Tests of internal - conversion theory with precise γ - and x - ray spectroscopy : the case of 119
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چکیده
In the past year we continued the study of the internal conversion coefficient (ICC) of the 65.7keV M4 transition in Sn, which we described in last year’s annual report. This is the latest in a series of precision measurements of the ICCs of high-multipolarity transitions to establish the accuracy of calculated ICCs and, in particular, to discriminate between the theoretical prescriptions used to deal with the atomic vacancy left by the emitted electron. The Sn case has a lower Z than any case we have examined so far. The transition originates from the 293.1-day isomeric state at 89.5 keV in Sn, which decays 100% by cascade via a 65.7-keV M4 and a 23.9-keV M1/E2 transition. Since the latter cannot convert in the K shell, the K x rays in the measured photon spectrum from this decay scheme are exclusively from the M4 transition. Consequently, the K conversion coefficient for the M4 transition can be determined from the equation
منابع مشابه
Tests of internal - conversion theory with precise γ - and x - ray spectroscopy : Selection of new cases
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تاریخ انتشار 2012