementioned corrections, which account for the energy distribution of the levels within a configuration.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"347 ","pages":"Article 109649"},"PeriodicalIF":1.9,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retrieval of temperature and extinction coefficient from modulated absorption emission technique: Effects of practical light collection, self-absorption, in-scattering, and finite spatial resolution 从调制吸收发射技术中获取温度和消光系数:实际光收集、自吸收、内散射和有限空间分辨率的影响
IF 1.9 3区 物理与天体物理
Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-09-13 DOI: 10.1016/j.jqsrt.2025.109662
Rajat Sawanni, Ömer L. Gülder
{"title":"Retrieval of temperature and extinction coefficient from modulated absorption emission technique: Effects of practical light collection, self-absorption, in-scattering, and finite spatial resolution","authors":"Rajat Sawanni,&nbsp;Ömer L. Gülder","doi":"10.1016/j.jqsrt.2025.109662","DOIUrl":"10.1016/j.jqsrt.2025.109662","url":null,"abstract":"<div><div>Light extinction and emission measurements in soot-laden flames have extensive application for axisymmetric fields where Abel inversion can de-convolve the radial field. The simplified treatment of the radiative transfer equation typically ignores the contributions from signal trapping, in-scattering, physical light collection systems, and finite spatial resolution. A backward Monte Carlo ray tracing methodology is implemented to gauge the validity of these assumptions for high pressure counterflow diffusion flames (CDFs) modelled as an axisymmetric, non-homogeneous, anisotropic, attenuating, and emitting media. Results show that the practical light collection angle is an important parameter with <span><math><mrow><mo>cot</mo><mi>θ</mi><mo>=</mo><mi>α</mi><mo>&lt;</mo><mn>107</mn></mrow></math></span> resulting in errors larger than 5% whereas the optical design in terms of telecentric and non-telecentric system has nominal effects. The in-scattering contributions are noted to be large for high pressure CDFs with measured extinction coefficients close to absorption coefficients at smaller wavelengths. Signal trapping is also larger for such flames and can cause <span><math><mrow><mo>∼</mo><mn>50</mn><mtext>%</mtext></mrow></math></span> reduction in recovered absolute radiance for <span><math><mrow><mi>λ</mi><mo>=</mo><mtext>650</mtext><mspace></mspace><mtext>nm</mtext></mrow></math></span>. A correction methodology for signal trapping is proposed and is noted to recover the unattenuated signal, albeit with slight over-predictions. The temperature estimates using uncorrected radiance can under-predict actual temperatures by <span><math><mrow><mo>∼</mo><mtext>150</mtext><mspace></mspace><mtext>K</mtext></mrow></math></span> for the highly sooting flame while the corrected radiance over-predicts it by <span><math><mrow><mo>∼</mo><mtext>25</mtext><mspace></mspace><mtext>K</mtext></mrow></math></span>. Finite spatial resolution is also noted to cause a 23% reduction in peak extinction coefficients at <span><math><mrow><mi>λ</mi><mo>=</mo><mtext>900</mtext><mspace></mspace><mtext>nm</mtext></mrow></math></span>, the error in which reduces with improved spatial resolution. Spectral disparity in spatial resolution also causes errors in temperature gradients and can over-predict the measured temperatures by <span><math><mrow><mo>∼</mo><mtext>50</mtext><mspace></mspace><mtext>K</mtext></mrow></math></span>.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"347 ","pages":"Article 109662"},"PeriodicalIF":1.9,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Collision induced absorption in HITRAN2024: Enhanced and improved data for atmospheric and planetary studies HITRAN2024中的碰撞诱导吸收:增强和改进大气和行星研究数据
IF 1.9 3区 物理与天体物理
Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-09-12 DOI: 10.1016/j.jqsrt.2025.109631
J. Terragni , I.E. Gordon , E.M. Adkins , C. Boulet , A. Campargue , D. Chistikov , A. Finenko , H. Finkenzeller , H. Fleurbaey , R.J. Hargreaves , R.K. Hanson , J.-M. Hartmann , A. Klingberg , E. Kohler , A.O. Koroleva , D. Mondelain , G. Piccioni , S. Stefani , C.L. Strand , H. Tran , C. Wei
