非Maxwell分布下平均热核反应率的计算

Calculation of Average Thermonuclear Reaction Rate Under Unthermal Balance

研究氘氚(DT)服从不同的速度分布函数时平均热核反应率的计算,当T服从Maxwell分布,D服从Maxwell分布、单能分布、一类特殊的非Maxwell分布时,用Monte Carlo方法(蒙卡方法)和直接积分两种方法同时计算DT的平均热核反应率,并验证蒙卡方法的正确性.利用蒙卡方法计算非Maxwell分布时的DT平均热核反应率,与Maxwell分布下的结果有较大的差别,说明在类似的情况下如果采用热动平衡下的平均热核反应率会引入较大的误差,相关认识可供非平衡效应研究参考.

Importance of accurate calculation of average reaction rate in thermonuclear reactions is introduced.Two types of nuclear involved in thermonuclear reactions are assumed in thermal equilibrium state under same temperature.With comparison between analytical expressions of average reaction rate and average rate of thermonuclear reaction using MC method directly,correctness of MC method is obtained.Finally,MC method is extended to calculation of average thermonuclear reaction rate in several typical distributions.