Eur. Phys. J. A
Volume 15, Number 3, November 2002
Page(s) 315 - 323
Published online 19 November 2002
Eur. Phys. J. A 15, 315-323 (2002)
DOI: 10.1140/epja/i2002-10042-8

High-spin study of odd- $\mth{A}$ $\chem{{}_{49}In}$ isotopes beyond the neutron mid-shell

R. Lucas1, M.-G. Porquet2, Ts. Venkova3, I. Deloncle2, M. Houry1, Ch. Theisen1, A. Astier4, A. Bauchet2, S. Lalkovski2, G. Barreau5, N. Buforn4, T.P. Doan5, L. Donadille6, O. Dorvaux7, J. Durell8, Th. Ethvignot9, B.P.J. Gall7, D. Grimwood8, W. Korten1, Y. Le Coz1, M. Meyer4, A. Minkova2, 10, A. Prévost4, N. Redon4, A. Roach8, N. Schulz7, A.G. Smith8, O. Stézowski4 and B.J. Varley8

1  Commissariat à l'Énergie Atomique, CEA/Saclay, DSM/DAPNIA/SPhN, 91191 Gif-sur-Yvette Cedex, France
2  CSNSM, IN2P3-CNRS and Université Paris-Sud, 91405 Orsay, France
3  INRNE, BAS, 1784 Sofia, Bulgaria
4  IPNL, IN2P3-CNRS and Université Claude Bernard, 69622 Villeurbanne Cedex, France
5  CENBG, IN2P3-CNRS and Université Bordeaux I, 33175 Gradignan, France
6  School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, United Kingdom
7  IReS, IN2P3-CNRS and Université Louis Pasteur, 67037 Strasbourg, France
8  Department of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, United Kingdom
9  Commissariat à l'Energie Atomique Bruyères-le-Châtel, CEA/DIF/SPN, BP12, 91680 Bruyères-le-Châtel, France
10  University of Sofia, Faculty of Physics, 1126 Sofia, Bulgaria

(Received: 24 May 2002 / Published online: 19 November 2002)

The $\chem{{}^{115,117,119,121}In}$ nuclei have been produced as fission fragments in three reactions induced by heavy ions: $\chem{{}^{12}C}$ + $\chem{{}^{238}U}$ at 90 MeV bombarding energy, $\chem{{}^{18}O}$ + $\chem{{}^{208}Pb}$ reaction at 85 MeV, and $\chem{{}^{31}P}$ + $\chem{{}^{176}Yb}$ at 152 MeV. Their level schemes have been built from gamma-rays detected using the EUROBALL III and IV arrays. High-spin states of $\chem{{}^{117,119,121}In}$ nuclei have been identified for the first time. Moreover, isomeric states lying around 2.5 MeV have been established in $\chem{{}^{119,121}In}$ 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 $\chem{Sn}$ core, while the intruder band based on an orbital from the $\pi[g_{7/2}/d_{5/2}]$ sub-shells behaves as the ground-state band of neighbouring Cd isotopes.

21.60.Ev - Collective models.
23.20.Lv - Gamma transitions and level energies.
25.85.Ge - Charged-particle-induced fission.
27.60.+j - $90\leq A \leq 149$ .

© Società Italiana di Fisica, Springer-Verlag 2002

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