Investigation of structure in Al23 via resonant proton scattering of Mg22+p and the 22Mg(p,γ) Al23 astrophysical reaction rate

J. J. He, S. Kubono, T. Teranishi, M. Notani, H. Baba, S. Nishimura, J. Y. Moon, M. Nishimura, H. Iwasaki, Y. Yanagisawa, N. Hokoiwa, M. Kibe, J. H. Lee, S. Kato, Y. Gono, C. S. Lee

研究成果: ジャーナルへの寄稿記事

40 引用 (Scopus)

抄録

Proton resonant states in Al23 have been investigated for the first time by the resonant elastic and inelastic scattering of Mg22+p with a Mg22 beam at 4.38 MeV/nucleon bombarding a thick (CH2)n target. The low-energy Mg22 beam was separated by the CNS radioactive ion beam separator (CRIB). The energy spectra of recoiled protons were measured at average scattering angles of θlab 4°,17° and 23°. A new state has been observed at Ex=3.00 MeV with a spin-parity assignment of (3/2+). In addition, resonant inelastic scattering has populated three more states at excitation energies of 3.14, 3.26, and 3.95 MeV, with proton decay to the first excited state in Mg22 being observed. The new state at 3.95 MeV has been assigned a spin-parity of Jπ=(7/2+). The resonant parameters were determined by an R-matrix analysis of the excitation functions with a SAMMY-M6-BETA code. The core-excited structure of Al23 is discussed within a shell-model picture. The stellar reaction rate of the Mg22(p,γ)Al23 reaction has been reevaluated, and the revised total reaction rate is about 40% greater than the previous result for temperatures beyond T9=0.3.

元の言語英語
記事番号055802
ジャーナルPhysical Review C - Nuclear Physics
76
発行部数5
DOI
出版物ステータス出版済み - 11 5 2007

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proton scattering
astrophysics
reaction kinetics
protons
parity
inelastic scattering
excitation
separators
elastic scattering
energy spectra
ion beams
energy
decay
scattering
temperature

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

これを引用

Investigation of structure in Al23 via resonant proton scattering of Mg22+p and the 22Mg(p,γ) Al23 astrophysical reaction rate. / He, J. J.; Kubono, S.; Teranishi, T.; Notani, M.; Baba, H.; Nishimura, S.; Moon, J. Y.; Nishimura, M.; Iwasaki, H.; Yanagisawa, Y.; Hokoiwa, N.; Kibe, M.; Lee, J. H.; Kato, S.; Gono, Y.; Lee, C. S.

:: Physical Review C - Nuclear Physics, 巻 76, 番号 5, 055802, 05.11.2007.

研究成果: ジャーナルへの寄稿記事

He, JJ, Kubono, S, Teranishi, T, Notani, M, Baba, H, Nishimura, S, Moon, JY, Nishimura, M, Iwasaki, H, Yanagisawa, Y, Hokoiwa, N, Kibe, M, Lee, JH, Kato, S, Gono, Y & Lee, CS 2007, 'Investigation of structure in Al23 via resonant proton scattering of Mg22+p and the 22Mg(p,γ) Al23 astrophysical reaction rate', Physical Review C - Nuclear Physics, 巻. 76, 番号 5, 055802. https://doi.org/10.1103/PhysRevC.76.055802
He, J. J. ; Kubono, S. ; Teranishi, T. ; Notani, M. ; Baba, H. ; Nishimura, S. ; Moon, J. Y. ; Nishimura, M. ; Iwasaki, H. ; Yanagisawa, Y. ; Hokoiwa, N. ; Kibe, M. ; Lee, J. H. ; Kato, S. ; Gono, Y. ; Lee, C. S. / Investigation of structure in Al23 via resonant proton scattering of Mg22+p and the 22Mg(p,γ) Al23 astrophysical reaction rate. :: Physical Review C - Nuclear Physics. 2007 ; 巻 76, 番号 5.
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abstract = "Proton resonant states in Al23 have been investigated for the first time by the resonant elastic and inelastic scattering of Mg22+p with a Mg22 beam at 4.38 MeV/nucleon bombarding a thick (CH2)n target. The low-energy Mg22 beam was separated by the CNS radioactive ion beam separator (CRIB). The energy spectra of recoiled protons were measured at average scattering angles of θlab 4°,17° and 23°. A new state has been observed at Ex=3.00 MeV with a spin-parity assignment of (3/2+). In addition, resonant inelastic scattering has populated three more states at excitation energies of 3.14, 3.26, and 3.95 MeV, with proton decay to the first excited state in Mg22 being observed. The new state at 3.95 MeV has been assigned a spin-parity of Jπ=(7/2+). The resonant parameters were determined by an R-matrix analysis of the excitation functions with a SAMMY-M6-BETA code. The core-excited structure of Al23 is discussed within a shell-model picture. The stellar reaction rate of the Mg22(p,γ)Al23 reaction has been reevaluated, and the revised total reaction rate is about 40{\%} greater than the previous result for temperatures beyond T9=0.3.",
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AU - He, J. J.

