Hyperfine induced intensity redistribution in In II

Summary, in English

We present a theoretical investigation of the hyperfine structure of the 5s5d D-3(2)-5s4f F-3(2,3)0 transitions in In II. Earlier work has failed in determining hyperfine constants for the upper levels of these transitions. We show that this is due to strong off-diagonal hyperfine interaction, which not only changes the position of the individual hyperfine lines but also introduces large intensity redistributions among the different hyperfine levels. We present hyperfine dependent gf-values and show that off-diagonal hyperfine interaction reduces some of the gf-values by two orders of magnitude, while others are increased by up to more than a factor of 6. We also discuss the influence on the hyperfine structure of an accurate representation of the level-splitting of the 5s4f configuration. We show that the hyperfine interaction in F-3(3)0 and F-1(3)0 is very hard to determine accurately even in a large-scale calculation, and we derive a semi-empirical method for adjusting our results using an experimentally known, diagonal hyperfine constant for 5s4f F-1(3)0. The resulting theoretical synthetic spectra reproduce the experimental values to high accuracy and facilitate the identification of all observed lines.

• Author: Jon Grumer; Martin Andersson; Tomas Brage
• Department/s: Department of Physics
• Publishing year: 2010
• Language: English
• Publication/Series: Journal of Physics B: Atomic, Molecular and Optical Physics
• Volume: 43
• Issue: 7
• Links: http://dx.doi.org/10.1088/0953-4075/43/7/074012
• Document type: Journal article
• Publisher: IOP Publishing
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0953-4075