Authors: Lawler, J E.; Hartog, E A.; Sneden, C; Cowan, J J.

Source: Canadian Journal of Physics, Volume 86, Number 8, August 2008 , pp. 1033-1038(6)

Publisher: NRC Research Press

Abstract:

This Research Note provides a comparison of experimental atomic transition probabilities in Sm~II from two recent publications. Basic data of this type for rare-earth spectra, including Sm~II, are very difficult to determine using ab-initio theoretical methods. Experimental programs are underway in several laboratories to determine these data for ongoing astrophysical studies of the origins of the chemical elements. The two recent and nearly simultaneous publications, which were based on very different experimental methods, provide transition probabilities in good, but not perfect, agreement.PACS Nos.: 32.70.Cs, 32.70.Fw, 32.30.Jc

Dans cette note nous comparons les probabilités expérimentales de transition atomique dans le Sm~II provenant de deux expériences distinctes. Les données de base de ce type dans les spectres des terres rares, incluant Sm II, sont très difficiles à déterminer par calcul théorique ab initio. Des programmes expérimentaux sont en marche dans plusieurs laboratoires pour déterminer ces données qui sont utiles dans les études astrophysiques courantes sur l'origine des éléments chimiques. Ces deux publications récentes et presque simultanées, basées sur des techniques expérimentales très différentes, donnent des probabilités de transition qui s'accordent assez bien, mais pas parfaitement.[Traduit par la Rédaction]

Document Type: Research article

Publication date: 2008-08-01

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