{"title":"Collision induced absorption in HITRAN2024: Enhanced and improved data for atmospheric and planetary studies","authors":"J. Terragni ,&nbsp;I.E. Gordon ,&nbsp;E.M. Adkins ,&nbsp;C. Boulet ,&nbsp;A. Campargue ,&nbsp;D. Chistikov ,&nbsp;A. Finenko ,&nbsp;H. Finkenzeller ,&nbsp;H. Fleurbaey ,&nbsp;R.J. Hargreaves ,&nbsp;R.K. Hanson ,&nbsp;J.-M. Hartmann ,&nbsp;A. Klingberg ,&nbsp;E. Kohler ,&nbsp;A.O. Koroleva ,&nbsp;D. Mondelain ,&nbsp;G. Piccioni ,&nbsp;S. Stefani ,&nbsp;C.L. Strand ,&nbsp;H. Tran ,&nbsp;C. Wei","doi":"10.1016/j.jqsrt.2025.109631","DOIUrl":"10.1016/j.jqsrt.2025.109631","url":null,"abstract":"<div><div>Collision-Induced Absorption (CIA) phenomena play a key role in the atmospheric energy balance, making their accurate parametrization a decisive factor in modeling planetary atmospheres. This is the primary reason why the HITRAN spectroscopic database includes a dedicated section for CIAs. This section became available for the first time in 2012, followed by its first update in 2019. Six years since the first update, and with a significant amount of new data now available, it is timely to issue a second update. In this update, new data regarding collisional pairs that appear in the CIA section for the first time ( N<sub>2</sub>–Ar, and CO<sub>2</sub>– H<sub>2</sub>O) are presented. Concerning collisional pairs already present in the database, new data extending both spectral and temperature ranges are available for CO<sub>2</sub>– CO<sub>2</sub>, CO<sub>2</sub>– H<sub>2</sub>, CO<sub>2</sub>– CH<sub>4</sub>, H<sub>2</sub>– N<sub>2</sub>, O<sub>2</sub>– O<sub>2</sub>, and O<sub>2</sub>– CO<sub>2</sub>, while new experimental data about H<sub>2</sub>– H<sub>2</sub> and H<sub>2</sub>–He have been included alongside the respective theoretical calculations. Data sources, comparisons among different data, and selection criteria, are discussed in detail. The final section is focused on identifying the CIA data that would be most valuable for the planetary science and astrophysics community in the future.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"347 ","pages":"Article 109631"},"PeriodicalIF":1.9,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of null-collision backward Monte Carlo algorithm to digital image rendering of sooting flames in the visible range 零碰撞后向蒙特卡罗算法在可见范围内煤烟火焰数字图像绘制中的应用
IF 1.9 3区 物理与天体物理
Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-09-12 DOI: 10.1016/j.jqsrt.2025.109661
Mouna El Hafi , Vincent Eymet , Vincent Forest , Richard Fournier
{"title":"Application of null-collision backward Monte Carlo algorithm to digital image rendering of sooting flames in the visible range","authors":"Mouna El Hafi ,&nbsp;Vincent Eymet ,&nbsp;Vincent Forest ,&nbsp;Richard Fournier","doi":"10.1016/j.jqsrt.2025.109661","DOIUrl":"10.1016/j.jqsrt.2025.109661","url":null,"abstract":"<div><div>The objective of this work is to present a new tool to produce a digital image computation inside a sooting flame using Monte Carlo methods. The studied case consists of a laser emission corresponding to a spatially localized source of collimated radiation, that partially illuminates the environment. The laser emission consequently causes problems of convergence with a Monte Carlo method due to the difficulty in statistically linking sensors to sources. A new algorithm has been proposed to calculate the radiative intensity at a given probe position. An open source tool has been developed based on a combination of Null Collision Algorithms (NCA) with hierarchical grids technics from the computer graphics community, allowing to perform efficient radiative transfer (and possibly produce images). These tools are generic and are able to accept any input data such as, for instance, temperature and concentration fields produced by a Large Eddy Simulation (LES) approach over a tetrahedral grid. We show in this paper a first monochromatic digital image of a laminar sooting flame in the visible range. Such a new tool can for instance provide a useful support for experimental characterization of the radiative behavior of soot aggregates in flames, such as tracking effects of scattering.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"347 ","pages":"Article 109661"},"PeriodicalIF":1.9,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On persistent energy currents at equilibrium in non-reciprocal systems 非互易系统平衡态的持续能量流
