Experimental study of two-proton correlated emission from 29S excited states

被引：42
|
作者：
Lin, C. J. [1 ]
Xu, X. X. [1 ]
Jia, H. M. [1 ]
Yang, F. [1 ]
Jia, F. [1 ]
Zhang, S. T. [1 ]
Liu, Z. H. [1 ]
Zhang, H. Q. [1 ]
Xu, H. S. [2 ]
Sun, Z. Y. [2 ]
Wang, J. S. [2 ]
Hu, Z. G. [2 ]
Wang, M. [2 ]
Chen, R. F. [2 ]
Zhang, X. Y. [2 ]
Li, C. [2 ]
Lei, X. G. [2 ]
Xu, Z. G. [2 ]
Xiao, G. Q. [2 ]
Zhan, W. L. [2 ]
机构：
[1] China Inst Atom Energy, Beijing 102413, Peoples R China
[2] Chinese Acad Sci, Inst Modern Phys, Lanzhou 73000, Peoples R China
来源：
PHYSICAL REVIEW C | 2009年 / 80卷 / 01期
基金：
中国国家自然科学基金;
关键词：
PROTON; DECAY; HALO; RADIOACTIVITY; EXCITATION; ISOTOPES; NUCLEI;
D O I：
10.1103/PhysRevC.80.014310
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
An experiment of a S-29 beam bombarding a Au-197 target at an energy of 49.2 MeV/u has been performed to study the two-proton correlated emission from S-29 excited states. Complete-kinematics measurements were carried out in the experiment. The relative momentum, opening angle, and relative energy of two protons, as well as the invariant mass of the final system, were deduced by relativistic-kinematics reconstruction. The Si-27-p-p coincident events were picked out under strict conditions and the phenomenon of p-p correlations was observed among these events. The mechanisms of two-proton emission were analyzed in a simple schematic model, in which the extreme decay modes like He-2 cluster emission, three-body phase-space decay, and two-body sequential emission were taken into account. Associated with the Monte Carlo simulations, the present results show that two protons emitted from the excited states between 9.6 MeV and 10.4 MeV exhibit the features of He-2 cluster decay with a branching ratio of 29(-11)(+10)%.
引用
收藏
页数：8
相关论文
共 50 条
  • [31] The β-delayed one- and two-proton emission of 27S
    G. Canchel
    L. Achouri
    J. Äystö
    R. Béraud
    B. Blank
    E. Chabanat
    S. Czajkowski
    P. Dendooven
    A. Emsallem
    J. Giovinazzo
    J. Honkanen
    A. Jokinen
    M. Lewitowicz
    C. Longour
    F. de Oliviera Santos
    K. Peräjärvi
    M. Staniou
    J.C. Thomas
    The European Physical Journal A - Hadrons and Nuclei, 2001, 12 : 377 - 380
  • [32] Low-energy states in 11N and two-proton emission of 12O
    Angulo, C.
    Casarejos, E.
    Demaret, P.
    Gaelens, M.
    Leleux, P.
    Loiselet, M.
    Ninane, A.
    Ryckewaert, G.
    Vanderbist, F.
    Aliotta, M.
    Davinson, T.
    Liu, Z.
    Murphy, A. S.
    Roberts, I. A.
    Woods, P. J.
    Schweitzer, J. S.
    Barkert, F. C.
    Descouvemont, P.
    FRONTIERS IN NUCLEAR STRUCTURE ASTROPHYSICS, AND REACTIONS: FINUSTAR, 2006, 831 : 360 - +
  • [33] Two-proton decay from α-cluster states in 10C and 11N
    Charity, R. J.
    Sobotka, L. G.
    Webb, T. B.
    Brown, K. W.
    PHYSICAL REVIEW C, 2022, 105 (01)
  • [34] STUDY OF TWO-PROTON EMISSION HALF-LIVES USING RELATIVISTIC MEAN-FIELD MODEL
    Singh, Ajeet
    Shukla, A.
    Kumar, V.
    Gaidarov, M. K.
    ACTA PHYSICA POLONICA B, 2022, 53 (10):
  • [35] Experimental Study of Two-Alpha Emission from High-Lying Excited States of 17,18Ne
    徐新星
    林承键
    贾会明
    杨峰
    贾飞
    吴振东
    张世涛
    刘祖华
    张焕乔
    徐瑚珊
    孙志宇
    王建松
    胡正国
    王猛
    陈若富
    张雪荧
    李琛
    雷祥国
    徐治国
    肖国青
    Plasma Science and Technology, 2012, 14 (05) : 371 - 374
  • [36] Experimental Study of Two-Alpha Emission from High-Lying Excited States of 17,18Ne
    Xu Xinxing
    Lin Chengjian
    Jia Huiming
    Yang Feng
    Jia Fei
    Wu Zhendong
    Zhang Shitao
    Liu Zuhua
    Zhang Huanqiao
    Xu Hushan
    Sun Zhiyu
    Wang Jiansong
    Hu Zhengguo
    Wang Meng
    Chen Ruofu
    Zhang Xueying
    Li Chen
    Lei Xiangguo
    Xu Zhiguo
    Xiao Guoqing
    PLASMA SCIENCE & TECHNOLOGY, 2012, 14 (05) : 371 - 374
  • [37] Interplay between sequential and prompt two-proton decay from the first excited state of 16Ne
    Brown, K. W.
    Charity, R. J.
    Sobotka, L. G.
    Grigorenko, L. V.
    Golubkova, T. A.
    Bedoor, S.
    Buhro, W. W.
    Chajecki, Z.
    Elson, J. M.
    Lynch, W. G.
    Manfredi, J.
    McNeel, D. G.
    Reviol, W.
    Shane, R.
    Showalter, R. H.
    Tsang, M. B.
    Winkelbauer, J. R.
    Wuosmaa, A. H.
    PHYSICAL REVIEW C, 2015, 92 (03):
  • [38] Three-Body Faddeev Approach to Two-Proton Emissions from 18Ne Excited State
    Yu Ning
    Liu Fu-Qing
    Zhang Huan-Qiao
    CHINESE PHYSICS LETTERS, 2009, 26 (11)
  • [39] Reviewing the evidence for two-proton emission from the high-spin isomer in 94Ag
    Jenkins, David G.
    PHYSICAL REVIEW C, 2009, 80 (05):
  • [40] Two-proton removal from 44S and the structure of 42Si
    Tostevin, J. A.
    Brown, B. A.
    Simpson, E. C.
    PHYSICAL REVIEW C, 2013, 87 (02):
12345