Neutron-$\gamma$ competition for β-delayed neutron emission

Mumpower, Matthew Ryan; Kawano, Toshihiko; Moller, Peter

doi:10.1103/PhysRevC.94.064317

Title: Neutron-$$\gamma$$ competition for β-delayed neutron emission

Journal Article · Mon Dec 19 00:00:00 EST 2016 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.94.064317· OSTI ID:1345932

^[1]; Kawano, Toshihiko ^[1];

^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Here we present a coupled quasiparticle 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-γ competition can lead to both increases and decreases in neutron emission probabilities, depending on the system considered. Finally, a second consequence of this formalism is a prediction of more neutrons on average being emitted after β decay for nuclei near the neutron drip line compared to models that do not consider the statistical decay.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC). Nuclear Physics (NP) (SC-26); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1345932

Alternate ID(s):: OSTI ID: 1336861

Report Number(s):: LA-UR-16-25845; TRN: US1701119

Journal Information:: Physical Review C, Vol. 94, Issue 6; ISSN 2469-9985

Publisher:: APSCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 45 works

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