Atomic Data and Nuclear Data Tables最新文献

Fine structure transitions with spectral features in Fe V and Fe VI

IF 2.7 3区物理与天体物理

Atomic Data and Nuclear Data Tables Pub Date : 2025-02-01 DOI: 10.1016/j.adt.2024.101700

Sultana N. Nahar

{"title":"Fine structure transitions with spectral features in Fe V and Fe VI","authors":"Sultana N. Nahar","doi":"10.1016/j.adt.2024.101700","DOIUrl":"10.1016/j.adt.2024.101700","url":null,"abstract":"<div><div>An extensive set of E1 transitions with spectral features for Fe V obtained using relativistic Breit–Pauli R-matrix (BPRM) method is presented. The results correspond to a larger amount of atomic data and of higher accuracy in comparison to the earlier R-matrix results. We report 1,712,655 transitions among 4300 fine structure levels with <span><math><mrow><mi>j</mi><mo>≤</mo><mn>10</mn></mrow></math></span>, <span><math><mrow><mn>2</mn><mi>S</mi><mo>+</mo><mn>1</mn><mo>=</mo></mrow></math></span> 5, 3, 1, <span><math><mrow><mi>L</mi><mo>≤</mo></mrow></math></span> 10, of even and odd parities of n <span><math><mrow><mo>≤</mo><mn>10</mn></mrow></math></span> and <span><math><mrow><mi>l</mi><mo>≤</mo><mn>9</mn></mrow></math></span>. The close coupling wavefunction expansion of Fe V includes ground and 18 excited levels of the core ion Fe VI. The theoretical spectroscopy of the fine structure levels for unique identifications was carried out using an algorithm based on quantum defect theory and angular algebra. The completeness of the calculated data sets is verified for all possible bound levels belonging to the relevant <span><math><mrow><mi>L</mi><mi>S</mi></mrow></math></span> terms. The energies are in very good agreement with measured values within a few percent for most levels. Comparison of transition parameters and lifetimes also indicate general agreement with others. The present data processed for spectral features that show the detectability of Fe V is well within range of James Webb Space Telescope and other observatories. The present results for Fe VI, obtained from relativistic atomic structure calculations in Breit–Pauli approximation using code SUPERSTRUCTURE, include allowed E1 and forbidden E2, M1, E3, M2 transitions, 506,512 in total among 1021 energy levels, bound and continuum. Calculations show much larger number of bound levels of configurations of <span><math><mrow><mn>3</mn><msup><mrow><mi>s</mi></mrow><mrow><mn>2</mn></mrow></msup><mn>3</mn><msup><mrow><mi>p</mi></mrow><mrow><mn>5</mn></mrow></msup><mn>3</mn><msup><mrow><mi>d</mi></mrow><mrow><mn>4</mn></mrow></msup></mrow></math></span> than those listed at NIST compilation table. The calculations included an optimized set of 9 configurations with orbitals going up to 4f. Comparison of energies, oscillator strengths, lifetimes with available values show good agreement although some large differences are also noted. In contrast to Fe V, the spectral features of Fe VI show three regions of strong lines in the soft-xray to ultraviolet wavelengths.</div></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"162 ","pages":"Article 101700"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095851","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

Matrix elements for spin-orbit couplings in KRb

IF 2.7 3区物理与天体物理

Atomic Data and Nuclear Data Tables Pub Date : 2025-02-01 DOI: 10.1016/j.adt.2024.101698

P. Jasik , D. Kȩdziera , J.E. Sienkiewicz

{"title":"Matrix elements for spin-orbit couplings in KRb","authors":"P. Jasik , D. Kȩdziera , J.E. Sienkiewicz","doi":"10.1016/j.adt.2024.101698","DOIUrl":"10.1016/j.adt.2024.101698","url":null,"abstract":"<div><div>In response to the need to investigate and create a reliable dataset of spin-orbit coupling matrix elements, we have extended our recent work in which we presented results for the potential energy curves and permanent and transition dipole moments in KRb. This paper presents 190 allowed spin-orbit couplings between 30 singlet and triplet <span><math><msup><mrow><mi>Σ</mi></mrow><mrow><mo>+</mo></mrow></msup></math></span>, <span><math><mi>Π</mi></math></span>, and <span><math><mi>Δ</mi></math></span> electronic states of the KRb molecule. These results are crucial for accurately interpreting spectroscopic data, especially for the deperturbation analysis challenges. 23 tables and 21 graphs present the <span><math><mrow><mi>L</mi><mi>S</mi><mi>X</mi></mrow></math></span>, <span><math><mrow><mi>L</mi><mi>S</mi><mi>Y</mi></mrow></math></span> , and <span><math><mrow><mi>L</mi><mi>S</mi><mi>Z</mi></mrow></math></span> components of reported spin-orbit couplings. Using the MOLPRO code, we performed MRCI calculations using the large-core pseudopotentials and core polarization potentials with reoptimized cutoff parameters. The spin-orbit parameters of the potassium pseudopotential were deduced and optimized from scratch. The Gaussian basis sets used in our calculations were appropriately selected, augmented, and optimized. We compare some of our data with available theoretical and experimental results.</div></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"162 ","pages":"Article 101698"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095847","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}

