Search for spatial anisotropy in beta-decays

Abstract

Theoretically a possibility of covariance violation in weak decays is not ruled out from the first principles, while there are some models predicting non-covariance revealed in weak interactions. The experimental evidence for isotropy violation in $\beta$-decays was recently reported. We present a study of the dependence of electron flow rate and $\beta$-electron energy in the decay of $S{r}^{90}$ with respect to the direction of electron emission. An upper limit of $1.4\cdot 10^{-5}$ on directional dependence of $\beta$-electron energy was obtained.

8 pages, 5 figures