{"title":"Applying the double-oscillator representation of the hydrogen atom to the evaluation of dipole matrix elements for Stark broadening calculations in strongly magnetized plasmas","authors":"J. Rosato","doi":"10.1016/j.jqsrt.2025.109527","DOIUrl":"https://doi.org/10.1016/j.jqsrt.2025.109527","url":null,"abstract":"The double-oscillator representation of the hydrogen atom, which involves the solving of the Schrödinger equation using semi-parabolic coordinates, is revisited in the framework of plasma spectroscopy applications. We apply the formalism to the numerical calculation of energy levels and wavefunctions in the presence of strong magnetic fields, at regimes such that the quadratic Zeeman effect is important. Motivated by current needs in astrophysics, we provide a semi-analytical formula for the dipole matrix elements that can be used in Stark line shape codes. These matrix elements enter therein as input, where they serve to quantify both the line intensities and the strength of the line broadening. We present samples of calculated spectra in the visible range for fields comprised between 10 and 100 kT and discuss the magnetic field dependence of the positions, intensities, and widths of a selection of lines.","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"101 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144304486","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}
{"title":"Using OMPS-LP color ratio to extract stratospheric aerosol particle radius and estimate its uncertainty","authors":"Yi Wang, Mark Schoeberl, Ghassan Taha","doi":"10.1016/j.jqsrt.2025.109560","DOIUrl":"https://doi.org/10.1016/j.jqsrt.2025.109560","url":null,"abstract":"The Ozone Mapping Profiler Suite Limb Profiler (OMPS-LP) uses limb scattering to measure the aerosol extinction coefficient at multiple wavelengths. We use the color ratio from the OMPS-LP extinction coefficient to derive the median radius of stratospheric aerosols and provide an estimate of its total uncertainty. The total uncertainty combines three primary sources: extinction measurement errors, uncertainty related to assumptions about aerosol size distribution width, and uncertainty due to the scattering phase function used by the OMPS-LP retrieval algorithm. Comparisons with <ce:italic>in situ</ce:italic> balloon measurements suggest that log-normal aerosol size distribution width values of 1.6 and 1.5 are appropriate for background conditions and the post-Raikoke (2019) eruption, respectively. Our results show favorable agreement with other satellite instruments on retrieved particle size. We show how aerosol particle radii evolve following the 2019 Raikoke and 2022 Hunga eruptions and quantify the uncertainty in particle sizes.","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"70 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144304484","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}
{"title":"Microwave scattering by rough polyhedral particles on a surface","authors":"Anne K. Virkki, Maxim A. Yurkin","doi":"10.1016/j.jqsrt.2025.109547","DOIUrl":"https://doi.org/10.1016/j.jqsrt.2025.109547","url":null,"abstract":"The electromagnetic (EM) scattering by non-symmetric wavelength-scale particles on a planar surface has numerous applications in the remote sensing of planetary bodies, both in planetary and geo-sciences. We conduct numerical simulations of EM scattering by rough polyhedral particles (with 12 or 20 faces) using the discrete-dipole approximation and contrast the results to that of spheres. The particles have permittivities corresponding to common minerals in the microwave regime (<mml:math altimg=\"si1.svg\" display=\"inline\"><mml:mrow><mml:msub><mml:mrow><mml:mi>ϵ</mml:mi></mml:mrow><mml:mrow><mml:mi>r</mml:mi></mml:mrow></mml:msub><mml:mo linebreak=\"goodbreak\" linebreakstyle=\"after\">=</mml:mo><mml:mn>4</mml:mn><mml:mo>.</mml:mo><mml:mn>7</mml:mn><mml:mo linebreak=\"goodbreak\" linebreakstyle=\"after\">+</mml:mo><mml:mn>0</mml:mn><mml:mo>.</mml:mo><mml:mn>016</mml:mn></mml:mrow></mml:math>i and <mml:math altimg=\"si2.svg\" display=\"inline\"><mml:mrow><mml:mn>7</mml:mn><mml:mo>.</mml:mo><mml:mn>8</mml:mn><mml:mo linebreak=\"goodbreak\" linebreakstyle=\"after\">+</mml:mo><mml:mn>0</mml:mn><mml:mo>.</mml:mo><mml:mn>09</mml:mn></mml:mrow></mml:math>i), and a size-frequency distribution (SFD) consistent with the observed scattering properties (power law distribution of size parameters between 0.5 and 8 with an index from <mml:math altimg=\"si3.svg\" display=\"inline\"><mml:mrow><mml:mo>−</mml:mo><mml:mn>2</mml:mn><mml:mo>.</mml:mo><mml:mn>5</mml:mn></mml:mrow></mml:math> to <mml:math altimg=\"si4.svg\" display=\"inline\"><mml:mrow><mml:mo>−</mml:mo><mml:mn>3</mml:mn><mml:mo>.</mml:mo><mml:mn>5</mml:mn></mml:mrow></mml:math>). The assumed substrate permittivity <mml:math altimg=\"si5.svg\" display=\"inline\"><mml:mrow><mml:mn>2</mml:mn><mml:mo>.</mml:mo><mml:mn>4</mml:mn><mml:mo linebreak=\"goodbreak\" linebreakstyle=\"after\">+</mml:mo><mml:mn>0</mml:mn><mml:mo>.