Electromagnetic Transitions in ${(1 f_{\frac{7}{2}})}^{3}$ Nuclei: Lifetimes of the Low-Lying States of ${}^{43}{Ca}$

Publisher Website

1 September 1972

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

Vol. 6 (3) , 784-791
https://doi.org/10.1103/physrevc.6.784

Abstract

The mean lives of the three lower levels in

{}^{43}{Ca}

have been measured with a new version of the Doppler-shift-attenuation method, using a gas as target and absorber. The reaction was

{}^{40}{Ar} (α, n) {}^{43}{Ca}

at energies ranging from 5.5 to 8 MeV. The results for the mean lives are the following:

τ_{m} = 50 \pm 4, 116 \pm 5, and 66 \pm 4

psec for the 372-, 593-, and 990-keV levels, respectively. In addition, the relative intensity of

γ

rays from the decay of the

{}^{43}{Ca}

levels have been obtained at

E_{α} = 8

MeV. Electron-conversion measurements have also been carried out for the transitions 372→0 and 593→372 keV, which turn out to be almost pure

M 1

.

Keywords

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