Experiments on Parity Nonconservation in Nuclear Forces II. Gamma Transitions inTl203andAs75

Publisher Website

1 December 1971

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

Vol. 4 (6) , 2218-2223
https://doi.org/10.1103/physrevc.4.2218

Abstract

The circular polarization

P_{γ}

of the 279-keV

γ

ray in

{}^{203}{Tl}

and the 401-keV

γ

ray in

{}^{75}{As}

has been measured using a Compton polarimeter and a current-measuring technique. The result for

{}^{203}{Tl}

is

P_{γ} = (2 \pm 5) \times 10^{- 6}

. For

{}^{75}{As}

evidence for a nonzero circular polarization,

P_{γ} = (- 0.6 \pm 0.2) \times 10^{- 4}

, is found. The role of the electron-capture bremsstrahlung in the case of

{}^{75}{As}

is discussed.

Keywords

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