摘要
^(14)O(α, p)^(17)F是天体X射线暴中重要的突破反应。本工作通过厚靶方法测量其逆反应~1H(^(17)F,α)^(14)O的反应截面来研究这一关键反应。本实验工作是在日本东京大学原子核科学研究中心(CNS)的低能次级束流线(CRIB)上完成的,后续的扣除本底实验是在兰州放射性束流线(RIBLL1)上完成的。CRIB实验是通过~2H(^(16)O,n)^(17)F转移反应产生^(17)F次级束,经过CRIB分离提纯之后,利用该次级束轰击氢气靶。在氢气靶后布置了三套望远镜探测器系统,用以探测不同实验角度的反冲α粒子,在数据处理的过程中经过动力学重构后得到了~1H(^(17)F,α)^(14)O反应在质心系能区E_(c.m.)=2.7～3.4 MeV的反应截面。实验结果在3 MeV以上的高能区与前人的薄靶实验数据是一致的,在低能区本工作获得了新的实验数据,倾向于支持干涉相消的理论预言结果。
The 14O(α, p)17F reaction is one of the important breakout reactions in type I X-ray burst. This work reported a new cross section measurement of its reverse reaction of 1H(17F,α)14O. The experiment was performed using the CNS radioactive ion beam separator(CRIB), located at the Center for Nuclear Study(CNS),the University of Tokyo. The sequent background measurement was carried out at Radioactive Beam Line in Lanzhou(RIBLL1).17F beam was produced via the transfer reaction of 2H(16O, n)17F, subsequently separated and purified by CRIB and bombarded a thick hydrogen H2 gas target. The recoiling α particles were measured by three △E-E silicon telescopes at three different angles. The total cross sections of 1H(17F,α)14O have been derived at Ec.m.=2.7~3.4 MeV based on an isotropic angular distribution assumption. Our results are consistent with the previous ones in the energy region of Ec.m.>3 MeV, and we also obtained some new data in the low energy region,which partly support the destructive interference between the direct and resonant reaction mechanism predicted by the theory.
作者
贾宝路
胡钧
何建军
许世伟
H.Yamaguchi
D.Kahl
马朋
苏俊
王宏伟
T.Nakao
Y.Wakabayashi
T.Teranishi
K.I.Hahn
J.Y.Moon
H.S.Jung
T.Hashimoto
A.A.Chen
D.Irvine
C.S.Lee
S.Kubono
JIA Baolu;HU Jun;HE Jianjun;XU Shiwei;H. Yamaguchi;D. Kahl;MA Peng;SU Jun;WANG Hongwei;T. Nakao;Y. Wakabayashi;T. Teranishi;K. I. Hahn;J. Y. Moon;H. S. Jung;T. Hashimoto;A. A. Chen;D. Irvine;C. S. Lee;S. Kubono(Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 China;Department of Physics, Chung-Ang University, Seoul 156-756, Republic of Korea;RCNP, Osaka University, 10-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan;Department of Physics & Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada;School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China;National Astronomical Observatories Beijing 100101 China;Center for Nuclear Study (CNS), University of Tokyo, Hirosawa 3510198 Japan;China Institute of Atomic Energy (CIAE), P. O. Box 275(46), Beijing 102413, China;Shanghai Institute of Applied Physics (SINAP), Chinese Academy of Sciences, Shanghai 201800, China;RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;Department of Physics, Kyushu University, 6-10-1 Hakozaki, Fukuoka 812-8581, Japan;Department of Science Education, Ewha Womans University, Seoul 120-750, Republic of Korea)
出处
《原子核物理评论》
CAS
CSCD
北大核心
2019年第1期37-42,共6页
Nuclear Physics Review
基金
国家重点研发计划项目(2016YFA0400503)~~
关键词
X射线暴
厚靶方法
放射性核束
反应截面
激发函数
X-ray burst
thick-target method
radioactive beam
reaction cross section
excitation function