引用次数: 0

Subshell gaps and onsets of collectivity from proton and neutron pairing gap correlations

IF 2.7 3区物理与天体物理

Atomic Data and Nuclear Data Tables Pub Date : 2025-02-01 DOI: 10.1016/j.adt.2024.101699

José Nicolás Orce

{"title":"Subshell gaps and onsets of collectivity from proton and neutron pairing gap correlations","authors":"José Nicolás Orce","doi":"10.1016/j.adt.2024.101699","DOIUrl":"10.1016/j.adt.2024.101699","url":null,"abstract":"<div><div>Throughout the nuclear chart, particle-hole correlations give rise to giant resonances and, together with the proton–neutron interaction, deformation and rotational bands. In order to shed light on many-body correlations in open-shell nuclei, I explore macroscopic properties that could manifest from the collective behaviour of protons and neutrons. Intuitively, the correlation of proton and neutron Cooper pairs can be inferred from the respective pairing gaps, that can precisely be extracted from the AME 2020 atomic mass evaluation through odd-even atomic mass differences. This work shows that the combination of large and close-lying proton and neutron pairing gaps is sensitive to onsets of collectivity and subshell gaps in superfluid nuclei, away from major shell closures. Trends of reduced transition probabilities or B(E2) values — which describe the collective overlap between the wave functions of initial and final nuclear states — are revealed in overall agreement with data. Specially interesting is the peak of collectivity in the tin isotopes at <sup>110</sup>Sn, instead of at midshell, as expected by large-scale shell-model calculations; a situation that has astounded the nuclear physics community for quite some time.</div></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"162 ","pages":"Article 101699"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095846","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

Photonuclear partial reaction cross sections: Systematic uncertainties and reliability 光核部分反应截面：系统的不确定性和可靠性

IF 2.7 3区物理与天体物理

Atomic Data and Nuclear Data Tables Pub Date : 2024-10-08 DOI: 10.1016/j.adt.2024.101697

V.V. Varlamov, A.I. Davydov, V.N. Orlin

{"title":"Photonuclear partial reaction cross sections: Systematic uncertainties and reliability","authors":"V.V. Varlamov, A.I. Davydov, V.N. Orlin","doi":"10.1016/j.adt.2024.101697","DOIUrl":"10.1016/j.adt.2024.101697","url":null,"abstract":"<div><div>The well-known significant systematic disagreements between cross sections of partial photoneutron reactions <span><math><mrow><mo>(</mo><mrow><mi>γ</mi><mo>,</mo><mn>1</mn><mi>n</mi></mrow><mo>)</mo></mrow></math></span> and (<em>γ</em>, 2<em>n</em>) obtained in various experiments majority of which have been carried out at Livermore (USA) and Saclay (France) were analyzed using the objective physical criteria of data reliability. It was found that experimental data for more than 50 nuclei from <sup>51</sup>V to <sup>209</sup>Bi in general do not meet those criteria and therefore are more or less unreliable. The experimental-theoretical method based on the Combined PhotoNuclear Reaction Model (CPNRM) was used to evaluate partial reaction cross sections that meet the reliability criteria. It was shown using the analysis in detail of differences between evaluated and experimental cross sections that the major sources of large systematic uncertainties in obtained cross sections are certain shortcomings of experimental neutron multiplicity sorting method have been used for indirect separation of partial reactions. It was shown that the newly evaluated cross sections of partial photoneutron reactions differ significantly (at least noticeably) from the ones obtained using the method of neutron multiplicity sorting but agree with experimental data obtained by alternative methods used for reliable direct separation of partial reactions. The consolidated review of many problems with partial photoneutron reaction experimental data reliability and some ways to solve ones are presented.</div></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"161 ","pages":"Article 101697"},"PeriodicalIF":2.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757143","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

Theoretical level energies and transition data for 4p64d7, 4p54d8 and 4p64d64f configurations of W31+ ion W31+离子4p64d7、4p54d8和4p64d64f构型的理论能级和跃迁数据

IF 2.7 3区物理与天体物理

Atomic Data and Nuclear Data Tables Pub Date : 2024-10-04 DOI: 10.1016/j.adt.2024.101693

