Low-lying non-normal parity states in 8B measured by proton elastic scattering on 7Be

H. Yamaguchi, Y. Wakabayashi, S. Kubono, G. Amadio, H. Fujikawa, T. Teranishi, A. Saito, J. J. He, S. Nishimura, Y. Togano, Y. K. Kwon, M. Niikura, N. Iwasa, K. Inafuku, L. H. Khiem

研究成果: ジャーナルへの寄稿記事

32 引用 (Scopus)

抄録

A new measurement of proton resonance scattering on 7Be was performed up 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 7Be + p elastic scattering above 3.5 MeV was measured successfully for the first time, providing important information about the resonance structure of the 8B nucleus. The resonances are related to the reaction rate of 7Be(p, γ)8B, which is the key reaction in solar 8B 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 7Be(p, γ)8B at solar energy are discussed. The other state had not been observed in previous measurements, and its spin and parity were determined as 1-.

元の言語英語
ページ(範囲)230-234
ページ数5
ジャーナルPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
672
発行部数3
DOI
出版物ステータス出版済み - 2 23 2009

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proton scattering
parity
elastic scattering
proton resonance
resonance scattering
solar energy
separators
center of mass
astrophysics
reaction kinetics
neutrinos
ion beams
nuclei
energy
excitation

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

これを引用

Low-lying non-normal parity states in 8B measured by proton elastic scattering on 7Be. / Yamaguchi, H.; Wakabayashi, Y.; Kubono, S.; Amadio, G.; Fujikawa, H.; Teranishi, T.; Saito, A.; He, J. J.; Nishimura, S.; Togano, Y.; Kwon, Y. K.; Niikura, M.; Iwasa, N.; Inafuku, K.; Khiem, L. H.

:: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 巻 672, 番号 3, 23.02.2009, p. 230-234.

研究成果: ジャーナルへの寄稿記事

Yamaguchi, H, Wakabayashi, Y, Kubono, S, Amadio, G, Fujikawa, H, Teranishi, T, Saito, A, He, JJ, Nishimura, S, Togano, Y, Kwon, YK, Niikura, M, Iwasa, N, Inafuku, K & Khiem, LH 2009, 'Low-lying non-normal parity states in 8B measured by proton elastic scattering on 7Be', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 巻. 672, 番号 3, pp. 230-234. https://doi.org/10.1016/j.physletb.2009.01.033
Yamaguchi, H. ; Wakabayashi, Y. ; Kubono, S. ; Amadio, G. ; Fujikawa, H. ; Teranishi, T. ; Saito, A. ; He, J. J. ; Nishimura, S. ; Togano, Y. ; Kwon, Y. K. ; Niikura, M. ; Iwasa, N. ; Inafuku, K. ; Khiem, L. H. / Low-lying non-normal parity states in 8B measured by proton elastic scattering on 7Be. :: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2009 ; 巻 672, 番号 3. pp. 230-234.
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abstract = "A new measurement of proton resonance scattering on 7Be was performed up 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 7Be + p elastic scattering above 3.5 MeV was measured successfully for the first time, providing important information about the resonance structure of the 8B nucleus. The resonances are related to the reaction rate of 7Be(p, γ)8B, which is the key reaction in solar 8B 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 7Be(p, γ)8B at solar energy are discussed. The other state had not been observed in previous measurements, and its spin and parity were determined as 1-.",
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AU - Yamaguchi, H.

AU - Wakabayashi, Y.

AU - Kubono, S.

AU - Amadio, G.

AU - Fujikawa, H.

AU - Teranishi, T.

AU - Saito, A.

AU - He, J. J.

AU - Nishimura, S.

AU - Togano, Y.

AU - Kwon, Y. K.

AU - Niikura, M.

AU - Iwasa, N.

AU - Inafuku, K.

AU - Khiem, L. H.

PY - 2009/2/23

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AB - A new measurement of proton resonance scattering on 7Be was performed up 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 7Be + p elastic scattering above 3.5 MeV was measured successfully for the first time, providing important information about the resonance structure of the 8B nucleus. The resonances are related to the reaction rate of 7Be(p, γ)8B, which is the key reaction in solar 8B 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 7Be(p, γ)8B at solar energy are discussed. The other state had not been observed in previous measurements, and its spin and parity were determined as 1-.

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