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

  • E. Sahin
  • , 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, 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. -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-Dobon, D. Verney, M. Yalcinkaya, P. T. Wady, K. T. Wiedemann, K. Zuber

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalNuclear Physics A
Volume893
DOIs
Publication statusPublished - 2012

Keywords

  • Nuclear reactions
  • Measured
  • Reaction fragments
  • PRISMA magnetic spectrometer
  • Ge Compton-suppreses detectros of CLARA array

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