Deexcitation of the 931.1 keV 2₂⁺-State of Cd¹⁵²

Abstract

The gamma-ray spectrum and the conversion-electron spectrum are measured in the decay of the Tb 152 activity. The L -subshell electron lines of the 586.7 keV 2 2 + →2 1 + transition are separated by the ion-free beta-ray spectrometer. The M1-E2 mixing ratio, δ 2 , and the dimensionless ratio X of E0-E2 mixing of the 586.7 keV transition are obtained to be δ 2 ≦0.16 and 0.034≦ X ≦0.038, respectively. The E2 branching ratio B (E2; 2 2 + →0 g + ): B (E2; 2 2 + →2 1 + ): B (E2; 2 2 + →0 1 + ) is determined to be 0.023 : 1.0 : 5.6.