On the multipole mixing ratio of the 365 keV $\gamma$-transition in ${}^{129}$Ba

Abstract

The $E2/M1$ multipole mixing ratio ($\delta$), reported by J. Gizon et al. Phys. Rev. C 17, 596 (1978), for 365 keV $\gamma$-transition in ${}^{129}$Ba is reevaluated and found altered. Experimentally determined angular distribution coefficients indicate a large E2 admixture in the 365 keV $\gamma$-ray. Indeed, it is found in better agreement with the reported linear polarization value for this $\gamma$-ray.