The Bahcall correction factors X L/K and X M/L for L]K and M/L electron capture ratio respectively are calculated including the I-Iartree-Fock (I-IF) rearrangement. The rearrangement takes into account that the atom after the electron capture is not in the HF ground state. The selfconsistent single electron orbits for the excited states with a hole in the K, L or M shell are calculated using the Herman-Skillman and the Froese HF codes. The rearrangement changes the correction factor into the right direction, but the reduction is too small. Only for very light atoms the alteration is larger than 1% and therefore it is in general smaller than the present experimental errors.
The fi-spectrum of naturally occuring lS7Rhenium was measured using the vapour of (CsHs)2ReH as a gaseous source in a "walless" proportional counter. The counter was enclosed in a glass envelope and was operated at temperatures up to 150 ~ The Kurie plot was found to be a straight line between 1,1 keV and the endpoint at (2.654-0.04) keY.
Einleitung
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