Nuclear data sheets for A = 87

The proton g9/2 isomer in theN=50 nucleus87Rb and M2 transition rates in85,87Rb

“…The 77-coincidence measurements confirm the level ordering ( Fig. 1) known from previous work [10,11]. The 402.6 keV and 1175.3 keV 7-rays have been observed in the corresponding coincidence spectra gated on the 1175 keV and 403 keV transitions, respectively, but we found no further 7-ray in coincidence with the cascade 1175.3 keV-402.6 keV.…”

New advances in the determination of the 87Rb shape factor function

“…As a general rule, β-particle emitters of maximum point energies lower than 450 keV are practically undetectable in water. This is the case of 87 Rb, for which the maximum point energy E 0 is 283 keV [28]. Therefore, apart from the maximum point of the logarithmic beta distribution, we should seek for other observables.…”

New limits on naturally occurring electron capture of123Te

“…Single beta decay or electron capture is expected to occur in nine isobaric doublets or triplets existing in nature [1]. It has been actually detected in seven of them [2,3,4,5,6,7,8,9,10,11,12,13], while no evidence has been found for beta decay of the 9 − excited state of 180 Ta [14]. More complex is the situation [15,16,17,18] for the second forbidden unique electron capture (EC) of 123 Te to the ground state of 123 Sb, with a transition energy of 53.3 ± 0.2 keV (Q EC ).…”