R. Karpuškienė, R. Kisielius

{"title":"Theoretical level energies and transition data for 4p64d7, 4p54d8 and 4p64d64f configurations of W31+ ion","authors":"R. Karpuškienė, R. Kisielius","doi":"10.1016/j.adt.2024.101693","DOIUrl":"10.1016/j.adt.2024.101693","url":null,"abstract":"<div><div>The <em>ab initio</em> quasirelativistic approach developed specifically for the calculation of spectral parameters of highly charged ions has been used to determine transition data for the Tc-like tungsten ion W<span><math><msup><mrow></mrow><mrow><mn>31</mn><mo>+</mo></mrow></msup></math></span>. This is the final paper of our studies examining spectroscopic properties of the tungsten ions with open 4d shell in the ground state. The configuration interaction method has been utilized to include electron correlation effects. The relativistic effects have been taken into account in the Breit–Pauli approximation. Level energies, their radiative lifetimes <span><math><mi>τ</mi></math></span>, and Landé <span><math><mi>g</mi></math></span>-factors have been determined for the ground configuration 4p<span><math><msup><mrow></mrow><mrow><mn>6</mn></mrow></msup></math></span>4d<span><math><msup><mrow></mrow><mrow><mn>7</mn></mrow></msup></math></span> and two excited configurations, 4p<span><math><msup><mrow></mrow><mrow><mn>5</mn></mrow></msup></math></span>4d<sup>8</sup> and 4p<sup>6</sup>4d<sup>6</sup>4f. The radiative transition wavelengths <span><math><mi>λ</mi></math></span> and emission transition probabilities <span><math><mi>A</mi></math></span> for the electric dipole, electric quadrupole, electric octupole, magnetic dipole, and magnetic quadrupole transitions among the fine-structure levels of these configurations have been computed and analyzed. The uncertainties of produced spectroscopic parameters have been evaluated.</div></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"161 ","pages":"Article 101693"},"PeriodicalIF":2.7,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757137","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

ADNDT's enduring distinct role in the scientific publishing ecosystem ADNDT在科学出版生态系统中持久的独特作用

IF 2.7 3区物理与天体物理

Atomic Data and Nuclear Data Tables Pub Date : 2024-10-03 DOI: 10.1016/j.adt.2024.101695

David R. Schultz , Boris Pritychenko

引用次数: 0

Comprehensive review of 2β decay half-lives 2β衰变半衰期的综合评述

IF 2.7 3区物理与天体物理

Atomic Data and Nuclear Data Tables Pub Date : 2024-10-02 DOI: 10.1016/j.adt.2024.101694

B. Pritychenko , V.I. Tretyak

引用次数: 0

Mean Excitation Energies of all ionization stages of all atoms with 1≤Z≤86 1≤Z≤86的所有原子各电离阶段的平均激发能

IF 2.7 3区物理与天体物理

Atomic Data and Nuclear Data Tables Pub Date : 2024-10-02 DOI: 10.1016/j.adt.2024.101696

J. Walkowiak , J. Bielecki , J. Bieroń , A. Jardin , Y. Savoye-Peysson , D. Mazon , K. Król , D. Dworak , M. Scholz

{"title":"Mean Excitation Energies of all ionization stages of all atoms with 1≤Z≤86","authors":"J. Walkowiak , J. Bielecki , J. Bieroń , A. Jardin , Y. Savoye-Peysson , D. Mazon , K. Król , D. Dworak , M. Scholz","doi":"10.1016/j.adt.2024.101696","DOIUrl":"10.1016/j.adt.2024.101696","url":null,"abstract":"<div><div>The presented work provides values of Mean Excitation Energy (MEE) for all atoms and their ions with atomic numbers <span><math><mrow><mn>1</mn><mo>≤</mo><mi>Z</mi><mo>≤</mo><mn>86</mn></mrow></math></span>. To fill in the gaps in the available data, we propose an approximate atomic model for ions of high-Z elements, that uses a semi-empirical formula based on the Local Plasma Approximation (LPA). Despite the fact that the LPA, in its original form, poorly predicts MEE for high ionization states, a relatively simple modification utilizing a fit function can amend this shortcoming. We assess the importance of relativistic effects for the MEE for highly ionized atoms and compare the proposed formula to other approximations available for high-Z elements. We estimate the uncertainty of the presented data to be less than 40% in absolute value for the worst cases and less than 20% for most ions. This corresponds to an uncertainty of the order of few percent for the logarithm of MEE, which is the value of interest in the case of Bethe’s theory of stopping power.</div></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"161 ","pages":"Article 101696"},"PeriodicalIF":2.7,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757140","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}

引用次数: 0

Collective model description of parity-doublet bands in odd mass nuclei 奇质量原子核中奇偶重态带的集体模型描述

IF 2.7 3区物理与天体物理

Atomic Data and Nuclear Data Tables Pub Date : 2024-09-26 DOI: 10.1016/j.adt.2024.101692

R. Budaca

引用次数: 0

Single-electron capture from helium targets by heavy nuclei of charges 1–7 电荷数为 1-7 的重核从氦靶俘获单电子

IF 2.7 3区物理与天体物理

Atomic Data and Nuclear Data Tables Pub Date : 2024-08-31 DOI: 10.1016/j.adt.2024.101685

I. Mančev , N. Milojević , D. Delibašić , M. Milenković , Dž. Belkić

引用次数: 0