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Title: Isotopic effects in sub-barrier fusion of Si + Si systems

Recent measurements of fusion cross sections for the 28Si + 28Si system revealed a rather unsystematic behavior; i.e., they drop faster near the barrier than at lower energies. This was tentatively attributed to the large oblate deformation of 28Si because coupled-channels (CC) calculations largely underestimate the 28Si + 28Si cross sections at low energies, unless a weak imaginary potential is applied, probably simulating the deformation. 30Si has no permanent deformation and its low-energy excitations are of a vibrational nature. Here, previous measurements of this system reached only 4 mb, which is not sufficient to obtain information on effects that should show up at lower energies.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [2] ;  [6] ;  [2] ;  [7] ;  [1] ;  [8] ;  [4] ;  [1] ;  [1] ;  [1] ;  [1] ;  [5] ;  [9] ;  [10]
  1. Univ. di Padova and INFN, Padova (Italy)
  2. INFN, Legnaro (Padova) (Italy)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Univ. de Strasbourg, Strasbourg Cedex (France)
  5. Ruder Boskovic Institute, Zagreb (Croatia)
  6. Univ. di Padova and INFN, Padova (Italy); Univ. of Aberdeen (United Kingdom)
  7. INFN, Legnaro (Padova) (Italy); Univ. di Ferrara, Ferrara (Italy)
  8. Polish Academy of Sciences, Cracow (Poland)
  9. Univ. di Padova and INFN, Padova (Italy); Univ. Politecnica de Catalunya, Terrassa (Barcelona) (Spain)
  10. Univ. di Padova and INFN, Padova (Italy); Beihang Univ., Beijing (China)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 97; Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
European Commission - Community Research and Development Information Service (CORDIS) - Seventh Framework Programme (FP7); Croatian Science Foundation; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1460996
Alternate Identifier(s):
OSTI ID: 1434350