CERN Accelerating science

Article
Report number	arXiv:1010.2613
Title	Coulomb excitation of 73Ga
Author(s)	Diriken, J. (Leuven U.) ; Stefanescu, I. (Leuven U. ; Maryland U., Dept. Chem.) ; Balabanski, D. (Camerino U. ; Sofiya, Inst. Nucl. Res.) ; Blasi, N. (Camerino U.) ; Blazhev, A. (Cologne U.) ; Bree, N. (Leuven U.) ; Cederkall, J. (CERN ; Lund U.) ; Cocolios, T.E. (Leuven U.) ; Davinson, T. (Edinburgh U.) ; Eberth, J. (Cologne U.) ; Ekstrom, A. (Lund U.) ; Fedorov, D.V. (St. Petersburg, INP) ; Fedosseev, V.N. (CERN) ; Fraile, L.M. (CERN ; Madrid U.) ; Franchoo, S. (Orsay, IPN) ; Georgiev, G. (Orsay) ; Gladnishki, K. (Sofiya U.) ; Huyse, M. (Leuven U.) ; Ivanov, O.V. (Leuven U.) ; Ivanov, V.S. (St. Petersburg, INP) ; Iwanicki, J. (Warsaw U.) ; Jolie, J. (Cologne U.) ; Konstantinopoulos, T. (Democritos Nucl. Res. Ctr.) ; Kroll, Th. (Munich, Tech. U.) ; Krucken, R. (Munich, Tech. U.) ; Koster, U. (CERN ; Laue-Langevin Inst.) ; Lagoyannis, A. (Democritos Nucl. Res. Ctr.) ; Lo Bianco, G. (Camerino U.) ; Maierbeck, P. (Munich, Tech. U.) ; Marsh, B.A. (CERN) ; Napiorkowski, P. (Warsaw U.) ; Patronis, N. (Leuven U.) ; Pauwels, D. (Leuven U.) ; Reiter, P. (Cologne U.) ; Seliverstov, M. (St. Petersburg, INP) ; Sletten, G. (Copenhagen U.) ; Van de Walle, J. (Leuven U. ; CERN ; Groningen, KVI) ; Van Duppen, P. (Leuven U.) ; Voulot, D. (CERN) ; Walters, W.B. (Maryland U., Dept. Chem.) ; Warr, N. (Cologne U.) ; Wenander, F. (CERN) ; Wrzosek, K. (Warsaw U.)
Publication	2010
Imprint	14 Oct 2010
Number of pages	7
In:	Phys. Rev. C 82 (2010) 064309
DOI	10.1103/PhysRevC.82.064309
Subject category	Nuclear Physics - Experiment
Accelerator/Facility, Experiment	CERN ISOLDE ; CERN REX ISOLDE
Abstract	The B(E2; Ii ! If ) values for transitions in 71Ga and 73Ga were deduced from a Coulomb excitation experiment at the safe energy of 2.95 MeV/nucleon using post-accelerated beams of 71,73Ga at the REX-ISOLDE on-line isotope mass separator facility. The emitted gamma rays were detected by the MINIBALL-detector array and B(E2; Ii->If ) values were obtained from the yields normalized to the known strength of the 2+ -> 0+ transition in the 120Sn target. The comparison of these new results with the data of less neutron-rich gallium isotopes shows a shift of the E2 collectivity towards lower excitation energy when adding neutrons beyond N = 40. This supports conclusions from previous studies of the gallium isotopes which indicated a structural change in this isotopical chain between N = 40 and N = 42. Combined with recent measurements from collinear laser spectroscopy showing a 1/2- spin and parity for the ground state, the extracted results revealed evidence for a 1/2-; 3/2- doublet near the ground state in 73 31Ga42 differing by at most 0.8 keV.

Corresponding record in: Inspire