关键天体反应<SUP>18</SUP>Ne(α, p)<SUP>21</SUP>Na的实验研究

张立勇; 许世伟; 何建军; H. Yamaguchi; S. Kubono; Y. Wakabayashi; 陈思泽; 胡钧; 马朋; Y. Togano; T. Hashimoto; D. Kahl; T. Teranishi; 陈若富; 王宏伟; 田文栋; 郭冰; S. Hayakawa; N. Iwasa0; T. Yamada0; T. Komatsubara

doi:10.11804/NuclPhysRev.30.04.385

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关键天体反应¹⁸Ne(α, p)²¹Na的实验研究

文章导航 > 原子核物理评论 > 2013 > 30(4): 385-390

张立勇, 许世伟, 何建军, H. Yamaguchi, S. Kubono, Y. Wakabayashi, 陈思泽, 胡钧, 马朋, Y. Togano, T. Hashimoto, D. Kahl, T. Teranishi, 陈若富, 王宏伟, 田文栋, 郭冰, S. Hayakawa, N. Iwasa0, T. Yamada0, T. Komatsubara. 关键天体反应18Ne(α, p)21Na的实验研究[J]. 原子核物理评论, 2013, 30(4): 385-390. doi: 10.11804/NuclPhysRev.30.04.385

引用本文:

张立勇, 许世伟, 何建军, H. Yamaguchi, S. Kubono, Y. Wakabayashi, 陈思泽, 胡钧, 马朋, Y. Togano, T. Hashimoto, D. Kahl, T. Teranishi, 陈若富, 王宏伟, 田文栋, 郭冰, S. Hayakawa, N. Iwasa0, T. Yamada0, T. Komatsubara. 关键天体反应¹⁸Ne(α, p)²¹Na的实验研究[J]. 原子核物理评论, 2013, 30(4): 385-390. doi: 10.11804/NuclPhysRev.30.04.385

ZHANG Liyong, XU Shiwei, HE Jianjun, H.Yamaguchi, S.Kubono, Y.Wakabayashi, CHEN Size, HU Jun, MA Peng, Y.Togano, T.Hashimoto, D.Kahl, T.Teranishi, CHEN Ruofu, WANG Hongwei, TIAN Wendong, GUO Bing, S.Hayakawa, N.Iwasa0, T.Yamada0, T.Komatsubara. Experimental Study of Key 18Ne(α, p)21Na Astrophysical Reaction[J]. Nuclear Physics Review, 2013, 30(4): 385-390. doi: 10.11804/NuclPhysRev.30.04.385

Citation:

ZHANG Liyong, XU Shiwei, HE Jianjun, H.Yamaguchi, S.Kubono, Y.Wakabayashi, CHEN Size, HU Jun, MA Peng, Y.Togano, T.Hashimoto, D.Kahl, T.Teranishi, CHEN Ruofu, WANG Hongwei, TIAN Wendong, GUO Bing, S.Hayakawa, N.Iwasa0, T.Yamada0, T.Komatsubara. Experimental Study of Key ¹⁸Ne(α, p)²¹Na Astrophysical Reaction[J]. Nuclear Physics Review, 2013, 30(4): 385-390. doi: 10.11804/NuclPhysRev.30.04.385

关键天体反应¹⁸Ne(α, p)²¹Na的实验研究

doi: 10.11804/NuclPhysRev.30.04.385

中国科学院近代物理研究所,甘肃兰州730000;
兰州大学核科学与技术学院,甘肃兰州730000;
中国科学院大学,北京100049;
Center for Nuclear Study (CNS), University of Tokyo, Hirosawa 3510198 Japan;
Advanced Science Research Center JAEA, Tokai Ibaraki 3191195 Japan;
RIKEN, Hirosawa Wako Saitama 3510198 Japan;
Department of Physics, University of Kyushu, Fukuoka 8128581 Japan;
中国科学院上海应用物理研究所,上海201800;
中国原子能科学研究院,北京102413;
Department of Physics, University of Tohoku, Sendai 9808577 Japan;
Department of Physics, University of Tsukuba, Tsukuba 3050006 Japan

Experimental Study of Key ¹⁸Ne(α, p)²¹Na Astrophysical Reaction

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;
University of Chinese Academy of Sciences, Beijing 100049, China;
Center for Nuclear Study (CNS), University of Tokyo, Hirosawa 3510198 Japan;
Advanced Science Research Center, JAEA, Takai Ibaraki 3191195 Japan;
RIKEN,2-1 Hirosawa, Wako, Saitama, 3510198 Japan;
Department of Physics, University of Kyushu, Fukuoka 8128581 Japan;
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;
China Institute of Atomic Energy, Beijing 102413, China;
Department of Physics, University of Tohoku, Sendai 9808577 Japan;

