$\gamma$-ray Spectroscopy of Proton Drip-Line Nuclei in the A~130 Region using SPIRAL beams

O. Stézowski (1) , D. Guinet (1) , Ph. Lautesse (1) , M. Meyer (1) , N. Redon (1) , B. Rossé (1) , Ch. Schmitt (1) , P. J. Nolan , A. J. Boston , R. Cooper , M. Dimmock , S. Gros , B. Mcguirck , E. S. Paul , M. Petri , H. Scraggs , G. Turk , G. de France (2) , S. Bhattacharyya (2) , G. Mukherjee (2) , F. Rejmund (2) , M. Rejmund (2) , H. Savajols (2) , J. N. Scheurer (3) , B. M. Nyakó , J. Gál , J. Molnár , J. Timár , L. Zolnai , A. Astier (4) , I. Deloncle (4) , M. G. Porquet (4) , A. Prévost (4) , K. Juhasz , 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

A fusion-evaporation experiment has been performed with a SPIRAL 76Kr radioactive beam in order to study the deformation of rare-earth nuclei near the proton drip-line. The experimental setup consisted in the EXOGAM gamma-array, coupled to the light-charged particles (LCP) DIAMANT detector and to the VAMOS heavy-ion spectrometer. The difficulties inherent to such measurements are enlightened. The coupling between EXOGAM and DIAMANT has been used to decrease the huge background caused by the radioactivity of the beam. It further permits assigning new gamma-ray transitions to specific residual nuclei. A gamma-ray belonging to the 130Pm level scheme has thus been observed for the first time.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

O. Stézowski, D. Guinet, Ph. Lautesse, M. Meyer, N. Redon, et al.. $\gamma$-ray Spectroscopy of Proton Drip-Line Nuclei in the A~130 Region using SPIRAL beams. Nuclear Physics and Astrophysics: From Stable Beams to Exotic Nuclei, Jun 2008, Cappadocia, Turkey. pp.166-171, ⟨10.1063/1.3039823⟩. ⟨in2p3-00358543⟩