Atomic Data and Nuclear Data Tables最新文献

{"title":"Nuclear ground-state properties probed by the relativistic Hartree–Bogoliubov approach","authors":"Zi Xin Liu , Yi Hua Lam , Ning Lu , Peter Ring","doi":"10.1016/j.adt.2023.101635","DOIUrl":"10.1016/j.adt.2023.101635","url":null,"abstract":"<div><p>Using the relativistic Hartree–Bogoliubov approach with separable pairing force coupled with the latest point-coupling and meson-exchange covariant density functionals, i.e., PC-L3R, PC-X, DD-MEX, and DD-PCX, we systematically explore the ground-state properties of all isotopic chains from oxygen (<span><math><mrow><mi>Z</mi><mspace></mspace><mo>=</mo><mspace></mspace><mn>8</mn></mrow></math></span>) to darmstadtium (<span><math><mrow><mi>Z</mi><mspace></mspace><mo>=</mo><mspace></mspace><mn>110</mn></mrow></math></span>). These properties consist of the binding energies (<span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>b</mi></mrow></msub></math></span>), one- and two-neutron separation energies (<span><math><msub><mrow><mi>S</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>S</mi></mrow><mrow><mi>2n</mi></mrow></msub></math></span>), root-mean-square radii of matter (<span><math><msub><mrow><mi>R</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span>), of neutron (<span><math><msub><mrow><mi>R</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span>), of proton (<span><math><msub><mrow><mi>R</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span>) and of charge (<span><math><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>) distributions, Fermi surfaces (<span><math><mi>λ</mi></math></span>), ground-state spins (<span><math><mi>J</mi></math></span>) and parities (<span><math><mi>π</mi></math></span>). We then use these calculated properties to predict the edges of nuclear landscape and bound nuclei for the isotopic chains of <span><math><mi>Z</mi></math></span> = 8–110. The number of bound nuclei predicted by PC-L3R, PC-X, DD-MEX, and DD-PCX, are 9004, 9162, 7112, and 6799, respectively. These latest covariant density functionals produce a set of rather similar proton drip lines due to the strong repulsive Coulomb force shifting up the single-proton energy of the proton-rich nuclei. PC-L3R and PC-X estimate more extended borders of the neutron-rich region compared with the neutron drip lines estimated by DD-MEX, and DD-PCX. Meanwhile, the root-mean-square deviations of one- (two-) neutron separation energies yielded from PC-L3R, PCX, DD-MEX, and DD-PCX are 0.962 (1.300) MeV, 0.920 (1.483) MeV, 1.010 (1.544) MeV, and 0.993 (1.753) MeV, respectively. The deviations of theoretical <span><math><msub><mrow><mi>S</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span>, <span><math><msub><mrow><mi>S</mi></mrow><mrow><mi>2n</mi></mrow></msub></math></span>, and charge radii from the available experimental ones increase at the regions further away from the proton magic numbers, indicating the important role of deformation in these regions. The root-mean-square deviations of charge radius distributions of comparing the available experimental values with the theoretical counterparts resulted from PC-L3R, PC-X, DD-MEX, and DD-PCX are 0.035 fm, 0.037 fm, 0.034 fm, and 0.035 fm, respecti","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"156 ","pages":"Article 101635"},"PeriodicalIF":1.8,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139664144","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":"Recommended electron-impact excitation and ionization cross sections for Be II","authors":"Dipti ,&nbsp;I. Bray ,&nbsp;D.V. Fursa ,&nbsp;H. Umer ,&nbsp;C. Hill ,&nbsp;Yu. Ralchenko","doi":"10.1016/j.adt.2023.101634","DOIUrl":"10.1016/j.adt.2023.101634","url":null,"abstract":"<div><p>An overview of the current status of electron-impact excitation and ionization cross sections for Be II is given and the recommended data sets for use in plasma modeling are presented. Accurate cross sections between the lowest 14 atomic terms of <span><math><mrow><mn>1</mn><msup><mrow><mi>s</mi></mrow><mrow><mn>2</mn></mrow></msup><mi>n</mi><mi>l</mi><mrow><mo>(</mo><mi>n</mi><mo>≤</mo><mn>5</mn><mo>)</mo></mrow></mrow></math></span> configurations are calculated with the convergent close-coupling (CCC) method and compared with the available experimental and theoretical results. The recommended electron-impact excitation and ionization cross sections are represented by analytical fitting functions that preserve correct asymptotic behavior. Uncertainties in the recommended data sets are determined by assessing the accuracy of the target structures, the convergence in the subsequent collisional calculations, and the fitting method. They are well within 15 % for most of the transitions. The fitting coefficients for 91 excitation cross sections and 14 ionization cross sections are provided for use in plasma modeling simulations.