Lifetimes of the Metastable Auto-Ionizing $(1 s 2 s 2 p) {}^{4}P_{\frac{5}{2}}$ States of Lithiumlike $F^{6 +}$ and $O^{5 +}$ Ions

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1 July 1971

journal article
research article
Published by American Physical Society (APS) in Physical Review A

Vol. 4 (1) , 122-125
https://doi.org/10.1103/physreva.4.122

Abstract

Electrons emitted from foil-excited beams of

F^{6 +}

and

O^{5 +}

ions (2.5-20 MeV) have been energy analyzed and their number measured versus distance from the foil. Lines associated with the

(1 s 2 s 2 p) {}^{4}P_{\frac{5}{2}}

level and with higher quartet levels are observed to decay at various rates. Life-times for the

(1 s 2 s 2 p) {}^{4}P_{\frac{5}{2}}

state in

F^{6 +}

and

O^{5 +}

are found to be (1.5 ± 0.1) and (2.5 ± 0.3) ×

10^{- 8}

sec, respectively. The latter disagrees with earlier experimental work and with theoretical estimates.

Keywords

This publication has 20 references indexed in Scilit:

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