Structure of the N = 50 As, Ge, Ga nuclei

E. Sahin A; G. De Angelis; G. Duchene; T. Faul; A. Gadea; A.F. Lisetskiy; D. Ackermann; A. Algora; S. Aydin; F. Azaiez; D. Bazzacco; G. Benzoni; M. Bostan; T. Byrski; I. Celikovic; R. Chapman; L. Corradi; S. Courtin; D. Curien; U. Datta Pramanik; F. Didierjean; O. Dorvaux; M.N. Erduran; S. Erturk; E. Farnea; E. Fioretto; G. De France; S. Franchoo; B. Gall; A. Gottardo; B. Guiot; F. Haas; F. Ibrahim; E. Ince; A. Khouaja; A. Kusoglu; G. La Rana U; M. Labichev; D. Lebhertz; S. Lenzi; S. Leoni; S. Lunardi; P. Masoni; D. Mengoni; C. Michelagnoli; V. Modamio; G. Montagnoli; D. Montanari; R. Morou; B. Mouginot; D.R. Napoli; D. O'Donnell; J.R.B. Oliveira; J. Ollier; R. Orlandi; G. Pollarolo; F. Recchia; J. Robin; M.-D. Salsac; F. Scarlassara; R.P. Singh; R. Silvestri; J.F. Smith; I. Stefan; A.M. Stefanini; K. Subotic; S. Szilner; D. Tonev; D.A. Torres; M. Trotta; P. Ujic; C. Ur; J.J. Valiente-Dobón; D. Verney; M. Yalcinkaya; P.T. Wady; K.T. Wiedemann; K. Zuber

HAL: in2p3-00735688, version 1

DOI: 10.1016/j.nuclphysa.2012.08.007

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Nuclear Physics A 893 (2012) 1-12

Structure of the N = 50 As, Ge, Ga nuclei

E. Sahin A, G. De Angelis, G. Duchene, T. Faul¹, A. Gadea, A.F. Lisetskiy, D. Ackermann, A. Algora, S. Aydin, F. Azaiez², D. Bazzacco, G. Benzoni, M. Bostan, T. Byrski, I. Celikovic, R. Chapman, L. Corradi, S. Courtin¹, D. Curien¹, U. Datta Pramanik, F. Didierjean, O. Dorvaux¹, M.N. Erduran, S. Erturk, E. Farnea, E. Fioretto, G. De France³, S. Franchoo², B. Gall, A. Gottardo, B. Guiot, F. Haas¹, F. Ibrahim², E. Ince, A. Khouaja¹, A. Kusoglu, G. La Rana U, M. Labichev, D. Lebhertz¹, S. Lenzi, S. Leoni, S. Lunardi, P. Masoni, D. Mengoni, C. Michelagnoli, V. Modamio, G. Montagnoli, D. Montanari, R. Morou, B. Mouginot, D.R. Napoli, D. O'Donnell, J.R.B. Oliveira, J. Ollier, R. Orlandi, G. Pollarolo, F. Recchia, J. Robin, M.-D. Salsac⁴, F. Scarlassara, R.P. Singh, R. Silvestri, J.F. Smith, I. Stefan², A.M. Stefanini, K. Subotic, S. Szilner, D. Tonev, D.A. Torres, M. Trotta, P. Ujic, C. Ur, J.J. Valiente-Dobón, D. Verney², M. Yalcinkaya, P.T. Wady, K.T. Wiedemann, K. Zuber

(2012)

The level structures of the N = 50 83As, 82Ge, and 81Ga isotones have been investigated by means of multi-nucleon transfer reactions. A first experiment was performed with the CLARA-PRISMA setup to identify these nuclei. A second experiment was carried out with the GASP array in order to deduce the γ -ray coincidence information. The results obtained on the high-spin states of such nuclei are used to test the stability of the N = 50 shell closure in the region of 78Ni (Z = 28). The comparison of the experimental level schemes with the shell-model calculations yields an N = 50 energy gap value of 4.7(3) MeV at Z = 28. This value, in a good agreement with the prediction of the finite-range liquid-drop model as well as with the recent large-scale shell model calculations, does not support a weakening of the N = 50 shell gap down to Z = 28.

1:	IPHC - Institut Pluridisciplinaire Hubert Curien

2:	IPNO - Institut de Physique Nucléaire d'Orsay

3:	GANIL - Grand Accélérateur National d'Ions Lourds

4:	SPhN - Service de Physique Nucléaire

Subject(s)

Physics/Nuclear Experiment


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Submitted on: Wednesday, 26 September 2012 15:07:25
Updated on: Thursday, 27 September 2012 11:09:57