Article (Scientific journals)
Calculations of transition rates in erbium-like ions Lu IV, Hf V and Ta VI using the Ab initio MCDHF-RCI and semi-empirical HFR methods
Bokamba Motoumba, E.; Enzonga Yoca, S.; Quinet, Pascal et al.
2020In Atomic Data and Nuclear Data Tables, 133-134, p. 101340
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Abstract :
[en] In the present paper, the radiative properties of three ions belonging to the erbium isoelectronic sequence, i.e. Lu IV, Hf V and Ta IV, are reported and the effect of configuration interaction on these properties are taken into account for the first time to our knowledge. These heavy elements with Z=71–73 are located near to tungsten (Z=74) in the Periodic Table and are of potential interest in controlled thermonuclear fusion. Indeed, they could be used in plasma-facing materials such as the divertors in tokamaks or/and could be generated by neutron-induced transmutations of divertor's materials. In this work, two independent theoretical atomic structure computational approaches have been considered, i.e. the semi-empirical Hartree–Fock with relativistic corrections method (HFR) and the ab initio multiconfiguration Dirac–Hartree–Fock with subsequent relativistic configuration interaction method (MCDHF-RCI). The transition probabilities and the oscillator strengths have been calculated for 593, 820 and 1101 E1 transitions in Lu IV, Hf V and Ta VI respectively spanning the spectral range from UV to IR. Finally, this study also underlines the importance of core-valence correlations in these heavy atomic ions. © 2020 Elsevier Inc.
Disciplines :
Physics
Author, co-author :
Bokamba Motoumba, E.
Enzonga Yoca, S.
Quinet, Pascal  ;  Université de Liège - ULiège > Département de physique > Spectroscopie atomique et Physique des atomes froids
Palmeri, P.;  Physique Atomique et Astrophysique, Université de Mons – UMONS, Mons, B-7000, Belgium
Language :
English
Title :
Calculations of transition rates in erbium-like ions Lu IV, Hf V and Ta VI using the Ab initio MCDHF-RCI and semi-empirical HFR methods
Publication date :
2020
Journal title :
Atomic Data and Nuclear Data Tables
ISSN :
0092-640X
eISSN :
1090-2090
Publisher :
Academic Press Inc.
Volume :
133-134
Pages :
101340
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
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