Direct Observation of Proton Emission in Be 11

Y. Ayyad, B. Olaizola, W. Mittig, G. Potel, V. Zelevinsky, M. Horoi, S. Beceiro-Novo, M. Alcorta, C. Andreoiu, T. Ahn, M. Anholm, L. Atar, A. Babu, D. Bazin, N. Bernier, S. S. Bhattacharjee, M. Bowry, R. Caballero-Folch, M. Cortesi, C. DalitzE. Dunling, A. B. Garnsworthy, M. Holl, B. Kootte, K. G. Leach, J. S. Randhawa, Y. Saito, C. Santamaria, P. Šiurytė, C. E. Svensson, R. Umashankar, N. Watwood, D. Yates

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23 Scopus citations


The elusive β-p+ decay was observed in Be11 by directly measuring the emitted protons and their energy distribution for the first time with the prototype Active Target Time Projection Chamber in an experiment performed at ISAC-TRIUMF. The measured β-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 B11 above the proton separation energy.

Original languageEnglish
Article number082501
JournalPhysical Review Letters
Issue number8
StatePublished - Aug 22 2019


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