Levels in 107Rh

Gamma Rays of Short-lived Ruthenium Nuclides Produced in the Spontaneous Fission of 252Cf

“…The absolute intensity of 27.8 ± 2.8% given in Table 2 Table 2). The 194-keV yray was also observed in the decay of 107 Ru [13,20,24], but the y-ray measured by this SISAK separation is almost ascribed to 109 Ru by considering the halflives of 107 Ru (3.75 min) and 109 Ru (34.5 s). The 250 keV y-ray from 109 Ru overlaps with the same energy y-ray from 1 n Ru.…”

“…Figure 2 shows the y-ray spectrum of the ruthenium fraction (organic phase) after the solvent extraction. Most of the y-ray peaks can be assigned to the ruthenium nuclides with mass number 107, 108, 109, 110, 111 and 112 or their daughters as given in the literature [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. 107 Ru Table 2 gives the decay data on the y-rays following the ß~ decay of 107 The absolute intensities, Iy in Table 2, were obtained by taking into account the y-ray yields of 252 Cf fission given by Wilhelmy [24] and the cumulative yields for the ruthenium nuclides by Rider [27].…”

“…The y-rays with energies of 211, 250, 304 and 381 keV observed in this work are assigned to the ß~ decay of 11 …”

“…The half-life of 3.0 s for the 304 keV assigned to 112 Ru [20] is not correct and the y-ray belongs to 11 [20] for 107 Ru and 108 Ru, Ref. [28] for 109 Ru and 110 Ru, and Ref.…”

Experimental Beta-decay energies of very neutron-rich fission products with 107?A?109

“…A detailed measurement of the excited levels and the transitions in the daughter nucleus l~ has been performed in 1986 by Kaffrell et al [11]. From the /?7-matrix of the present study, the /?-spectra in coincidence with 14 different 7-transitions depopulating six excited levels in l~ were evaluated.…”