“…Conversion-electron spectra.-The absolute and relative internal conver sion coefficients from K and L shells provide the most definitive information for determining the multipolarity of transitions in moderate-to high-Z nuc1ei.6 This type of measurement has received significant attention during the past several years, especially at Munich (158-166) , Riga (230-237), Studsvik(202)(203)(204)(205)(206)(207)(208)(209), Moscow(225)(226)(227), and Leningrad(228,229). The Munich and Riga spectrometers have internal sources in vacua such that a low-divergence electron beam is extracted through a reactor shield.…”