</mml:mo><mml:mn>012</mml:mn></mml:mrow></mml:math>i corresponds to a powdered regolith. We present what roles the particle roundness, permittivity, and SFD for a realistic range of parameters play in the EM scattering properties as a function of incidence angle with a focus on backscattering in microwave-remote-sensing applications. The particle roundness and SFD have a clearly observable effect on the polarimetric properties, while the role of permittivity is relatively minor (in the studied range). Among various backscattering observables, the circular polarization ratio is the least sensitive to the decrease of the upper boundary (down to a size parameter of 3) and the index of the SFD.","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"6 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144304939","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}
Leo P. Mulholland, Steven J. Bromley, Connor P. Ballance, Stuart A. Sim, Catherine A. Ramsbottom
{"title":"On the use of the Axelrod formula for thermal electron collisions in astrophysical modelling","authors":"Leo P. Mulholland, Steven J. Bromley, Connor P. Ballance, Stuart A. Sim, Catherine A. Ramsbottom","doi":"10.1016/j.jqsrt.2025.109545","DOIUrl":"https://doi.org/10.1016/j.jqsrt.2025.109545","url":null,"abstract":"The Axelrod approximation is widely used in astrophysical modelling codes to evaluate electron-impact excitation effective collision strengths for forbidden transitions. Approximate methods such as this are a necessity for many heavy elements with open shells where collisional data is either non existent or sparse as the use of more robust methods prove prohibitively expensive. Atomic data for such forbidden transitions are essential for producing full collisional radiative models that do not assume Local-Thermodynamic-Equilibrium (LTE). In this short work we present the re-optimization the simple Axelrod formula for a large number of <mml:math altimg=\"si1.svg\" display=\"inline\"><mml:mi>R</mml:mi></mml:math>-matrix data sets, ranging from Fe and Ni to the first r-process peak elements of Sr, Y and Zr, to higher <mml:math altimg=\"si2.svg\" display=\"inline\"><mml:mi>Z</mml:mi></mml:math> systems Te, W, Pt and Au. We show that the approximate treatment of forbidden transitions can be a significant source of inaccuracy in such collisional radiative models. We find a large variance of the optimized coefficients for differing systems and charge states, although some general trends can be seen based on the orbital structure of the ground-state-configurations. These trends could potentially inform better estimates for future calculations for elements where <mml:math altimg=\"si1.svg\" display=\"inline\"><mml:mi>R</mml:mi></mml:math>-matrix data is not available.","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"21 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144304485","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}
{"title":"Modeling of ice albedo: A quantitative study of the impact of surface roughness","authors":"Tomonori Tanikawa, Kazuhiko Masuda, Hiroshi Ishimoto, Teruo Aoki, Knut Stamnes","doi":"10.1016/j.jqsrt.2025.109543","DOIUrl":"https://doi.org/10.1016/j.jqsrt.2025.109543","url":null,"abstract":"The effects of surface roughness on spectral and broadband (spectrally integrated) albedos of sea ice are investigated using a multiple scattering radiative transfer model for the atmosphere-snow/ice system (ARTMASS2). The model accounts for multiple scattering, incorporating Mie theory and geometric optics approximation for single scattering by various components such as snow grains, air bubbles, brine pockets, and cloud droplets across a wavelength range from 0.3 to <mml:math altimg=\"si1.svg\" display=\"inline\"><mml:mrow><mml:mn>4</mml:mn><mml:mo>.</mml:mo><mml:mn>0</mml:mn><mml:mspace width=\"0.2777em\"></mml:mspace><mml:mi mathvariant=\"normal\">μ</mml:mi><mml:mi mathvariant=\"normal\">m</mml:mi></mml:mrow></mml:math>. To account for the refractive index change at the air-ice interface, we introduced an ice surface reflection model. Recognizing the irregularity of sea ice surfaces, we integrated surface roughness into this model. Our findings indicate that sea ice surface roughness can significantly alter both spectral and broadband albedos. Particularly for bare sea ice, surface roughness plays a significant role in albedo variation.","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"11 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144304896","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}
Matthias Bonarens , Clemens Hansemann , Steven Wagner , Johannes Emmert
