par Gizon, Andrée;Weiss, Béatrice;Genevey, J.;Gizon, Jean;Barci, Vittorio;Cǎta-Danil, Gh;Paris, Pamela;Liang, C.F. C.F.;Dionisio, J.S. J.S.;Vieu, Ch;Lagrange, J.M. J.M.;Pautrat, Michèle;Vanhorenbeeck, Jean 
;Zolnai, L.;Arias, José J.M.;Barea, José;Droste, Ch
Référence European Physical Journal A. Hadrons and Nuclei, 8, 1, page (41-58)
Publication Publié, 2000
;Zolnai, L.;Arias, José J.M.;Barea, José;Droste, ChRéférence European Physical Journal A. Hadrons and Nuclei, 8, 1, page (41-58)
Publication Publié, 2000
Article révisé par les pairs
| Résumé : | The decay of 123Ba to 123Cs has been studied with mass-separated sources. Singles spectra of γ-rays, X-rays and conversion electrons as well as γ - γ - t, γ - e- - t, and X - e- - t coincidences were recorded. A level scheme of 123Cs has been constructed including 26 new excited states and 82 transitions. The existence of a Iπ = 11/2-, T1/2 = 1.7 s isomer, bandhead of the h11/2 band, is confirmed. Its excitation energy equals 156.3 keV. A new T1/2 = 114 ns isomer has been established at 232 keV using the in-beam recoil catcher technique. It is assigned to the Iπ = 9/2+ bandhead of the πg9/2 band. Collective bands based on the 1/2+ ground state and first 3/2+ excited state are proposed. The level structure is described in the frame of the interacting boson-fermion and core-quasiparticle coupling models. |
