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.

Structure of the N=50 As, Ge, Ga nuclei / E. Sahin, G..D. 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..D. Pramanik, F. Didierjean, O. Dorvaux, M.N. Erduran, S. Erturk, E. Farnea, E. Fioretto, G..D. France, S. Franchoo, B. Gall, A. Gottardo, B. Guiot, F. Haas, F. Ibrahim, E. Ince, A. Khouaja, A. Kusoglu, G..L. Rana, M. Labiche, D. Lebhertz, S. Lenzi, S. Leoni, S. Lunardi, P. Mason, D. Mengoni, C. Michelagnoli, V. Modamio, G. Montagnoli, D. Montanari, R. Moro, B. Mouginot, D.R. Napoli, D. O’Donnell, J.R.B. Oliveira, J. Ollier, R. Orlandi, G. Pollarolo, F. Recchia, J. Robin, M.-. Salsac, F. Scarlassara, R.P. Singh, R. Silvestri, J.F. Smith, I. Stefan, A.M. Stefanini, K. Subotic, S. Szilner, D. Toneva, 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. - In: NUCLEAR PHYSICS. A. - ISSN 0375-9474. - 893(2012 Nov 02), pp. 1-12.

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

S. Leoni;
2012

Abstract

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.
English
Calculated; Deduced; Measured; Nuclear reactions
Settore FIS/04 - Fisica Nucleare e Subnucleare
Articolo
Esperti anonimi
Pubblicazione scientifica
2-nov-2012
Elsevier
893
1
12
12
Pubblicato
Periodico con rilevanza internazionale
Aderisco
info:eu-repo/semantics/article
Structure of the N=50 As, Ge, Ga nuclei / E. Sahin, G..D. 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..D. Pramanik, F. Didierjean, O. Dorvaux, M.N. Erduran, S. Erturk, E. Farnea, E. Fioretto, G..D. France, S. Franchoo, B. Gall, A. Gottardo, B. Guiot, F. Haas, F. Ibrahim, E. Ince, A. Khouaja, A. Kusoglu, G..L. Rana, M. Labiche, D. Lebhertz, S. Lenzi, S. Leoni, S. Lunardi, P. Mason, D. Mengoni, C. Michelagnoli, V. Modamio, G. Montagnoli, D. Montanari, R. Moro, B. Mouginot, D.R. Napoli, D. O’Donnell, J.R.B. Oliveira, J. Ollier, R. Orlandi, G. Pollarolo, F. Recchia, J. Robin, M.-. Salsac, F. Scarlassara, R.P. Singh, R. Silvestri, J.F. Smith, I. Stefan, A.M. Stefanini, K. Subotic, S. Szilner, D. Toneva, 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. - In: NUCLEAR PHYSICS. A. - ISSN 0375-9474. - 893(2012 Nov 02), pp. 1-12.
none
Prodotti della ricerca::01 - Articolo su periodico
78
262
Article (author)
si
E. Sahin, G..D. 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..D. Pramanik, F. Didierjean, O. Dorvaux, M.N. Erduran, S. Erturk, E. Farnea, E. Fioretto, G..D. France, S. Franchoo, B. Gall, A. Gottardo, B. Guiot, F. Haas, F. Ibrahim, E. Ince, A. Khouaja, A. Kusoglu, G..L. Rana, M. Labiche, D. Lebhertz, S. Lenzi, S. Leoni, S. Lunardi, P. Mason, D. Mengoni, C. Michelagnoli, V. Modamio, G. Montagnoli, D. Montanari, R. Moro, B. Mouginot, D.R. Napoli, D. O’Donnell, J.R.B. Oliveira, J. Ollier, R. Orlandi, G. Pollarolo, F. Recchia, J. Robin, M.-. Salsac, F. Scarlassara, R.P. Singh, R. Silvestri, J.F. Smith, I. Stefan, A.M. Stefanini, K. Subotic, S. Szilner, D. Toneva, 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
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