Search for beta-delayed proton emission from ${}^{11}$Be

Abstract

We report on an attempt to reproduce the observation of ${\beta }^{-}$-delayed proton emission from ${}^{11}$Be through detection of the final state nucleus ${}^{10}$Be with accelerator mass spectrometry. Twelve samples were collected at the ISOLDE facility at CERN at different separator settings, allowing tests of different sources of contamination to be carried out. The observed amounts of ${}^{10}$Be per collected ${}^{11}$Be rule out several contamination sources, but do not agree internally. Formation of BeH molecular ions in the ion source may explain our data, in which case an upper limit of the $\beta$p branching ratio of $2.2\cdot 10^{-6}$ can be derived.

8 pages, 4 figures

References in corpus (8)

• Radioactive decays at limits of nuclear stability
• Dark Matter Interpretation of the Neutron Decay Anomaly
• 11Be(beta-p), a quasi-free neutron decay?
• Direct observation of proton emission in 11Be
• On the possibility to observe neutron dark decay in nuclei
• Rare $\beta$p decays in light nuclei
• Beta delayed emission of a proton by a one-neutron halo nucleus
• Clarification of large-strength transitions in the beta decay of 11Be

Cited by in corpus (10)

• Neutron Stars with Baryon Number Violation, Probing Dark Sectors
• Neutron's Dark Secret
• Assessment of the beta-delayed proton decay rate of ${}^{11}$Be
• Neutron Dark Decay
• $\beta$-delayed proton emission from ${}^{11}$Be in effective field theory
• Neutron lifetime anomaly and mirror matter theory
• ${\beta }^{-}\mathrm{p}$ and ${\beta }^{-}\alpha$ decay of the ${}^{11}$Be neutron halo ground state
• Search for a neutron dark decay in ${}^6$He
• Single-particle properties of the near-threshold proton-emitting resonance in ${}^{11}$B
• Weak decay of halo nuclei