Abstract
Excited states in C were populated via the Be(N,C+)X one-proton knockout reaction. The lifetime of the 2 state in C was measured using the recoil distance method. The extracted lifetime of ps yields a deduced value in good agreement with a previous measurement. The one-proton knockout cross section is used to extract the proton amplitude of the C 2 state, which confirms the neutron dominant character of this state. Gamma-ray branching ratios between the 2 state and the 2 and ground states were also determined. The results are compared with shell model and no-core shell model (with and ) calculations. The inclusion of three-body forces are essential in order for the no-core shell model calculations to reproduce the experimental findings on the -ray branching ratios.
- Received 26 July 2012
DOI:https://doi.org/10.1103/PhysRevC.86.044329
©2012 American Physical Society