Winkelkorrelationsmessungen an88Sr

Abstract

The γγ ande − KL γ directional correlations have been measured for the (898–1836) keV cascade in88Sr following the decay of88Y. The observed correlation coefficients areA22(γγ)=−0.0784±0.0042 andA22(e − KL γ)=0.0102±0.0046. The γγ experiment is consistent with a mixing ratio δ(γ)=0.009±0.005 for the 898 keV transition. Using the result of thee − KL γ experiment the most probable value of the ratio of the penetration matrix element to the normal γ-ray matrix element was determined to be η=0.03±0.30 showing a normal conversion process. This penetration parameter agrees with a hindrance factorHW(E1)=2.1 · 10−3 for theE1 transition.