</p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"156 ","pages":"Article 101634"},"PeriodicalIF":1.8,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139415094","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":"Photoionization cross-sections of valence ns and np (n = 2,3) atomic shells in soft x-ray region","authors":"L.V. Chernysheva ,&nbsp;V.G. Yarzhemsky","doi":"10.1016/j.adt.2023.101621","DOIUrl":"10.1016/j.adt.2023.101621","url":null,"abstract":"<div><p><span>Theoretical photoionization cross-sections for average of configuration terms of valence </span><em>ns-</em> and <em>np-</em> shells of atoms C, N, O, F, Ne, Si, P, S, Cl and Ar are calculated with account for intrachannel and interchannel interactions for the energy region from threshold to 400 eV. The many-electron effects were accounted for within the framework of RPAE (random phase approximation with exchange) method, which is extended for average terms of unfilled shells. Calculations demonstrate for open-shell atoms similar effects as that were known for noble gas atoms Ne and Ar, namely a strong decrease of photoionization cross-sections of <em>ns-</em> subshell due to the interaction of transitions <span><math><mrow><mi>n</mi><mi>s</mi><mo>→</mo><mrow><mi>ε</mi></mrow><mi>p</mi></mrow></math></span> and <span><math><mrow><mi>n</mi><mi>p</mi><mo>→</mo><mrow><mi>ε</mi></mrow><mi>d</mi></mrow></math></span>.</p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"155 ","pages":"Article 101621"},"PeriodicalIF":1.8,"publicationDate":"2023-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135714878","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":"Differential cross sections for the N(4S)-H(2S), N(4S)-H+ and N+(3P)-H(2S) elastic collisions","authors":"M. Buchowiecki","doi":"10.1016/j.adt.2023.101620","DOIUrl":"10.1016/j.adt.2023.101620","url":null,"abstract":"<div><p>The differential cross sections for the N(⁴S)-H(²S), N(⁴S)-H<span><math><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup></math></span> and N<span><math><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup></math></span>(³P)-H(²S) elastic collisions were calculated and reported in the energy range of <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>4</mn></mrow></msup></mrow></math></span>–3.7 hartree for the studies of transport properties of ionized gases with the Boltzmann equation.</p><p>They were verified by comparison with the integrated and momentum-transfer cross sections. The importance of appropriate grid of angles and possibility of neglecting the smallest phase shifts are discussed.</p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"155 ","pages":"Article 101620"},"PeriodicalIF":1.8,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0092640X23000487/pdfft?md5=aec2d4e0dcb356aac5b674f09adfae94&pid=1-s2.0-S0092640X23000487-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135762258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bulk and neutron–proton asymmetry coefficients of the semi-empirical mass formula tuned to ground state mass excess of AME2020 and/or FRDM(2012)","authors":"Dalip Singh Verma ,&nbsp;Vivek ,&nbsp;Kushmakshi","doi":"10.1016/j.adt.2023.101619","DOIUrl":"10.1016/j.adt.2023.101619","url":null,"abstract":"<div><p>Davidson et al. has extended Seeger’s mass formula to non-zero excitation energies by introducing temperature-dependent coefficients in the liquid drop energy part of the semi-empirical mass formula, but did not consider the nuclear shape and shell effects. The semi-empirical mass formula of Davidson et al. is applicable for nuclear temperatures less than or equal to 4 MeV. The mass excess calculated using this mass formula with/without nuclear shape and shell effects does not reproduce the ground state mass excesses of the new atomic mass evaluation data AME2020 and/or FRDM(2012) with its coefficients at zero temperature. So, the coefficients of the semi-empirical mass formula with nuclear shape and shell effects are required to be tuned to reproduce the ground state mass excess of all the nuclei available in the recent atomic mass evaluation data AME2020 and/or FRDM(2012). The bulk and neutron–proton asymmetry coefficients of the semi-empirical mass formula of Davidson et al., including the nuclear shape and shell effects, have been tuned to reproduce the mass excess data for all known 9420 nuclei which include all the nuclei of AME2020 (Z <span><math><mo>=</mo></math></span> 1-118 and A <span><math><mo>=</mo></math></span> 1-295) and of FRDM(2012) (Z <span><math><mo>=</mo></math></span> 