Accurate CI-MBPT calculation of radiative lifetimes and transition probabilities of neutral lanthanum (La I) odd states with J = 3/2

Filin, Dmytro; Savukov, Igor M.

doi:10.1088/1402-4896/abb421

Accurate CI-MBPT calculation of radiative lifetimes and transition probabilities of neutral lanthanum (La I) odd states with J = 3/2

Journal Article · Wed Sep 09 00:00:00 EDT 2020 · Physica Scripta (Online)

DOI:https://doi.org/10.1088/1402-4896/abb421· OSTI ID:1726205

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

In this work, an accurate calculation of radiative lifetimes and transition probabilities of the first 21 odd states with a total angular momentum J = 3/2 was performed for La I using configuration-interaction many-body perturbation theory (CI-MBPT). A technique to obtain correct transition amplitudes was devised for pairs of states with substantial mixing that improved the theoretical accuracy. The results were compared to known experimental and theoretical data for the considered transitions. It has been shown that the transition data calculated with CI-MBPT and with corrections for pairs of mixed states are in good agreement with the latest experimental data of Den Hartog et al, 2015 J. Phys. B: At. Mol. Phys. 48, 155 001, better than other theoretical results. The transition data can find many applications in astrophysics, and the CI-MBPT formalism with mixing correction is applicable to other atoms similar to or more complex than La I.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1726205

Alternate ID(s):: OSTI ID: 23048262

Report Number(s):: LA-UR--20-23523

Journal Information:: Physica Scripta (Online), Journal Name: Physica Scripta (Online) Journal Issue: 10 Vol. 95; ISSN 1402-4896

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Accurate CI-MBPT calculation of radiative lifetimes and transition probabilities of neutral lanthanum (La I) odd states with J = 3/2

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