g-factors for 2+ states of doubly even nuclei (Ge, Se, Mo, Ru, Pd, Cd and Te)

Systematics of Gyromagnetic Ratios of the 21+ States in Even Ge Isotopes

“…2. Indeed, the measurement of g(2t; 70Ge) = 0·38±0·08 obtained by the Uppsala workers (Fahlander et al 1977), when coupled with their reanalysis of the earlier data (Heestand et al 1969) for g(2i) in 72,74, 76 Ge, appears more in keeping with the present findings than those of the Oxford group. [It may be of interest in this regard that an early estimate of the 'quenching' of g-factors relative to that of the expected Z/A value (Greiner 1966) for vibrational nuclei (using standard pairing parameters) predicts the gyromagnetic ratios of the 2t levels in these even Ge isotopes to be reduced even more than found empirically in the present work (i.e .…”

“…These results are compared in Fig. 2 with those of the earliest workers (Heestand et al 1969), with the reanalysis of these same data by the Uppsala group (Fahlander et al 1977), and with the collective Z/A estimate. The marked departures of both the original data set and its reanalysis from the hydrodynamical expectation for the mass dependence of g(2i) in these even Ge isotopes is evident; departures which suggested possible 'anomalous' nuclear structure features might be attributed to the first-excited states of these even-even Ge isotopes.…”

“…function of isotopic mass. The linear least-squares fit to the present data is given by the solid line and 9 = Z/A by the dashed line; dotted lines represent the mass dependencies of (i) the results of Heestand et al (1969) and (ii) these results as reanalysed by Fahlander et al (1977).…”

“…Both the initially reported measurements (Heestand et al 1969) and their subsequent reanalysis (Hubler et al 1974) displayed systematic mass dependencies of the g-factors of these levels which disagreed markedly with that expected for these ostensibly collective states. More recently, however, the measurement of g(2t; 70Ge) by the Uppsala group (Fahlander et al 1977) and their reanalysis of the earlier data set for 72-76 Ge (Heestand et al 1969), as well as an experimental study of the gyromagnetic ratios of the 2t level in all four Ge isotopes by the Oxford group (Pakou et al 1984), found the trend exhibited to be more in keeping with the hydrodynamical 9 = Z/A expectation. While the findings of the former works might tend to suggest that 'anomalous' nuclear structure features could be attributed to the 2t states of these Ge isotopes, the latter investigators indicated that such an interpretation did not appear warranted on the basis of their findings.…”

Low-energy structure of the even-ARu96−104isotopes viaTaylor1, Gürdal2, Kumbartzki3 et al. 2011Phys. Rev. C

“…Measurements of g(2 + 1 ; 98 Ru) and g(2 + 1 ; 104 Ru) were reported by Heestand et al [6] who used an ion implantation perturbed angular correlation (IMPAC) technique in which both the transient and static hyperfine fields affected the extracted g factors. These experiments were performed at a time when little work had been done to accurately parameterize the transient field (TF) strength experienced by ions traversing a ferromagnetic foil.…”