Magnetic dipole transition rates from measured lifetimes of levels of Be-like and B-like argon ions
1998; American Physical Society; Volume: 58; Issue: 2 Linguagem: Inglês
10.1103/physreva.58.1111
ISSN1538-4446
Autores Tópico(s)Advanced Chemical Physics Studies
ResumoThe lifetimes of the ${1s}^{2}2s2p{}^{3}{P}_{2}$ level of Ar XV and ${1s}^{2}{2s}^{2}2p{}^{2}{P}_{3/2}$ of Ar XIV have been measured using metastable ${\mathrm{Ar}}^{14+}$ and ${\mathrm{Ar}}^{13+}$ ions produced by an electron cyclotron resonance ion source, which were subsequently separately captured into a Kingdon ion trap. The lifetime results are \ensuremath{\tau}(Ar XV, 2s2p ${}^{3}{P}_{2})=13.4(7)\mathrm{ms}$ and \ensuremath{\tau}(Ar XIV,$2p{}^{2}{P}_{3/2})=9.12(18)\mathrm{ms}.$ Transition rates derived from the measured lifetimes differ significantly from both relativistic and nonrelativistic calculations of the $2s2p{}^{3}{P}_{1}{--}^{3}{P}_{2}$ $M1$ transition rate of Ar XV, but are in reasonable agreement with calculations for the $2p{}^{2}{P}_{1/2}{--}^{2}{P}_{3/2}$ $M1$ rate of Ar XIV.
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