| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:48 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Study of the neutron-rich isotopes 43S and 46Ar through intermediate energy Coulomb excitation (II)
Authors:
S. Calinescu (1,9), L. Cáceres (2), S. Grévy (3), D. Sohler (4), M. Stanoiu (1), F. Negoita (1), C. Borcea (1), R. Borcea (1), M. Bowry (5), W. Catford (5), Z. Dombradi(4), S. Franchoo (6), R. Gillibert (10), J.C. Thomas (2), I. Kuti (4), S. Lukyanov (7), A. Lepailleur (2) , J. Mrazek (8), M. Niikura (6), Z. Podolyak (5), C. Petrone (1,9), Y. Penionzhkevich (7), T. Roger (2) , F. Rotaru (1), O. Sorlin (2), I. Stefan (6), Z. Vajta (4), E. Wilson (5)
Affiliation:
(1)Horia Hulubei National Institute for Physics and Nuclear Engineering, P.O. Box MG-6, 077125 Bucharest-Magurele, Romania
(2)Grand Accélérateur National d’Ions Lours (GANIL), CEA/DSM-CNRS/IN2P3, Caen, France
(3) CENBG, CNRS/IN2P3, Université de Bordeaux 1, Gradignan, France
(4)Institute of Nuclear Research (ATOMKI), Debrecen, Hungary
(5)Department of physics, University of Surrey, Guildford GU2 7HX. U.K.
(6)IPN, Orsay, France
(7)FLNR, JINR, Dubna, Russia
(8)NPI, Rez, Czech Republic
(9)Faculty of Physics, University of Bucharest, Romania
(10) Université de Caen Basse Normandie, Caen, France
E-mail
stefana.calinescu@tandem.nipne.ro
Keywords:
erosion of the N=28 shell closure, exotic nuclei, coulomb excitation at intermediate energy, neutron-rich nuclei
Abstract:
The reduced transition probabilities B(E2:3/2-→7/2-2 ) and B(E2: 0+→2+1) have been measured in43S and 46Ar, respectively, using Coulomb excitation at intermediate energy. The nuclei of interest were produced by fragmentation of a 48Ca beam at GANIL. The reaction products were separated in the LISE spectrometer. After Coulomb excitation of 43S and 46Ar in a 208Pb target, the γ-rays emitted in-flight were detected by 64 BaF2 detectors of the Château de Cristal array. The preliminary values deduced for the reduced transition probabilities are in agreement with the predictions of the shell model calculations and indicate a prolate-spherical shape coexistence in the 43S nucleus. For 46Ar, a non-zero deformation was measured, the experimental results are in better agreement with Hartree-Fock calculations and suggest the persistence of the effects of the N=28 shell closure at Z=16.
|
|
|
|