| Issue |
EPL
Volume 130, Number 1, April 2020
|
|
|---|---|---|
| Article Number | 12001 | |
| Number of page(s) | 6 | |
| Section | Nuclear Physics | |
| DOI | https://doi.org/10.1209/0295-5075/130/12001 | |
| Published online | 13 May 2020 | |
Assessment of the beta-delayed proton decay rate of 11Be
Department of Physics, Florida State University - Tallahassee, FL 32306, USA and Cyclotron Institute, Texas A&M University - College Station, TX 77843, USA
Received: 24 February 2020
Accepted: 24 April 2020
The 11Be neutron halo nucleus appears to decay into 10Be with a rate that exceeds expectations. Neutron disappearance into dark matter, beta decay of a halo neutron, or beta-delayed proton decay have been offered as explanations. In this work we study the latter option; we carry out shell model calculations and sequential decay analysis examining the beta-delayed proton decay going through a resonance in 11B. The narrow energy window, lack of states with sufficient spectroscopic strength, overwhelming alpha decay branch, all make reconciling the observed rate with beta-delayed proton decay difficult.
PACS: 21.10.Tg – Lifetimes, widths / 23.50.+z – Decay by proton emission / 21.60.Cs – Shell model
© EPLA, 2020
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