Probing the maximally deformed light rare-earth region around the drip-line nucleus $^{130}$Sm

M. Petri , E.S. Paul , P.J. Nolan , A.J. Boston , R.J. Cooper , M.R. Dimmock , S. Gros , B.M. Mcguirk , H.C. Scraggs , G. Turk , B. Rossé (1) , M. Meyer (1) , N. Redon (1) , C. Schmitt (1) , O. Stézowski (1) , D. Guinet (1) , P. Lautesse (1) , G. de France (2) , S. Bhattacharyya (2) , G. Mukherjee (2) , F. Rejmund (2) , M. Rejmund (2) , H. Savajols (2) , J.N. Scheurer (3) , A. Astier , I. Deloncle (4) , A. Prévost (4) , B.M. Nyako , J. Gal , J. Molnar , J. Timar , L. Zolnai , K. Juhász , V.F.E. Pucknell , R. Wadsworth , P. Joshi , G. La Rana , R. Moro , M. Trotta , E. Vardaci , G. Hackman , G. Ball

1 IPNL - Institut de Physique Nucléaire de Lyon
2 GANIL - Grand Accélérateur National d'Ions Lourds
3 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
4 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse

The neutron deficient rare-earth nuclei of the A~130 region are of particular interest since highly deformed prolate ground states are expected. Indeed these nuclei are predicted to show maximal ground-state deformations of β2 ~ 0.40 (axis ratio of 3:2), comparable to the deformation deduced for superdeformed cerium isotopes at high spin. A fusion–evaporation experiment was performed with radioactive ion beams at GANIL in October 2004 which had the goal to reach very proton-rich exotic nuclei located near the proton drip-line. A radioactive 76Kr beam, delivered by the SPIRAL facility, was used to bombard a thin 58Ni target. Emitted γ-rays were detected by the EXOGAM γ-ray spectrometer which was, for the first time, coupled with both the DIAMANT charged-particle array and the VAMOS spectrometer.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

M. Petri, E.S. Paul, P.J. Nolan, A.J. Boston, R.J. Cooper, et al.. Probing the maximally deformed light rare-earth region around the drip-line nucleus $^{130}$Sm. International Conference on Finite Fermionic Systems: Nilsson Model 50 Years, Jun 2005, Lund, Sweden. pp.214-215, ⟨10.1088/0031-8949/2006/T125/057⟩. ⟨in2p3-00089856⟩