High-spin structures of 121,123,125,127_541Sb nuclei: Single proton and core-coupled states

M.-G. Porquet (1) , Ts. Venkova (1) , R. Lucas , A. Astier (1) , A. Bauchet (1) , I. Deloncle (1) , A. Prévost (2) , F. Azaiez (3) , G. Barreau (4) , A. Bogachev , N. Buforn (2) , A. Buta (3) , D. Curien (3) , T.P. Doan , L. Donadille , O. Dorvaux (3) , G. Duchêne (3) , J. Durell , Th. Ethvignot , B.J.P. Gall (3) , D. Grimwood , M. Houry , F. Khalfallah (3) , W. Korten , S. Lalkovski , Y. Le Coz , M. Meyer (2) , A. Minkova , I. Piqueras (3) , N. Redon (2) , A. Roach , Marc Rousseau (3) , N. Schulz (3) , A.G. Smith , O. Stézowski (2) , Ch. Theisen , B.J. Varley

1 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
2 IPNL - Institut de Physique Nucléaire de Lyon
3 IReS - Institut de Recherches Subatomiques
4 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan

The 121,123,125,127Sb nuclei have been produced as fission fragments in three reactions induced by heavy ions: 12C + 238U at 90 MeV bombarding energy, 18O + 208Pb at 85 MeV, and 31P + 176Yb at 152 MeV. Their level schemes have been built from gamma rays detected using the EUROBALL III and IV arrays. High-spin states of 123,125,127Sb nuclei have been identified for the first time. Moreover isomeric states lying around 2.3 MeV have been established in 123,125,127Sb from the delayed coincidences between the fission fragment detector SAPhIR and the gamma array. All the observed states can be described by coupling a d5/2 or g7/2 proton to an excited Sn core involving either vibrational states or broken neutron pairs. PACS

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

M.-G. Porquet, Ts. Venkova, R. Lucas, A. Astier, A. Bauchet, et al.. High-spin structures of 121,123,125,127_541Sb nuclei: Single proton and core-coupled states. European Physical Journal A, 2005, 24, pp.39-49. ⟨10.1140/epja/i2004-10119-4⟩. ⟨in2p3-00023925⟩