Lifetime measurement of theπg9/2isomer in79As

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1 August 1998

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

Vol. 58 (2) , 1318-1320
https://doi.org/10.1103/physrevc.58.1318

Abstract

The lifetime of the 773 keV

π g_{9 / 2}

isomer in

^{79} As

has been measured to be

T_{1 / 2} = 0.87 (6) μ s

by taking coincidences between

γ

rays and projectilelike fragments produced in deep-inelastic collisions of

^{198} Pt +^{76} Ge

(635 MeV). The

{B (M 2, 9 / 2}^{+} \to {5 / 2}^{-})

value for the 542 keV transition in

^{79} As

is found to be 0.042(3) Weisskopf units (W.u.). An identification method of nuclei produced in deep-inelastic collisions is also described.

Keywords

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