AU - Kubono, S.

AU - Teranishi, T.

AU - Notani, M.

AU - Baba, H.

AU - Nishimura, S.

AU - Moon, J. Y.

AU - Nishimura, M.

AU - Iwasaki, H.

AU - Yanagisawa, Y.

AU - Hokoiwa, N.

AU - Kibe, M.

AU - Lee, J. H.

AU - Kato, S.

AU - Gono, Y.

AU - Lee, C. S.

PY - 2007/11/5

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N2 - Proton resonant states in Al23 have been investigated for the first time by the resonant elastic and inelastic scattering of Mg22+p with a Mg22 beam at 4.38 MeV/nucleon bombarding a thick (CH2)n target. The low-energy Mg22 beam was separated by the CNS radioactive ion beam separator (CRIB). The energy spectra of recoiled protons were measured at average scattering angles of θlab 4°,17° and 23°. A new state has been observed at Ex=3.00 MeV with a spin-parity assignment of (3/2+). In addition, resonant inelastic scattering has populated three more states at excitation energies of 3.14, 3.26, and 3.95 MeV, with proton decay to the first excited state in Mg22 being observed. The new state at 3.95 MeV has been assigned a spin-parity of Jπ=(7/2+). The resonant parameters were determined by an R-matrix analysis of the excitation functions with a SAMMY-M6-BETA code. The core-excited structure of Al23 is discussed within a shell-model picture. The stellar reaction rate of the Mg22(p,γ)Al23 reaction has been reevaluated, and the revised total reaction rate is about 40% greater than the previous result for temperatures beyond T9=0.3.

AB - Proton resonant states in Al23 have been investigated for the first time by the resonant elastic and inelastic scattering of Mg22+p with a Mg22 beam at 4.38 MeV/nucleon bombarding a thick (CH2)n target. The low-energy Mg22 beam was separated by the CNS radioactive ion beam separator (CRIB). The energy spectra of recoiled protons were measured at average scattering angles of θlab 4°,17° and 23°. A new state has been observed at Ex=3.00 MeV with a spin-parity assignment of (3/2+). In addition, resonant inelastic scattering has populated three more states at excitation energies of 3.14, 3.26, and 3.95 MeV, with proton decay to the first excited state in Mg22 being observed. The new state at 3.95 MeV has been assigned a spin-parity of Jπ=(7/2+). The resonant parameters were determined by an R-matrix analysis of the excitation functions with a SAMMY-M6-BETA code. The core-excited structure of Al23 is discussed within a shell-model picture. The stellar reaction rate of the Mg22(p,γ)Al23 reaction has been reevaluated, and the revised total reaction rate is about 40% greater than the previous result for temperatures beyond T9=0.3.

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