Direct observation of proton emission in 11Be

Abstract

The elusive ${\beta }^{-}{\text{p}}^{+}$ decay was observed in ${}^{11}$Be by directly measuring the emitted protons and their energy distribution for the first time with the prototype Active Target Time Projection Chamber (pAT-TPC) in an experiment performed at ISAC-TRIUMF. The measured ${\beta }^{-}{\text{p}}^{+}$ branching ratio is orders of magnitude larger than any previous theoretical model predicted. This can be explained by the presence of a narrow resonance in ${}^{11}$B above the proton separation energy.

References in corpus (12)

• Dark Matter Interpretation of the Neutron Decay Anomaly
• 11Be(beta-p), a quasi-free neutron decay?
• Dark Side of the Neutron?
• On the possibility to observe neutron dark decay in nuclei
• Rare $\beta$p decays in light nuclei
• Beta-delayed deuteron emission from 11Li: decay of the halo
• Beta delayed emission of a proton by a one-neutron halo nucleus
• Clarification of large-strength transitions in the beta decay of 11Be
• Analysis of Spectroscopic Factors in 11Be and 12Be in the Nilsson Strong Coupling Limit
• Automatic trajectory recognition in Active Target Time Projection Chambers data by means of hierarchical clustering
• The strength of beta-decays to the continuum
• Enhancement of parity violating mixing in halo nuclei and the problem of neutron weak parity nonconserving potential constant

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• Laboratory tests of the ordinary-mirror particle oscillations and the extended CKM matrix
• Observation of the near-threshold intruder $0^{-}$ resonance in ${}^{12}$Be
• 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
• The Thick Gas Electron Multiplier and its derivatives: physics, technologies and applications
• Neutron lifetime anomaly and mirror matter theory
• Tracking Algorithms for TPCs using Consensus-Based Robust Estimators
• How Macroscopic Limits on Neutron Star Baryon Loss Yield Microscopic Limits on Non-Standard-Model Baryon Decay
• ${\beta }^{-}\mathrm{p}$ and ${\beta }^{-}\alpha$ decay of the ${}^{11}$Be neutron halo ground state
• Single-particle properties of the near-threshold proton-emitting resonance in ${}^{11}$B
• The role of low-lying resonances for ${}^{10}$Be(p,$\alpha$) reaction rate and implications for the formation of the Solar System
• Impact of Nuclear Deformation of Parent and Daughter Nuclei on One Proton Radioactivity Lifetimes
• Shedding Light on Dark Sectors with Gravitational Waves
• New Physics Searches at Kaon and Hyperon Factories
• Weak decay of halo nuclei
• The Strange Physics of Dark Baryons