8-136 and A <span><math><mo>=</mo></math></span><span> 16-339, except 3456 nuclei which are also available in the AME2020 data) at zero temperature. The tuned bulk and neutron–proton asymmetry coefficients reproduce the ground state mass excess of the new atomic mass evaluation data AME2020 and/or FRDM(2012) within a difference of less than 1 MeV and can be used for the applications/investigations in the areas of physics where high energies are experienced or nuclei involved are in excited states, e.g., fusion–evaporation and fusion–fission processes in heavy-ion reactions. The mass excess calculated for the excited states of nuclei is compared with the excited state mass excess of the NUBASE2020 evaluation data and is in good agreement with it.</span></p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"155 ","pages":"Article 101619"},"PeriodicalIF":1.8,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134994408","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":"Relativistic atomic structure calculations for B-like xenon ion","authors":"Shikha Rathi,&nbsp;Lalita Sharma","doi":"10.1016/j.adt.2023.101611","DOIUrl":"10.1016/j.adt.2023.101611","url":null,"abstract":"<div><p>Excitation energies, transition parameters and lifetimes for 255 levels with <span><math><mi>n</mi></math></span> <span><math><mo>≤</mo></math></span> 4 configurations of B-like Xe<span><math><msup><mrow></mrow><mrow><mn>49</mn><mo>+</mo></mrow></msup></math></span><span> are calculated using the fully relativistic multiconfiguration Dirac–Hartree–Fock (MCDHF) method. Hyperfine structure<span> constants, isotope shift and Landé </span></span><span><math><msub><mrow><mi>g</mi></mrow><mrow><mi>J</mi></mrow></msub></math></span> factors are computed for the <span><math><mrow><mn>2</mn><msup><mrow><mi>s</mi></mrow><mrow><mn>2</mn></mrow></msup><mn>2</mn><mi>p</mi><mo>,</mo><mn>2</mn><mi>s</mi><mn>2</mn><msup><mrow><mi>p</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span> and <span><math><mrow><mn>2</mn><msup><mrow><mi>p</mi></mrow><mrow><mn>3</mn></mrow></msup></mrow></math></span> levels. The contribution of the Breit interaction and QED effects, mainly self-energy and vacuum polarization corrections, on these levels is also investigated. The uncertainties in the lifetimes and line strengths are computed, and transitions are classified according to the NIST accuracy nomenclature. A comparison with the previously available results is also carried out. This study provides extensive results for B-like Xe<span><math><msup><mrow></mrow><mrow><mn>49</mn><mo>+</mo></mrow></msup></math></span><span>, which are useful for plasma diagnosis.</span></p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"155 ","pages":"Article 101611"},"PeriodicalIF":1.8,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135434286","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":"Thailand Raw Water Quality Dataset Analysis and Evaluation","authors":"Jaturapith Krohkaew, Pongpon Nilaphruek, Niti Witthayawiroj, Sakchai Uapipatanakul, Yamin Thwe, Padma Nyoman Crisnapati","doi":"10.3390/data8090141","DOIUrl":"https://doi.org/10.3390/data8090141","url":null,"abstract":"Sustainable water quality data are important for understanding historical variability and trends in river regimes, as well as the impact of industrial waste on the health of aquatic ecosystems. Sustainable water management practices heavily depend on reliable and comprehensive data, prompting the need for accurate monitoring and assessment of water quality parameters. This research describes a reconstructed daily water quality dataset that complements rare historical observations for six station points along the Chao Phraya River in Thailand. Internet of Things technology and a Eureka water probe sensor is used to collect and reconstruct the water quality dataset for the period from June 2022–February 2023, with Turbidity, Optical Dissolved Oxygen, Dissolved Oxygen Saturation, Spatial Conductivity, Acidity/Basicity, Total Dissolved Solids, Salinity, Temperature, Chlorophyll, and Depth as the recorded parameters from six different stations. The presented dataset comprises a total of 211,322 data points, which are separated into six CSV files. The dataset is then evaluated using the Long Short-Term Memory (LSTM) algorithm with a Mean Squared Error (MSE) of 0.0012256, and Root Mean Squared Error (RMSE) of 0.0350080. The proposed dataset provides valuable insights for researchers studying river ecosystems, supporting informed decision-making and sustainable water management practices.","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"4 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73307194","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":"Compilation