Structure of neutron-rich nuclei around N=20, 28 and 40 from in-beam gamma-spectroscopy

Authors
Citation
F. Azaiez, Structure of neutron-rich nuclei around N=20, 28 and 40 from in-beam gamma-spectroscopy, APH NS-HEAV, 12(2-4), 2000, pp. 241-254
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA HUNGARICA NEW SERIES-HEAVY ION PHYSICS
ISSN journal
1219-7580 → ACNP
Volume
12
Issue
2-4
Year of publication
2000
Pages
241 - 254
Database
ISI
SICI code
1219-7580(2000)12:2-4<241:SONNAN>2.0.ZU;2-H
Abstract
The structure of neutron-rich light nuclei around N = 20, 28 and 40 has bee n investigated at GANIL by means of in-beam gamma spectroscopy using both s table and radioactive beams. The neutron-rich Ni-66,Ni-68 have been produce d from the fragmentation of a primary Zn-70 beam with a Ni target. Their re duced transition probabilities B(E2) from the 0(+) ground state to the firs t 2(+) state have been extracted from Coulomb excitation cross-section meas urement. Some of the obtained results related to the effectiveness of the N = 40 spherical sub-shell closure are discussed. In-beam gamma -spectroscop y using fragmentation reactions of S-36 and Ca-48 beams on a Be target have been recently performed. Gamma-decay of relatively high-lying excited stat es has been measured for the first time in nuclei around Mg-32 and S-44. Le vel schemes are proposed and discussed for a large number of these neutron- rich nuclei around N = 20 and N = 28.