Evidence of a Near-Threshold Resonance in B 11 Relevant to the β -Delayed Proton Emission of Be 11

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.

doi:10.1103/PhysRevLett.129.012501

Title: Evidence of a Near-Threshold Resonance in ${}^{11}B$ Relevant to the $β$ -Delayed Proton Emission of ${}^{11}{Be}$

Journal Article · Tue Jun 28 00:00:00 EDT 2022 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.129.012501· OSTI ID:1874089

; 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. more »

A narrow near-threshold proton-emitting resonance (E_x = 11.4 MeV, J^π = 1/2⁺, and Γ_p = 4.4 keV) was directly observed in ¹¹B via proton resonance scattering. This resonance was previously inferred in the β-delayed proton emission of the neutron halo nucleus ¹¹Be. 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 α(Γ_α = 11 keV) emission channels.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA); Spanish Ministerio de Economia y Competitividad (MINECO); European Regional Development Fund (ERDF); National Science Foundation (NSF)

Grant/Contract Number:: SC0020451; AC02-06CH11357; AC52-07NA27344; MDM-2016-0692; NA0003180; NA0000979; RYC2019-028438-I; PHY-2012040; PHY-1565546; PHY-1913554

OSTI ID:: 1874089

Alternate ID(s):: OSTI ID: 1909338

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Vol. 129 Journal Issue: 1; ISSN 0031-9007

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Evidence of a Near-Threshold Resonance in B 11 Relevant to the β -Delayed Proton Emission of Be 11

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Title: Evidence of a Near-Threshold Resonance in ${}^{11}B$ Relevant to the $β$ -Delayed Proton Emission of ${}^{11}{Be}$