Volume 130, Number 1, April 2020
|Number of page(s)||6|
|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
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.