Abstract
X-ray spectra emitted in the radioactive decay of 17.7y 145Pm and 1.9y 171Tm were studied using a three-parameter technique for XX · t coincidence measurements. The following L2 and L3 subshell X-ray fluorescence yields, ω2, ω3, Coster-Kronig transition probabilities, f23, and radiative decay branching ratios, s2, s3, were determined for Nd (Z = 60) and Yb (Z = 70); At Z = 60, ω3 = 0.108 ± 0.010, ω2 = 0.128 ± 0.018, f23 = 0.123 ± 0.013, s3 = 0.178 ± 0.006, and s2 = 0.205 ± 0.010. At Z = 70, ω3 = 0.227 ± 0.022, ω2 = 0.217 ± 0.030, f23 = 0.141 ± 0.007, s3 = 0.175 ± 0.003, and s2 = 0.197 ± 0.004. These results are compared with available theoretical calculations.
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