关于^(12)C+^(16)O反应的三体出射道的研究  

About Three-Body Exit Channel in the Reaction ^(12)C+^(16)O at E_L(^(16)O)=56MeV

作　　者：孔祥儆 李盘林[1] J.J.Kolata J.Vega K.A.Kryger F.W.Prosser P.A.Deyoung 

机构地区：[1]中国科学院上海原子核研究所 [2]Department of Physics,University of Notre Dame,Notre Dame In46556 U.S.A. [3]University of Kansas,Lawrence KS66045 U.S.A. [4]Hope College,Holland MI49423 U.S.A.

出　　处：《高能物理与核物理》1991年第8期748-753,共6页High Energy Physics and Nuclear Physics

摘　　要：我们用两个带电粒子符合方法研究了能量为56MeV的^(16)O轰击^(12)C的三体反应出射道,分别得到了两个不同的三体出射道:α_1+α_2+^(20)Ne和p+α+^(23)Na的反应Q值谱,两道之间的比为8:1,同时得到了α_1+α_2两维符合事件的投影谱,结果显示α+^(24)Mg是α_1+α_2+^(20)Ne出射道的主要中间过程。理论分析告诉我们,两体的两步连续衰变与剥裂机制的统计计算相加,满意地和实验能谱符合,但是,从运动学计算来说,~8Be_(1st)+^(20)Ne~*,然后~8Be_(1st)→α_1+α_2的连续衰变机制也是不能完全排除的。Three-body exit channel in the reaction ^(12)C+^(16)O at 56 MeV has been studied by using measurement of the coincidence between the two changed particles. The projected spectra of the coinsidence between the two α-particles shows that the channel α+^(24)Mg is the main intermediate process of three-body exit channel α_1+α_2+ ^(20)Ne in the reaction ^(12)C+^(16)O at 56MeV. The analysis of theoretical calculation showed that the sum of sequential decay and statistical break-up fit the experimental spectra satisfactorily.

关 键 词：^12C ^16O 三体反应 出射道 

分 类 号：O571.4[理学—粒子物理与原子核物理]