of isomeric ratios of light particle induced nuclear reactions","authors":"A. Rodrigo ,&nbsp;N. Otuka ,&nbsp;S. Takács ,&nbsp;A.J. Koning","doi":"10.1016/j.adt.2023.101583","DOIUrl":"10.1016/j.adt.2023.101583","url":null,"abstract":"<div><p>Experimental isomeric ratios of light (A <span><math><mo>≤</mo></math></span> 4) particle-induced nuclear reactions were compiled for the product nuclides having metastable states with half-lives longer than 0.1 s. The experimental isomeric ratio data were taken from the EXFOR library and reviewed. When an experiment reports isomer production cross sections instead of isomeric ratios, the cross sections taken from the EXFOR library were converted to the isomeric ratios by us. During compilation, questionable data (<em>e.g.,</em> preliminary data compiled in EXFOR in parallel with their final data, sum of isomer production cross sections larger than the total production cross sections) were excluded. As an application of the new compilation, goodness-of-fit was studied for the isomeric ratios predicted by the reaction model code TALYS-1.96. A text file and plots of the compiled isomer production cross sections and isomeric ratios are provided as supplemental materials.</p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"153 ","pages":"Article 101583"},"PeriodicalIF":1.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48825688","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":"Employing Source Code Quality Analytics for Enriching Code Snippets Data","authors":"Thomas Karanikiotis, Themistoklis G. Diamantopoulos, A. Symeonidis","doi":"10.3390/data8090140","DOIUrl":"https://doi.org/10.3390/data8090140","url":null,"abstract":"The availability of code snippets in online repositories like GitHub has led to an uptick in code reuse, this way further supporting an open-source component-based development paradigm. The likelihood of code reuse rises when the code components or snippets are of high quality, especially in terms of readability, making their integration and upkeep simpler. Toward this direction, we have developed a dataset of code snippets that takes into account both the functional and the quality characteristics of the snippets. The dataset is based on the CodeSearchNet corpus and comprises additional information, including static analysis metrics, code violations, readability assessments, and source code similarity metrics. Thus, using this dataset, both software researchers and practitioners can conveniently find and employ code snippets that satisfy diverse functional needs while also demonstrating excellent readability and maintainability.","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"474 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84073986","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":"A Framework for Evaluating Renewable Energy for Decision-Making Integrating a Hybrid FAHP-TOPSIS Approach: A Case Study in Valle del Cauca, Colombia","authors":"Mateo Barrera-Zapata, Fabian Zuñiga-Cortes, Eduardo Caicedo-Bravo","doi":"10.3390/data8090137","DOIUrl":"https://doi.org/10.3390/data8090137","url":null,"abstract":"At present, the energy landscape of many countries faces transformational challenges driven by sustainable development objectives, supported by the implementation of clean technologies, such as renewable energy sources, to meet the flexibility and diversification needs of the traditional energy mix. However, integrating these technologies requires a thorough study of the context in which they are developed. Furthermore, it is necessary to carry out an analysis from a sustainable approach that quantifies the impact of proposals on multiple objectives established by stakeholders. This article presents a framework for analysis that integrates a method for evaluating the technical feasibility of resources for photovoltaic solar, wind, small hydroelectric power, and biomass generation. These resources are used to construct a set of alternatives and are evaluated using a hybrid FAHP-TOPSIS approach. FAHP-TOPSIS is used as a comparison technique among a collection of technical, economic, and environmental criteria, ranking the alternatives considering their level of trade-off between criteria. The results of a case study in Valle del Cauca (Colombia) offer a wide range of alternatives and indicate a combination of 50% biomass, and 50% solar as the best, assisting in decision-making for the correct use of available resources and maximizing the benefits for stakeholders.","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"9 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77221921","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}