Institut de recherche sur les lois fondamentales de l'Univers

Direction de la recherche fondamentale

Résumé du preprint DAPNIA-02-266

DAPNIA-02-266
High-spin study of odd-A 49In isotopes beyond the neutron mid-shell.
R.Lucas, M.G.Porquet,Ts. Venkova,I.Deloncle, M. Houry, Ch.Theisen, A.Astier, A. Bauchet, S. Lalkowski, G. Barreau, N. Buforn, T.P. Doan, L. Donadille, O. Dorvaux, J. Durell, Th. Ethvignot, B.J.P. Gall, D. Grimwood, W. Korten, Y. Le Coz, M. Meyer, A. Minkova, A. Prévost, N. Redon, A. Roach, N. Schulz, O. Stézowski, A.G. Smith, B.J. Varley
The 115,117,119,121 In nuclei have been produced as fission fragments in three reactions induced by heavy ions 12C+238U at 90 MeV bombarding energy, 18O+208Pb reaction 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 117, 119, 121In nuclei have been identified for the first time. Moreover isomeric states lying around 2.5 MeV have been established in 119,121In from the delayed coincidences between the fission fragment detector SAPhIR and the gamma array. Most of the observed states can be described by coupling a proton g9/2 hole to a Sn core, while the intruder band based on an orbital from the p[g7/2/d5/2] sub-shells behaves as the ground state band of neighbouring Cd isotopes.

DAPNIA-02-266

High-spin study of odd-A 49In isotopes beyond the neutron mid-shell.

R.Lucas, M.G.Porquet,Ts. Venkova,I.Deloncle, M. Houry, Ch.Theisen, A.Astier, A. Bauchet, S. Lalkowski, G. Barreau, N. Buforn, T.P. Doan, L. Donadille, O. Dorvaux, J. Durell, Th. Ethvignot, B.J.P. Gall, D. Grimwood, W. Korten, Y. Le Coz, M. Meyer, A. Minkova, A. Prévost, N. Redon, A. Roach, N. Schulz, O. Stézowski, A.G. Smith, B.J. Varley

The 115,117,119,121 In nuclei have been produced as fission fragments in three reactions induced by heavy ions 12C+238U at 90 MeV bombarding energy, 18O+208Pb reaction 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 117, 119, 121In nuclei have been identified for the first time. Moreover isomeric states lying around 2.5 MeV have been established in 119,121In from the delayed coincidences between the fission fragment detector SAPhIR and the gamma array. Most of the observed states can be described by coupling a proton g9/2 hole to a Sn core, while the intruder band based on an orbital from the p[g7/2/d5/2] sub-shells behaves as the ground state band of neighbouring Cd isotopes.