Eur. Phys. J. A 15, 93-97 (2002)
DOI: 10.1140/epja/i2001-10233-9

Probing shell structure in neutron-rich nuclei with in-beam -spectroscopy

F. Azaiez¹, M. Belleguic¹, D. Sohler², M. Stanoiu³, Zs. Dombrádi², O. Sorlin¹, J. Timár², F. Amorini¹, D. Baiborodin⁴, A. Bauchet⁵, F. Becker⁶, C. Borcea⁷, C. Bourgeois¹, Z. Dlouhy⁸, C. Donzaud¹, J. Duprat¹, D. Guillemaud-Mueller¹, F. Ibrahim¹, M.J. Lopez³, R. Lucas⁹, S.M. Lukyanov⁴, V. Maslov⁴, J. Mrazek⁸, C. Moore¹⁰, F. Nowacki¹¹, B.M. Nyakó², Yu.-E. Penionzhkevich⁴, M.G. Saint-Laurent³, F. Sarazin³, J.A. Scarpaci¹, G. Sletten¹², C. Stodel³, M. Taylor¹⁰, C. Theisen⁶ and G. Voltolini<sup>3

1</sup>  IPN, IN2P3-CNRS, Orsay, France
²  Institute of Nuclear Research, H-4001 Debrecen, Pf. 51, Hungary
³  GANIL, Caen, France
⁴  FLNR, JINR, Dubna, Russia
⁵  CSNSM, IN2P3-CNRS, Orsay, France
⁶  CEA-Saclay, Gif-sur-Yvette, France
⁷  IAP, Bucharest-Magurele, Romania
⁸  NPI, Rez, Czech Republic
⁹  IPN, Lyon, France
¹⁰  OLL, University of Liverpool, Liverpool, UK
¹¹  University L. Pasteur, Strasbourg, France
¹²  NBI, Copenhagen, Denmark

azaiez@ipno.in2p3.fr

(Received: 21 March 2002 / Published online: 31 October 2002)

Abstract
The structure of neutron-rich light nuclei around N=20 and 28 has been investigated at GANIL by means of in-beam gamma-spectroscopy using fragmentation reactions of ³⁶S and ⁴⁸Ca beams on a Be target. Gamma-decay of relatively high-lying excited states have been measured for the first time in nuclei around ³²Mg and ⁴⁴S. Level schemes are proposed and discussed for a large number of these neutron-rich nuclei around N=20 and N=28.

PACS
23.20.Lv - Gamma transitions and level energies.
23.20.En - Angular distribution and correlation measurements.
25.70.Mn - Projectile and target fragmentation.
27.30.+t - .

© Società Italiana di Fisica, Springer-Verlag 2002