摘要: 在X 射线暴高温高密度的环境中，¹⁸Ne( α, p)²¹Na 很可能是由热CNO 循环突破到rp 过程的一个重要反应。到目前为止，人们测得的反应率还存在很大的不确定性。实验中用CRIB(CNS RadioactiveIon Beam separator) 提供的21Na 放射性束轰击8.8 mg/cm2 的聚乙烯厚靶，利用放置在θlab = 14°，0°，14° 处的3 套硅条探测器望远镜阵列对反冲轻粒子进行鉴别和测量，测得在一段能区(Ex = 5:5 9:2MeV) 内²¹Na(p, p)²¹Na 的激发函数。通过对²¹Na(p, p) 共振弹性散射截面进行R矩阵拟合，得到了22Mg共振能级的自旋宇称以及质子宽度等信息，从而为计算¹⁸Ne( α,, p)²¹Na 反应率提供了实验参数。The ¹⁸Ne(α ,p)²¹Na reaction is thought to be one of the key breakout reaction from the hot CNO cycle to the rp-process in X-ray bursts. Over stellartemperatures achieved in XRBs, this rate has not been sufficiently determined.The experiment was performed using CRIB (CNS Radioactive Ion Beam separator) at the Center for Nuclear Study (CNS) of the University of Tokyo. An 89 MeV ²¹Na radioactive ion beam was produced and bombarded an 8.8 mg/cm2 thick polyethylene target. The recoiled light particles were detected with three Micron silicon ΔE-E telescopes centered at angles of θlab = 0°; +14° and 14°with respect to the beam direction, respectively. The 21Na+p elastic-scattering excitation functions were reconstructed with a thick-target method over energies Ex = 5:5 9:2 MeV. The resonance parameters have been determined through an R-matrix analysis，which will be used to evaluate the ¹⁸Ne( α, p)²¹Na reaction rate.
- 核天体物理 /
- X射线暴 /
- 放射性束 /
- 厚靶方法 /
- 共振散射
Abstract: The ¹⁸Ne(α ,p)²¹Na reaction is thought to be one of the key breakout reaction from the hot CNO cycle to the rp-process in X-ray bursts. Over stellartemperatures achieved in XRBs, this rate has not been sufficiently determined.The experiment was performed using CRIB (CNS Radioactive Ion Beam separator) at the Center for Nuclear Study (CNS) of the University of Tokyo. An 89 MeV ²¹Na radioactive ion beam was produced and bombarded an 8.8 mg/cm2 thick polyethylene target. The recoiled light particles were detected with three Micron silicon ΔE-E telescopes centered at angles of θlab = 0°; +14° and 14°with respect to the beam direction, respectively. The 21Na+p elastic-scattering excitation functions were reconstructed with a thick-target method over energies Ex = 5:5 9:2 MeV. The resonance parameters have been determined through an R-matrix analysis，which will be used to evaluate the ¹⁸Ne( α, p)²¹Na reaction rate.
- nuclear astrophysics /
- X-ray burst /
- radioactive beam /
- thick target method /
- resonant scattering

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关键天体反应¹⁸Ne(α, p)²¹Na的实验研究

doi: 10.11804/NuclPhysRev.30.04.385

中国科学院近代物理研究所,甘肃兰州730000;

兰州大学核科学与技术学院,甘肃兰州730000;

中国科学院大学,北京100049;

Center for Nuclear Study (CNS), University of Tokyo, Hirosawa 3510198 Japan;

Advanced Science Research Center JAEA, Tokai Ibaraki 3191195 Japan;

RIKEN, Hirosawa Wako Saitama 3510198 Japan;

Department of Physics, University of Kyushu, Fukuoka 8128581 Japan;

中国科学院上海应用物理研究所,上海201800;

中国原子能科学研究院,北京102413;

Department of Physics, University of Tohoku, Sendai 9808577 Japan;

Department of Physics, University of Tsukuba, Tsukuba 3050006 Japan

收稿日期: 1900-01-01
修回日期: 1900-01-01
刊出日期: 2013-12-20

关键词:

X射线暴 /

摘要: 在X 射线暴高温高密度的环境中，¹⁸Ne( α, p)²¹Na 很可能是由热CNO 循环突破到rp 过程的一个重要反应。到目前为止，人们测得的反应率还存在很大的不确定性。实验中用CRIB(CNS RadioactiveIon Beam separator) 提供的21Na 放射性束轰击8.8 mg/cm2 的聚乙烯厚靶，利用放置在θlab = 14°，0°，14° 处的3 套硅条探测器望远镜阵列对反冲轻粒子进行鉴别和测量，测得在一段能区(Ex = 5:5 9:2MeV) 内²¹Na(p, p)²¹Na 的激发函数。通过对²¹Na(p, p) 共振弹性散射截面进行R矩阵拟合，得到了22Mg共振能级的自旋宇称以及质子宽度等信息，从而为计算¹⁸Ne( α,, p)²¹Na 反应率提供了实验参数。The ¹⁸Ne(α ,p)²¹Na reaction is thought to be one of the key breakout reaction from the hot CNO cycle to the rp-process in X-ray bursts. Over stellartemperatures achieved in XRBs, this rate has not been sufficiently determined.The experiment was performed using CRIB (CNS Radioactive Ion Beam separator) at the Center for Nuclear Study (CNS) of the University of Tokyo. An 89 MeV ²¹Na radioactive ion beam was produced and bombarded an 8.8 mg/cm2 thick polyethylene target. The recoiled light particles were detected with three Micron silicon ΔE-E telescopes centered at angles of θlab = 0°; +14° and 14°with respect to the beam direction, respectively. The 21Na+p elastic-scattering excitation functions were reconstructed with a thick-target method over energies Ex = 5:5 9:2 MeV. The resonance parameters have been determined through an R-matrix analysis，which will be used to evaluate the ¹⁸Ne( α, p)²¹Na reaction rate.

English Abstract

Experimental Study of Key ¹⁸Ne(α, p)²¹Na Astrophysical Reaction

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;

School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;

University of Chinese Academy of Sciences, Beijing 100049, China;

Center for Nuclear Study (CNS), University of Tokyo, Hirosawa 3510198 Japan;

Advanced Science Research Center, JAEA, Takai Ibaraki 3191195 Japan;

RIKEN,2-1 Hirosawa, Wako, Saitama, 3510198 Japan;

Department of Physics, University of Kyushu, Fukuoka 8128581 Japan;

Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;

China Institute of Atomic Energy, Beijing 102413, China;

Department of Physics, University of Tohoku, Sendai 9808577 Japan;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2013-12-20

Keywords:

Abstract: The ¹⁸Ne(α ,p)²¹Na reaction is thought to be one of the key breakout reaction from the hot CNO cycle to the rp-process in X-ray bursts. Over stellartemperatures achieved in XRBs, this rate has not been sufficiently determined.The experiment was performed using CRIB (CNS Radioactive Ion Beam separator) at the Center for Nuclear Study (CNS) of the University of Tokyo. An 89 MeV ²¹Na radioactive ion beam was produced and bombarded an 8.8 mg/cm2 thick polyethylene target. The recoiled light particles were detected with three Micron silicon ΔE-E telescopes centered at angles of θlab = 0°; +14° and 14°with respect to the beam direction, respectively. The 21Na+p elastic-scattering excitation functions were reconstructed with a thick-target method over energies Ex = 5:5 9:2 MeV. The resonance parameters have been determined through an R-matrix analysis，which will be used to evaluate the ¹⁸Ne( α, p)²¹Na reaction rate.

引用本文:

张立勇, 许世伟, 何建军, H. Yamaguchi, S. Kubono, Y. Wakabayashi, 陈思泽, 胡钧, 马朋, Y. Togano, T. Hashimoto, D. Kahl, T. Teranishi, 陈若富, 王宏伟, 田文栋, 郭冰, S. Hayakawa, N. Iwasa0, T. Yamada0, T. Komatsubara. 关键天体反应¹⁸Ne(α, p)²¹Na的实验研究[J]. 原子核物理评论, 2013, 30(4): 385-390. doi: 10.11804/NuclPhysRev.30.04.385

Citation:

ZHANG Liyong, XU Shiwei, HE Jianjun, H.Yamaguchi, S.Kubono, Y.Wakabayashi, CHEN Size, HU Jun, MA Peng, Y.Togano, T.Hashimoto, D.Kahl, T.Teranishi, CHEN Ruofu, WANG Hongwei, TIAN Wendong, GUO Bing, S.Hayakawa, N.Iwasa0, T.Yamada0, T.Komatsubara. Experimental Study of Key ¹⁸Ne(α, p)²¹Na Astrophysical Reaction[J]. Nuclear Physics Review, 2013, 30(4): 385-390. doi: 10.11804/NuclPhysRev.30.04.385