{"title":"A Bayesian framework for incorporating line data uncertainties into the evaluation of TDLAS traces using spectroscopic fits","authors":"Matthias Bonarens , Clemens Hansemann , Steven Wagner , Johannes Emmert","doi":"10.1016/j.jqsrt.2025.109526","DOIUrl":"10.1016/j.jqsrt.2025.109526","url":null,"abstract":"<div><div>Tunable diode laser absorption spectroscopy (TDLAS) is a well-established and robust technique for the analysis of gases. The properties of interest are typically inferred by fitting model spectra to experimentally obtained transmission traces. The required model parameters are taken from databases such as HITRAN and are inherently subject to uncertainty. However, the propagation of line data errors through spectroscopic fits is generally not considered in the literature. Not accounting for such model uncertainties can lead to considerable underestimation of the uncertainties in the derived gas properties. In this article, a Bayesian framework is presented that enables the incorporation of uncertainties of model spectra, computed using line data, into the evaluation of TDLAS traces. It is validated using simulated transmission spectra and found to provide reliable estimates for the quantities of interest and their uncertainties. Thus, it provides a practical tool that contributes to the advancement of spectroscopic analysis.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"345 ","pages":"Article 109526"},"PeriodicalIF":2.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144304487","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}
Alexandru Doicu , Dmitry S. Efremenko , Christopher L. Wirth , Thomas Wriedt
{"title":"An algorithm for solving the inverse problem in total internal reflection microscopy","authors":"Alexandru Doicu , Dmitry S. Efremenko , Christopher L. Wirth , Thomas Wriedt","doi":"10.1016/j.jqsrt.2025.109534","DOIUrl":"10.1016/j.jqsrt.2025.109534","url":null,"abstract":"<div><div>The inverse problem encountered in total internal reflection microscopy is particularly challenging due to the complex relationship between the data and the state vector. To address the computational difficulties and compute all possible solutions to this inverse problem, we propose an algorithm for solving problems of the form <span><math><mrow><mi>F</mi><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow><mo>=</mo><mi>y</mi></mrow></math></span>, where <span><math><mi>F</mi></math></span> is a nonlinear and continuous forward model, <span><math><mi>x</mi></math></span> is the state vector, and <span><math><mi>y</mi></math></span> is the data vector. The forward model is computationally expensive, lacks derivatives, and is treated as a black-box function, with no prior information available about the statistical properties of <span><math><mi>x</mi></math></span>, aside from a box constraint. Additionally, the data vector <span><math><mi>y</mi></math></span> is affected by uncertainties, making the retrieval of accurate solutions more challenging. To address these issues, the algorithm incorporates a neural network-based surrogate model to reduce computational costs and manage the absence of derivatives. A whitening transformation is applied to handle isotropic noise, and the residual is minimized within simple bounds. The method is further enhanced by a multistart solver that generates starting points through a hitting set problem, improving the exploration of the solution space and increasing the likelihood of finding all solutions. The solver iterates over the absolute function tolerance to identify both global and local minima, minimizes a least-squares function while adhering to simple bounds on variables during the local search phase, and includes a double box stopping rule. Additionally, the algorithm employs various sampling techniques and optimization methods, with the covariance matrix estimated using either a standard analytical approach or a Monte Carlo analysis.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"345 ","pages":"Article 109534"},"PeriodicalIF":2.3,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280191","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}
{"title":"Effective properties of resonant nanoparticle suspensions: Impact of the elementary volume shape and eigenmodes analysis","authors":"Timothée Guerra , Christophe Sauvan , Jean-Paul Hugonin , Cristina Gila-Vilchez , Iñigo González de Arrieta , Olivier Rozenbaum , Cédric Blanchard","doi":"10.1016/j.jqsrt.2025.109529","DOIUrl":"10.1016/j.jqsrt.2025.109529","url":null,"abstract":"<div><div>The study of the effective properties of random particulate materials is a storied subject, which gave rise to several effective-medium theories establishing a link between the microstructure and the macroscopic properties of inhomogeneous materials. This link is typically provided by the effective refractive index. However, effective-medium theories are defective when resonant interactions between the particles take place. Homogenization must then be performed via Maxwell’s equations from the rigorous calculation of the electromagnetic fields averaged over a statistical ensemble of realizations of the random medium in a finite domain, i.e., different configurations of the geometrical particle distribution. In even more restricted regimes originating from interparticle coupling, one observes markedly high field intensities at the surface of the particles or in localized regions of the agglomerate, casting doubts on the representativeness of the calculated mean field to extract an effective refractive index. Here we show that the value of the extracted effective refractive index may strongly depend on the shape of the ensemble’s configurations, irrespective of the statistical fluctuations of the states. This result is obtained by performing homogenization on systems of particles arranged in the shape of elliptic domains, with different eccentricities. The impact of the boundary effects on the effective refractive index is analyzed through the calculation of the quasinormal modes of the particulate systems, evidencing either strong fluctuations of the eigenfrequencies in the complex plane or Mie-type eigenmodes.