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Visible spectra of heavy ions with an open 4f shell
Author(s) -
Murata Shunichi,
Safronova Marianna S.,
Safronova Ulyana I.,
Nakamura Nobuyuki
Publication year - 2019
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.3097
Subject(s) - electron beam ion trap , ion , excited state , atomic physics , spectral line , ground state , atomic electron transition , electron , physics , cathode ray , quantum mechanics , astronomy
We present visible to near‐infrared spectra of highly charged Yb (the atomic number 70) and W (74) obtained with a compact electron beam ion trap. By observing the dependence on the electron beam energy, the charge state that should be assigned to the observed lines is determined. For In‐like Yb 21+ and W 25+ and Sn‐like W 24+ , the experimental spectra are compared with theoretical calculations done by the CI+all‐order method. In each spectrum, the most prominent line is identified as the magnetic dipole transition from the first excited fine structure level to the ground level in the ground electronic configuration, 4f 3 for In‐like ions and 4f 4 for Sn‐like ions.