IF 1.9 3区 物理与天体物理
Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-09-12 DOI: 10.1016/j.jqsrt.2025.109660
Svend-Age Biehs , Ivan Latella
{"title":"On persistent energy currents at equilibrium in non-reciprocal systems","authors":"Svend-Age Biehs ,&nbsp;Ivan Latella","doi":"10.1016/j.jqsrt.2025.109660","DOIUrl":"10.1016/j.jqsrt.2025.109660","url":null,"abstract":"<div><div>We investigate the properties of the mean Poynting vector in global thermal equilibrium, which can be non-zero in non-reciprocal electromagnetic systems. Using dyadic Green’s functions and the fluctuation–dissipation theorem, we provide a general proof that the mean Poynting vector is divergence-free under equilibrium conditions. Relying on this proof, we explicitly demonstrate that for systems where a normal mode expansion of the Green’s function is applicable, the divergence of the equilibrium mean Poynting vector vanishes. As concrete examples, we also examine the equilibrium mean Poynting vector near a planar non-reciprocal substrate and in configurations involving an arbitrary number of dipolar non-reciprocal objects in free space. Finally, we argue that the so-called persistent heat current, while present in equilibrium, cannot be detected through out-of-equilibrium heat transfer measurements.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"347 ","pages":"Article 109660"},"PeriodicalIF":1.9,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temperature- and pressure-dependent absorption cross sections of air-broadened isoprene between 810 and 1200 cm-1 for remote sensing of the terrestrial atmosphere 在810和1200 cm-1之间随温度和压力变化的空气加宽异戊二烯吸收截面,用于遥感地球大气
IF 1.9 3区 物理与天体物理
Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-09-10 DOI: 10.1016/j.jqsrt.2025.109671
Jeremy J. Harrison
{"title":"Temperature- and pressure-dependent absorption cross sections of air-broadened isoprene between 810 and 1200 cm-1 for remote sensing of the terrestrial atmosphere","authors":"Jeremy J. Harrison","doi":"10.1016/j.jqsrt.2025.109671","DOIUrl":"10.1016/j.jqsrt.2025.109671","url":null,"abstract":"<div><div>2-Methyl-1,3-butadiene, also known as isoprene, is the dominant biogenic volatile organic compound (BVOC) emitted by terrestrial vegetation. Over recent years it has been demonstrated that isoprene can be measured in the Earth’s atmosphere from remote sensing satellites, in particular by the series of Cross-track Infrared Sounder (CrIS) instruments. The interpretation of these measurements requires an accurate knowledge of the infrared absorption of isoprene in the atmosphere, which requires accurate laboratory spectroscopic data.</div><div>This work describes new high-resolution infrared absorption cross sections of isoprene / dry synthetic air over the spectral range 810 – 1200 cm<sup>-1</sup>, derived from spectra recorded using a high-resolution Fourier transform spectrometer (Bruker IFS 125HR) and a 26-cm-pathlength cell. Spectra of isoprene / dry synthetic air mixtures were recorded at resolutions between 0.015 and 0.03 cm<sup>-1</sup> (calculated as 0.9/MOPD; MOPD = maximum optical path difference) over a range of temperatures and pressures (50 – 761 Torr and 198 – 310 K). This new cross-section dataset is the first for air-broadened isoprene over a range of pressures and temperatures appropriate for atmospheric conditions, and expands upon the nitrogen-broadened one-atmosphere pressure dataset available from the Pacific Northwest National Laboratory. The new dataset is included in the latest 2024 compilation of the HITRAN database.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"347 ","pages":"Article 109671"},"PeriodicalIF":1.9,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Variant of the angular spectrum decomposition method for evaluating the beam shape coefficients: a comparison with the finite series technique 计算梁形系数的角谱分解法的一种变体:与有限级数法的比较
