Direct observation of proton emission in 11Be

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

*Corresponding author for this work

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The elusive β-p+ decay was observed in 11Be 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 11B above the proton separation energy.
Original languageEnglish
Article number082501
Number of pages5
JournalPhysical Review Letters
Issue number8
Publication statusPublished - 22 Aug 2019
Externally publishedYes


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