Abstract
We describe a simple method employing a Ge(Li) detector for determining total internal conversion coefficients. This method can significantly increase the number of accurately known conversion coefficients of high-multipolarity ( ΔL ≥ 3) transitions. When an isomer de-excites via two transitions in cascade, one of which has a small total conversion coefficient (determined from theory or experiment), it is possible to deduce the other (high) conversion coefficient by measuring relative photon intensities only. This method is demonstrated by measuring the total conversion coefficient of the 88.5 keV, M4 transition occurirng in the 11 2 − (120 d 123 Te isomer) → 3 2 + (159.0 keV level) → 1 2 + ( 123 Te ground state) cascade. The experimental value is 1076 ± 42 compared to the theoretical value of 1149.
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