Spectroscopy of 39,41Si and the border of the N=28 island of inversion

D. Sohler, S. Grévy, Z. Dombrádi, O. Sorlin, L. Gaudefroy, B. Bastin, N. L. Achouri, J. C. Angélique, F. Azaiez, D. Baiborodin, R. Borcea, C. Bourgeois, A. Buta, A. Burger, L. Caceres, R. Chapman, J. C. Dalouzy, Z. Dlouhy, A. Drouard, Z. ElekesS. Franchoo, S. Iacob, I. Kuti, B. Laurent, M. Lazar, X. Liang, E. Liénard, S. M. Lukyanov, J. Mrazek, L. Nalpas, F. Negoita, F. Nowacki, N. A. Orr, Y. Penionzkhevitch, Z. Podolyák, F. Pougheon, A. Poves, P. Roussel-Chomaz, M. Stanoiu, I. Stefan, M. G. St-Laurent

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The structure of the very neutron-rich nuclei 39Si and 41Si has been investigated via in-beam γ-ray spectroscopy and few-nucleon knockout from radioactive beams. The observation of low-lying states in 39Si is a clear evidence for a drastic lowering of the intruder neutron 3/2- state when going from Z=20 to Z=14. The energy of the only γ-ray transition (672(14) keV) observed in 41Si is significantly lower than that of the first excited state in 47Ca (2014 keV) suggesting a deformed ground state for 41Si. These results are consistent with large-scale shell-model calculations implying that strong proton-neutron correlations are the main reason for the lowering of the intruder configurations over the normal ones.

Original languageEnglish
Pages (from-to)417-421
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume703
Issue number4
DOIs
Publication statusPublished - Sep 20 2011

Keywords

  • Knockout reactions
  • Neutron-rich Si nuclei
  • Nuclear structure
  • Shell closures

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'Spectroscopy of <sup>39,41</sup>Si and the border of the N=28 island of inversion'. Together they form a unique fingerprint.

  • Cite this

    Sohler, D., Grévy, S., Dombrádi, Z., Sorlin, O., Gaudefroy, L., Bastin, B., Achouri, N. L., Angélique, J. C., Azaiez, F., Baiborodin, D., Borcea, R., Bourgeois, C., Buta, A., Burger, A., Caceres, L., Chapman, R., Dalouzy, J. C., Dlouhy, Z., Drouard, A., ... St-Laurent, M. G. (2011). Spectroscopy of 39,41Si and the border of the N=28 island of inversion. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 703(4), 417-421. https://doi.org/10.1016/j.physletb.2011.08.004