IF 1.9 3区 物理与天体物理
Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-09-10 DOI: 10.1016/j.jqsrt.2025.109669
Siqi Tang , Jianqi Shen , Gérard Gouesbet , Leonardo A. Ambrosio
{"title":"Variant of the angular spectrum decomposition method for evaluating the beam shape coefficients: a comparison with the finite series technique","authors":"Siqi Tang ,&nbsp;Jianqi Shen ,&nbsp;Gérard Gouesbet ,&nbsp;Leonardo A. Ambrosio","doi":"10.1016/j.jqsrt.2025.109669","DOIUrl":"10.1016/j.jqsrt.2025.109669","url":null,"abstract":"<div><div>This paper develops a variant of the angular spectrum decomposition (VASD) method for evaluating the beam shape coefficients (BSCs) of light beams containing both forward and backward propagating/attenuating components. Unlike the traditional ASD method, which is limited to unidirectional beams and is based on one boundary condition, the VASD method requires two boundary conditions. Using the VASD method, the BSCs of the on-axis located scalar Gaussian beam are formulated in one dimensional integrals and are further transformed to finite series expressions. It is found that the VASD-BSCs are exactly consistent with the BSCs derived in the finite series (FS) method. Based on the consistency of the VASD and the FS methods, the unexpected far-field divergence and the near-field oscillations observed in the remodeled Gaussian beam can be explained. Besides, the VASD method offers an alternative way to deduce the finite series expressions of the BSCs, thus enabling efficient computation.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"347 ","pages":"Article 109669"},"PeriodicalIF":1.9,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nonmonotonic near-field heat transfer between a pair of spheres 一对球体之间的非单调近场传热
IF 1.9 3区 物理与天体物理
Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-09-09 DOI: 10.1016/j.jqsrt.2025.109653
Asim Ur Rahman, Chen Ni, Muhammad Basir Abbas, M. Shahid Iqbal Khan, Yungui Ma
{"title":"Nonmonotonic near-field heat transfer between a pair of spheres","authors":"Asim Ur Rahman,&nbsp;Chen Ni,&nbsp;Muhammad Basir Abbas,&nbsp;M. Shahid Iqbal Khan,&nbsp;Yungui Ma","doi":"10.1016/j.jqsrt.2025.109653","DOIUrl":"10.1016/j.jqsrt.2025.109653","url":null,"abstract":"<div><div>We study near-field radiative heat exchange between a pair of equal and unequal radii of spheres, exploring the effects of material properties, sphere radii, and separation distances by following the exact mathematical solution. Previous studies suggested that larger area of the object transfer larger heat compared to smaller area of the object. However, our study reveals that this is not always true. We propose the first way to achieve unique results such that the conductance can be higher for a smaller area of the spheres. For equal-sized spheres, the thermal conductance increases with radius due to enhanced resonant coupling in tellurium and surface phonon polaritons in silicon dioxide. For unequal radii, we observe non-monotonic conductance trends in tellurium caused by hybridization of resonant modes. The role of Mie resonance in SiC, which is associated with size dependent effects and non-monotonic trends in both symmetric and asymmetric configurations, is highlighted. Quasi-Normal Mode analysis highlights the role of coupled resonances in modulating heat transfer.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"347 ","pages":"Article 109653"},"PeriodicalIF":1.9,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The B2Σ+−X2Σ+, 0−ν′′ progression of 12C17O+ reinvestigated by FT-UV emission spectroscopy 用FT-UV发射光谱重新研究了12C17O+的B2Σ+−X2Σ+, 0−ν”的过程
IF 1.9 3区 物理与天体物理
Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-09-09 DOI: 10.1016/j.jqsrt.2025.109633
Wojciech Szajna, Katarzyna Jachymek, Rafał Hakalla
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