Investigations of multi-particle exit channels of levels in light nuclei
Abstract
The HiRA array was used to study the many-particle exit channels produced from the interactions of an E / A = 70 MeV 9C beam with a 9Be target. Correlations between these particles were studied to analyze the decays, particularly whether they occur in one prompt step or sequentially through long-lived intermediates. The five-body decay of 8C is found to occur in two steps of two proton decay through a 6Be ground-state. In the first step, the correlations between the protons clearly show the enhanced diproton character of the decay, and the second step was found to be consistent with the independently measured 6Be two-proton decay. A new mass and uncertainty for 8C were deduced from these data and used in a refit of the A = 8 data to the isobaric multiplet mass equation (IMME). The fit indicates the need for terms beyond quadratic meaning that isospin symmetry is clearly broken for the A = 8 multiplet.
- Publication:
-
APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- October 2011
- Bibcode:
- 2011APS..DNP.EA084M