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"345 ","pages":"Article 109529"},"PeriodicalIF":2.3,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280192","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}
M.V. Khan , D. Jacquemart , M. Guinet , M. Rey , A.V. Nikitin
{"title":"Line list for the ν3, ν3+ν6–ν6 and 2ν3–ν3 bands of methyl fluoride at 9.5 μm","authors":"M.V. Khan , D. Jacquemart , M. Guinet , M. Rey , A.V. Nikitin","doi":"10.1016/j.jqsrt.2025.109525","DOIUrl":"10.1016/j.jqsrt.2025.109525","url":null,"abstract":"<div><div>Six Fourier transform spectra recorded at room temperature and for pressures ranging from 0.1 to 4 mbar were analyzed in the spectral region of the <span><math><msub><mrow><mi>ν</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span> band of <span><math><mrow><msub><mrow><mi>CH</mi></mrow><mrow><mi>3</mi></mrow></msub><mi>F</mi></mrow></math></span> around <span><math><mrow><mn>9</mn><mo>.</mo><mn>5</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>. A multispectrum fitting procedure was used to measure the line positions and intensities for three bands (<span><math><msub><mrow><mi>ν</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>, <span><math><msub><mrow><mi>ν</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>+<span><math><msub><mrow><mi>ν</mi></mrow><mrow><mn>6</mn></mrow></msub></math></span>–<span><math><msub><mrow><mi>ν</mi></mrow><mrow><mn>6</mn></mrow></msub></math></span>, <span><math><mrow><mn>2</mn><msub><mrow><mi>ν</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span>–<span><math><msub><mrow><mi>ν</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>) of <span><math><mrow><msup><mrow></mrow><mrow><mi>12</mi></mrow></msup><msub><mrow><mi>CH</mi></mrow><mrow><mi>3</mi></mrow></msub><mi>F</mi></mrow></math></span> and one band (<span><math><msub><mrow><mi>ν</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>) of <span><math><mrow><msup><mrow></mrow><mrow><mi>13</mi></mrow></msup><msub><mrow><mi>CH</mi></mrow><mrow><mi>3</mi></mrow></msub><mi>F</mi></mrow></math></span> using the Voigt profile. The measured line intensities were then modeled using the vibrational transition dipole moment squared and a weak Herman–Wallis coefficient. A theoretical calculation of line positions based on <em>ab initio</em> and effective Hamiltonian models was performed and then compared to present measurements and calculations from the literature. The current work finally present a complete list (in HITRAN format) of the line parameters for four bands of <span><math><mrow><msub><mrow><mi>CH</mi></mrow><mrow><mi>3</mi></mrow></msub><mi>F</mi></mrow></math></span> (8907 transitions) in the <span><math><mrow><mn>9</mn><mo>.</mo><mn>5</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> spectral region.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"345 ","pages":"Article 109525"},"PeriodicalIF":2.3,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240696","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}
{"title":"De-excitation of K-shell hollow atoms with 12≤Z≤20: Transition rates and branching ratios","authors":"Karol Kozioł, Jacek Rzadkiewicz","doi":"10.1016/j.jqsrt.2025.109523","DOIUrl":"10.1016/j.jqsrt.2025.109523","url":null,"abstract":"<div><div>Investigating <span><math><mi>K</mi></math></span>-shell hollow atom spectra enhances our understanding of femtosecond phenomena in atomic physics, chemistry, and biology. Synchrotron measurements of two-electron one-photon (TEOP) transitions in low-<span><math><mi>Z</mi></math></span> atoms have revealed discrepancies between experimental results and theoretical predictions of TEOP relative intensities. These discrepancies appear to originate from an incomplete description of an atom’s response to the strong perturbation caused by <span><math><mi>K</mi></math></span>-shell double photoionization (DPI). The multiconfiguration Dirac–Hartree–Fock relativistic configuration interaction method has been applied for studying the TEOP spectra of Mg, Al, Si, S, Ar, and Ca atoms. The results show that branching ratios can be accurately reproduced by accounting for the effects of core and valence electron correlations, as well as the outer-shell ionization and excitation processes following <span><math><mi>K</mi></math></span>-shell DPI.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"345 ","pages":"Article 109523"},"PeriodicalIF":2.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144223180","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}