Open AccessHyperfine structure of the ground state in singly ionized manganese
Author(s) -
BlackwellWhitehead R. J.,
Toner A.,
Hibbert A.,
Webb J.,
Ivarsson S.
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.09597.x
Subject(s) - hyperfine structure , physics , ground state , atomic physics , spectroscopy , manganese , fine structure constant , ionization , wavelength , cathode , magnetic dipole , dipole , ion , optics , chemistry , electron , organic chemistry , quantum mechanics
We report the first experimental measurements and theoretical calculations for the hyperfine splitting of the 3d 5 4s ground state of Mn ii . The hyperfine structure constants were determined using Fourier transform spectroscopy with a hollow cathode discharge lamp. The uncertainties in the magnetic dipole constants, A , are between 3 × 10 −4 and 5 × 10 −4 cm −1 . Extensive configuration interaction calculations of the hyperfine splitting of the a 7 S 3 ground state have been carried out to compare with the experimental measurements. In addition, we give wavelengths for three resonant transitions to the ground state of Mn ii , accurate to a few parts in 10 8 . These wavelengths are of interest in astrophysical applications such as studies of the time variation of the fine structure constant.