https://doi.org/10.1140/epja/i2006-10046-4
Nuclear Structure and Reactions
A new high-spin level scheme for 149Nd from a fusion-fission reaction
1
CSNSM, IN2P3-CNRS/Université Paris-Sud, 91405, Orsay, France
2
Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 1784, Sofia, Bulgaria
3
Commissariat à l'Énergie Atomique, CEA/DSM/DAPNIA/SPhN, 91191, Gif-sur-Yvette Cedex, France
4
Department of Physics and Astronomy, University of Manchester, M13 9PL, Manchester, UK
Received:
1
March
2006
Accepted:
15
May
2006
Published online:
19
June
2006
A new high-spin level scheme of 149Nd has been identified, which is at variance with the one previously published. The states have been populated in the 12C + 238U fusion-fission reaction at 90MeV bombarding energy and the emitted γ-transitions were detected using the Euroball III array. The yrast band is built on the νi 13/2 sub-shell as in the neighbouring isotones. Moreover, sign of octupole vibrations has been found in 149Nd, as well as in 147Ce, where several new states decaying to the yrast band have been newly observed.
PACS: 21.10.-k Properties of nuclei; nuclear energy levels – / 21.10.Re Collective levels – / 23.20.Lv Gamma transitions and level energies – / 27.60.+j 90 ⩽ A ⩽ 149 –
© Società Italiana di Fisica and Springer-Verlag, 2006
