Article (Scientific journals)
Newly identified energy levels and calculated transition rates in astatine atom, the rarest element on Earth
Quinet, Pascal; Sicorello, G.
2018In Journal of Quantitative Spectroscopy and Radiative Transfer, 204, p. 120-130
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Keywords :
Astatine; Rydberg states; Atomic parameter; Excited levels; Intermediate coupling; Physical model; Radiative parameters; Rydberg series; Theoretical investigations; Transition rates; Atoms
Abstract :
[en] A theoretical investigation of the atomic structure and radiative parameters involving the lowest states within the 6p5, 6p47s and 6p47p configurations of neutral astatine is reported for the first time in the present paper. Using different physical models based on the pseudo-relativistic Hartree–Fock approach, the influence of intravalence, core-valence and core-core electron correlation on the atomic parameters is discussed in detail. This work allowed us to establish the intermediate-coupling composition and to clearly fix the spectroscopic designation of six excited levels within the 6p47s and 6p47p configurations which had been located in previous experimental studies. In addition new tentative identifications of four levels belonging to the 6p49p and 6p410p configurations are reported in this work together with predicted level energies along the 6p4np and 6p4nd Rydberg series up to n = 50. © 2017 Elsevier Ltd
Disciplines :
Physics
Author, co-author :
Quinet, Pascal  ;  Université de Liège - ULiège > Département de physique > Spectroscopie atomique et Physique des atomes froids
Sicorello, G.;  Physique Atomique et Astrophysique, Université de Mons, Mons, Belgium
Language :
English
Title :
Newly identified energy levels and calculated transition rates in astatine atom, the rarest element on Earth
Publication date :
2018
Journal title :
Journal of Quantitative Spectroscopy and Radiative Transfer
ISSN :
0022-4073
Publisher :
Elsevier Ltd
Volume :
204
Pages :
120-130
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
P7/12, BELSPO, Federaal Wetenschapsbeleid
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