核反应R矩阵理论是研究轻核反应以及中重和重核共振能区核反应的重要理论方法.包含能级矩阵非对角元贡献的完全R矩阵理论在理论上比较严格.根据不同的假定和近似得到不同的R矩阵计算方法.新编的R矩阵程序FDRR包含了4种计算方法,包括约化道多能级Breit-Wigner方法、完全约化R矩阵方法、非对角化能级位移约化R矩阵方法及对角化能级位移约化R矩阵方法.可计算轻核各种两体反应道的截面、角分布.利用FDRR程序对n+6Li反应20 MeV以下能区进行理论分析和计算,理论计算结果与实验数据进行了比较分析,理论计算得到的截面和角分布与实验数据符合得很好.
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