The decay of 151Gd to the levels of 151Eu

Atomic masses of rare earth isotopes145Pm,145Sm and151Gd, derived from decay measurements of145Sm and151Gd

“…The present decay data are listed in Table 2. We have observed five new y-rays and the intensity of the 239 keV y-ray to be much smaller than quoted earlier [21,23,24]. This implicates for the 239 keV transiton the M1 characterisation.…”

“…Two PK-ratios were measured in this decay. We have investigated the K-capture branches feeding the 354 and 243 keV states in 151Eu by comparing the 354 [23] and 243 keV ),-ray intensities. We also investigated the Kcapture to the 350 and 243 keV states in ~SlEu.…”

Orbital electron capture by the nucleus

“…(Salem et al 1974) QEC value from Auble (1971b ' Marelius(1967), 0. 750+0:0,10 16 Adarnowcz ('9,68, 0.9 +0' 0Z 13 ' Vatai(1968a) Ford (1970).…”

K-electron capture probabilities in the decays of Gd151 and Dy159

“…Thus an op- portunity exists here for comparing the allowed and forbidden transitions in the same nucleus. Using the theoretical dependence of PK on the decay energy, QEc, for an allowed transition, one can also determine Qec to a better accuracy than in the earlier determinations [4]. The measurement of PK in the transition to the 307.4 keV level is also utilized in the present study to establish that the spin of the level is 7/2 unambiguously.…”