Experimental Study of Weak Magnetism and Second-Class Interaction Effects in the $β$ Decay of Polarized ${}^{19}{Ne}$

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8 December 1975

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

Vol. 35 (23) , 1566-1570
https://doi.org/10.1103/physrevlett.35.1566

Abstract

The angular distribution of positrons emitted in the decay of polarized

{}^{19}{Ne}

has been measured as a test for the second-class weak interaction. The

β

asymmetry parameter varies linearly with the

β

energy with slope

{(\frac{dA}{dE})}_{\exp} = (- 0.65 \pm 0.15) %

Me

V^{- 1}

. This result requires a second-class form factor comparable to the weak-magnetism term.

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