Lifetime measurements in $^{138}$Nd

F.L. Bello Garrote , A. Görgen , C. Mihai , T. Abraham , L. Crespo Campo , J.P. Delaroche (1) , D. Filipescu , N.M. Florea , I. Gheorghe , D.G. Ghita , M. Girod (1) , T. Glodariu , K. Hadyńska-Klȩk , M. Klintefjord , J. Libert (1) , R. Lica , T. Marchlewski , N. Marginean , R. Marginean , I. Mitu , A. Negret , C.R. Nita , F. Nowacki (2) , A. Olacel , S. Pascu , T. Renstrøm , E. Sahin , S. Siem , J. Srebrny , A. Stolarz , L. Stroe , S. Toma , T.G. Tornyi , A. Tucholski

1 DAM - Direction des Applications Militaires
2 IPHC - Institut Pluridisciplinaire Hubert Curien

Lifetimes of several short-lived excited states in Nd138 were measured with the ROSPHERE array at IFIN-HH, Bucharest, using the recoil-distance Doppler shift technique following the Sb123(F19,4n) reaction. The resulting electromagnetic transition probabilities are compared to large-scale shell model calculations and to constrained Hartree-Fock-Bogoliubov calculations with the Gogny D1S interaction, configuration mixing, and a five-dimensional collective Hamiltonian formalism. The onset of collectivity in Nd isotopes below the N=82 shell closure and the deformation induced by the alignment of protons and neutron holes in the h11/2 orbitals are discussed.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

F.L. Bello Garrote, A. Görgen, C. Mihai, T. Abraham, L. Crespo Campo, et al.. Lifetime measurements in $^{138}$Nd. Phys.Rev.C, 2018, 97 (6), pp.064310. ⟨10.1103/PhysRevC.97.064310⟩. ⟨hal-01833724⟩