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关于12C+16O反应的三体出射道的研究

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

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【作者】 孔祥儆; 李盘林; J.J.Kolata; J.Vega; K.A.Kryger; F.W.Prosser; P.A.Deyoung;

【Author】 KONG XIANGJING LI PANLIN (Institute of Nuclear Research, Academia Sinica, Shanghai 201800) J. J. KOLATA J. VEGA K. A. KRYGER (Department of Physics, University of Notre Dame, Notre Dame, IN 46556, U. S. A.) F. W. PROSSER (University of Kansas, Lawrence, KS66045, U. S. A.) P. A. DEYOUNG (Hope College, Holland, MI 49423, U. S. A.)

【机构】 中国科学院上海原子核研究所; Department of Physics University of Notre Dame; Notre Dame In46556 U.S.A.; Department of Physics; University of Notre Dame; University of Kansas; Lawrence KS66045 U.S.A.; Hope College; Holland MI49423 U.S.A.; 201800;

【摘要】 我们用两个带电粒子符合方法研究了能量为56MeV的16O轰击12C的三体反应出射道,分别得到了两个不同的三体出射道:α1+α2+20Ne和p+α+23Na的反应Q值谱,两道之间的比为8:1,同时得到了α1+α2两维符合事件的投影谱,结果显示α+24Mg是α1+α2+20Ne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,8Be1st+20Ne*,然后8Be1st→α1+α2的连续衰变机制也是不能完全排除的。

【Abstract】 Three-body exit channel in the reaction 12C+16O 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+24Mg is the main intermediate process of three-body exit channel α1+α2+ 20Ne in the reaction 12C+16O at 56MeV. The analysis of theoretical calculation showed that the sum of sequential decay and statistical break-up fit the experimental spectra satisfactorily.

  • 【文献出处】 高能物理与核物理 ,High Energy Physics and Unclear Physics , 编辑部邮箱 ,1991年08期
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