Low-lying non-normal parity states in B-8 measured by proton elastic scattering on Be-7
| Data(s) |
2009
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| Resumo |
A new measurement of proton resonance scattering on Be-7 was performed tip to the center-of-mass energy of 6.7 MeV using the low-energy RI beam facility CRIB (CNS Radioactive Ion Beam separator) at the Center for Nuclear Study of the University of Tokyo. The excitation function of Be-7 + p elastic scattering above 3.5 MeV was measured Successfully for the first time, providing important information about the resonance structure of the B-8 nucleus. The resonances are related to the reaction rate of Be-7(p.gamma)B-8. which is the key reaction in solar B-8 neutrino production. Evidence for the presence of two negative parity states is presented. One of them is a 2(-) state observed as a broad s-wave resonance, the existence of which had been questionable. Its possible effects on the determination of the astrophysical S-factor of Be-7(p.gamma)B-8 at solar energy are discussed. The other state had not been observed in previous measurements, and its spin and parity were determined as 1(-). (C) 2009 Elsevier B.V. All rights reserved. Young Scientists 17740135 |
| Identificador | |
| Idioma(s) |
英语 |
| Fonte |
Yamaguchi, H (Yamaguchi, H.); Wakabayashi, Y (Wakabayashi, Y.); Kubono, S (Kubono, S.); Amadio, G (Amadio, G.); Fujikawa, H (Fujikawa, H.); Teranishi, T (Teranishi, T.); Saito, A (Saito, A.); He, JJ (He, J. J.); Nishimura, S (Nishimura, S.); Togano, Y (Togano, Y.); Kwon, YK (Kwon, Y. K.); Niikura, M (Niikura, M.); Iwasa, N (Iwasa, N.); Inafuku, K (Inafuku, K.); Khiem, LH (Khiem, L. H.) . Low-lying non-normal parity states in B-8 measured by proton elastic scattering on Be-7 ,PHYSICS LETTERS B ,2009,672(3 ):230-234 |
| Palavras-Chave | #RI beam #Proton resonance scattering #7 Be(p.gamma)B-8 #Solar neutrino |
| Tipo |
期刊论文 |
