학술논문
Evidence of a near-threshold resonance in $^{11}$B relevant to the $\beta$-delayed proton emission of $^{11}$Be
Document Type
Working Paper
Author
Ayyad, Y.; Mittig, W.; Tang, T.; Olaizola, B.; Potel, G.; Rijal, N.; Watwood, N.; Alvarez-Pol, H.; Bazin, D.; Caamaño, M.; Chen, J.; Cortesi, M.; Fernández-Domínguez, B.; Giraud, S.; Gueye, P.; Heinitz, S.; Jain, R.; Kay, B. P.; Maugeri, E. A.; Monteagudo, B.; Ndayisabye, F.; Paneru, S. N.; Pereira, J.; Rubino, E.; Santamaria, C.; Schumann, D.; Surbrook, J.; Wagner, L.; Zamora, J. C.; Zelevinsky, V.
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Subject
Language
Abstract
A narrow near-threshold proton-emitting resonance (Ex = 11.4 MeV, J$^{\pi}$ = 1/2$^{+}$ and $\Gamma_{p}$ = 4.4 keV) was directly observed in $^{11}$B via proton resonance scattering. This resonance was previously inferred in the $\beta$-delayed proton emission of the neutron halo nucleus $^{11}$Be. The good agreement between both experimental results serves as a ground to confirm the existence of such exotic decay and the particular behavior of weakly bound nuclei coupled to the continuum. $R$-matrix analysis shows a sizable partial decay width for both, proton and $\alpha$ emission channels.