Branching ratio for the [ital M]1 decay of the 2 [sup 2][ital S][sub 1/2] state in one-electron krypton

We report a measurement of the lifetime of the 2 [sup 2][ital S][sub 1/2] state in one-electron krypton and a direct determination of the branching ratio for the [ital M]1 decay of this state. The branching-ratio measurement provides a sensitive test of the relativistic corrections to the decay rate...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 1993-02, Vol.47:2
Main Authors: Cheng, S., Berry, H.G., Dunford, R.W., Gemmell, D.S., Kanter, E.P., Zabransky, B.J., Livingston, A.E., Curtis, L.J., Bailey, J., Nolen, J.A. Jr
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
BEAMS
BRANCHING RATIO
CHARGED PARTICLES
DECAY
ENERGY LEVELS
ENERGY RANGE
EXCITED STATES
ION BEAMS
IONS
KRYPTON IONS
LIFETIME
MEV RANGE 10-100
MEV RANGE 664200 > Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
MULTICHARGED IONS
S STATES
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Summary:We report a measurement of the lifetime of the 2 [sup 2][ital S][sub 1/2] state in one-electron krypton and a direct determination of the branching ratio for the [ital M]1 decay of this state. The branching-ratio measurement provides a sensitive test of the relativistic corrections to the decay rate. The lifetime measurement yields (36.8[plus minus]1.4) ps and the branching ratio is found to be 0.356(15), both in good agreement with the theoretical values of 37.008 ps and 0.3643, respectively. From these measurements we also deduce the corresponding magnetic-dipole decay rate [ital A][sub [ital M]1]=9.68(55)[times]10[sup 9]s[sup [minus]1] and the two-photon decay rate [ital A][sub 2[ital E]1] =1.750(78)[times]10[sup 10] s[sup [minus]1].
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.47.903