High-spin structures of 51 121, 123, 125, 127Sb nuclei: Single proton and core-coupled states

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

doi:10.1140/epja/i2004-10119-4

2021 Impact factor 3.131

Hadrons and Nuclei

Eur. Phys. J. A (2005) 24: 39-49
https://doi.org/10.1140/epja/i2004-10119-4

High-spin structures of ₅₁ ^{121, 123, 125, 127}Sb nuclei: Single proton and core-coupled states

M. -G. Porquet¹^*, Ts. Venkova², R. Lucas³, A. Astier⁴^,1, A. Bauchet¹, I. Deloncle¹, A. Prévost⁴^,1, F. Azaiez⁵, G. Barreau⁶, A. Bogachev⁷, N. Buforn⁴, A. Buta⁵, D. Curien⁵, T. P. Doan⁶, L. Donadille⁸^,3, O. Dorvaux⁵, G. Duchêne⁵, J. Durell⁹, Th. Ethvignot¹⁰, B. P. J. Gall⁵, D. Grimwood⁹, M. Houry³, F. Khalfallah⁵, W. Korten³, S. Lalkovski¹¹, Y. Le Coz³, M. Meyer⁴, A. Minkova¹¹, I. Piqueras⁵, N. Redon⁴, A. Roach⁹, M. Rousseau⁵, N. Schulz⁵, A. G. Smith⁹, O. Stézowski⁴, Ch. Theisen³ and B. J. Varley⁹

¹ CSNSM IN2P3-CNRS and Université Paris-Sud, 91405, Orsay, France
² INRNE, BAS, 1784, Sofia, Bulgaria
³ Commissariat à l’Energie Atomique, CEA/Saclay, DSM/DAPNIA/SPhN, 91191, Gif-sur-Yvette Cedex, France
⁴ IPNL, IN2P3-CNRS and Université Claude Bernard, 69622, Villeurbanne Cedex, France
⁵ IReS, IN2P3-CNRS and Université Louis Pasteur, 67037, Strasbourg Cedex 2, France
⁶ CENBG, IN2P3-CNRS and Université Bordeaux I, 33175, Gradignan, France
⁷ JINR, Joliot-Curie 6, 141980, Dubna, Moscow region, Russia
⁸ School of Physics and Astronomy, University of Birmingham, B15 2TT, Birmingham, UK
⁹ Department of Physics and Astronomy, University of Manchester, M13 9PL, Manchester, UK
¹⁰ Commissariat à l’Energie Atomique, CEA/DIF/DPTA, Service de Physique Nucléaire, B.P. 12, 91680, Bruyères-le-Châtel, France
¹¹ Faculty of Physics, University of Sofia, 1126, Sofia, Bulgaria

^* e-mail: porquet@csnsm.in2p3.fr

Received: 26 October 2004
Accepted: 21 December 2004
Published online: 24 January 2005

Abstract

The ^{121,123,125,127}Sb 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 d _5/2 or g _7/2 proton to an excited Sn core involving either vibrational states or broken neutron pairs.

PACS: 21.60.Ev Collective models – / 23.20.Lv γ transitions and level energies – / 25.85.Ge Charged-particle-induced fission – / 27.60.+j 90 ⩽ A ⩽ 149 –

© Società Italiana di Fisica and Springer-Verlag, 2005