临近空间核爆炸X射线能注量空间分布的模拟计算  

Calculation of Space Distribution of X-Ray EnergyFluence from Nuclear Detonation in Near Space

作　　者：李夏至 牛胜利 朱金辉 LI Xia-zhi;NIU Sheng-li;ZHU Jin-hui(Northwest Institute of Nuclear Technology,Xi’an 710024,China)

机构地区：[1]西北核技术研究院,西安710024

出　　处：《现代应用物理》2020年第1期10-14,共5页Modern Applied Physics

摘　　要：计算了不同爆高下临近空间核爆炸的裸核区半径和裸核区内的能量沉积份额,分析了裸核区对X射线能注量空间分布的影响。结果表明,当量一定时,裸核区半径随爆高增大而增大,但在爆高达到一定高度后,裸核区半径不再随爆高有明显变化;爆高一定时,裸核区半径随当量增加而增大。将裸核区半径作为新的球形源半径,将核爆炸X射线总能量减去裸核区中沉积的能量作为新的球形源总能量,利用蒙特卡罗方法计算得到了临近空间核爆炸X射线能注量的空间分布。结果表明,在爆高小于60 km时,爆心周围3 km内核爆炸X射线能注量在爆心上下的分布明显不对称;爆高一定时,随着爆心距的增加,测点处X射线的能谱变硬。The effect of the stripped nucleus area on the space distribution of X-ray energy fluence in near space nuclear detonation is analyzed,and the radius of the stripped nucleus area and the energy deposition quota in the stripped nucleus area at different detonation altitudes are calculated.The results show that when the detonation yield is given,the radius of the stripped nucleus area increases with the increase of the detonation altitude,but after the detonation altitude reaches a certain height,the radius of the stripped nucleus area no longer changes significantly with the detonation altitude;when the detonation altitude is given,the radius of the stripped nucleus area increases with the increase of the detonation yield.The space distribution of the X-ray energy fluence of the nuclear detonation is calculated by using Monte Carlo method.The results show that the distribution of X-ray energy fluence around the center of the nuclear detonation in 3 km is obviously asymmetric when the detonation altitude is less than 60 km.When the detonation altitude is given,the energy spectrum of X-ray at the measuring point becomes hard with the increase of the detonation center distance.

关 键 词：裸核区 高空核爆炸 碰撞速率 蒙特卡罗模拟 

分 类 号：O562.4[理学—原子与分子物理]