2016/08/05 by Matthew Mumpower, Toshihiko Kawano, Peter Moller · 1 citation
Physics and Astronomy · #nucl-th
paper · pdf · doi:10.1103/physrevc.94.064317
9 pages, 6 figures, submitted
arxiv created 2016/08/05 · arxiv updated 2017/01/04
We present a coupled Quasi-particle Random Phase Approximation and Hauser-Feshbach (QRPA+HF) model for calculating delayed particle emission. This approach uses microscopic nuclear structure information which starts with Gamow-Teller strength distributions in the daughter nucleus, and then follows the statistical decay until the initial available excitation energy is exhausted. Explicitly included at each particle emission stage is γ-ray competition. We explore this model in the context of neutron emission of neutron-rich nuclei and find that neutron-gamma competition can lead to both increases and decreases in neutron emission probabilities, depending on the system considered. A second consequence of this formalism is a prediction of more neutrons on average being emitted after β-decay for nuclei near the neutron dripline compared to models that do not consider the statistical decay.