학술논문
Direct observation of proton emission in 11Be
Document Type
Working Paper
Author
Ayyad, Y.; Olaizola, B.; Mittig, W.; Potel, G.; Zelevinsky, V.; Horoi, M.; Beceiro-Novo, S.; Alcorta, M.; Andreoiu, C.; Ahn, T.; Anholm, M.; Atar, L.; Babu, A.; Bazin, D.; Bernier, N.; Bhattacharjee, S. S.; Bowry, M.; Caballero-Folch, R.; Cortesi, M.; Dalitz, C.; Dunling, E.; Garnsworthy, A. B.; Holl, M.; Kootte, B.; Leach, K. G.; Randhawa, J. S.; Saito, Y.; Santamaria, C.; Šiuryte, P.; Svensson, C. E.; Umashankar, R.; Watwood, N.; Yates, D.
Source
Phys. Rev. Lett. 123, 082501 (2019)
Subject
Language
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.