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Unbound States in 17C Probed via Single-Neutron Removal from 18C at 245 MeV/u.
- Source :
- AIP Conference Proceedings; 2018, Vol. 1947, p1-6, 6p
- Publication Year :
- 2018
-
Abstract
- A study of unbound states in <superscript>17</superscript>C by means of one-neutron knockout from a fast moving <superscript>18</superscript>C beam at an energy of 245 MeV/nucleon on a carbon target was performed at the RIKEN-RIBF laboratory utilizing SAMURAI. The energy spectrum of unbound <superscript>17</superscript>C constructed from momentum vectors of the forward going beam velocity <superscript>16</superscript>C fragment and neutron covered an energy range of the decay neutron below about 6 MeV in the center of mass of <superscript>17</superscript>C*. The relative energy Erel spectrum was characterized by two resonances at about 1.92 and 3.24 MeV in E<subscript>rel</subscript> and a possible multiplet at around E<subscript>rel</subscript> ~ 0.7 MeV. Momentum distributions of the knockout residue for the E<subscript>rel</subscript>= 1.92 and 3.24-MeV states well matched to those of p-wave neutron removal, providing a model independent confirmation of negative parity assignments for these states. The proposed level scheme of <superscript>17</superscript>C was compared with a range of different shell-model predictions; it turned out that the YSOX shell-model interaction, employing the monopole-based universal interaction for the cross-shell two-body matrix elements and incorporating larger ?! excitations, gave a consistent account of it, including the locations of the 1=2<subscript>1</subscript><superscript>-</superscript> and 3=2<subscript>1</subscript><superscript>-</superscript> cross-shell states. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0094243X
- Volume :
- 1947
- Database :
- Complementary Index
- Journal :
- AIP Conference Proceedings
- Publication Type :
- Conference
- Accession number :
- 129321355
- Full Text :
- https://doi.org/10.1063/1.5030810