High spin level schemes of 118,119 Ag are established for the first time by analyzing the high statistics γ-γ-γ and γ-γ-γ-γ coincidence data from the spontaneous fission of
Level structures of neutron-rich 140 Xe nucleus have been reinvestigated by using a triple γ coincidence study from the spontaneous fission of 252 Cf. Several new levels and transitions are identified. The previously observed s = +1 octupole band structure is confirmed and expanded. Another set of the △I = 2 positive-and negative-parity bands connected by strong E1 transitions is proposed as the s = −1 octupole band structure. Thus, the s = ±1 doublet octupole bands are completed in 140 Xe. The experimental B(E1)/B(E2) branching ratios indicate that the octupole correlations in 140 Xe are weak. The other characteristics of the s = ±1 octupole bands have been discussed.
The low spin states of 138 Nd have been reinvestigated via the 124 Te( 19 F,4n1p) reaction at a beam energy of 103 MeV. The quasi-one-phonon γ -vibrational band based on the 1013.7 keV level has been expanded and the quasi-two-phonon γ -vibrational band built on the 1842.7 keV level has been proposed. A systematic comparison supports our assignments for multiphonon γ -vibrational bands in 138 Nd. The characteristics of γ softness in 138 Nd have been discussed. Triaxial projected shell model calculations can well describe the rotational feature of the bands, but they fail to reproduce simultaneously the bandhead energies of the two γ -vibrational bands if a fixed triaxial deformation is assumed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.