γ射线空间分布与双屏蔽圆柱形核裂变材料的几何信息  

Space Distribution of γ-Ray and Geometric Information of Cylindrical Fissile Material with Dual Shields

作　　者：吴晨彦[1] 田东风[2] 黄永义[2] 程逸颖 陆福全[2] 

机构地区：[1]复旦大学数学学院,上海200433 [2]复旦大学现代物理研究所 [3]美国罗得岛州罗得岛大学物理系,ri028810817

出　　处：《复旦学报（自然科学版）》2006年第4期464-468,共5页Journal of Fudan University：Natural Science

摘　　要：给出了带双屏蔽层的圆柱形核裂变材料的自吸收和屏蔽吸收几何因子(G因子)的精确数学表达式,特别推导几种在实际应用中有价值的近似形式,给出圆柱形核裂变材料的4π空间G因子分布规律;提出一种快速求解圆柱核裂变材料几何特性(圆柱的高与半径)的方法,并用数值计算得出的精确G因子值验证了该方法的可行性.The analytical expression of the Gecrnetric Factor （ G Factor） of γ-ray self-absorption and shield attenuation for cylindrical fissile material with dual shields were given. Approximations valuable for practical applications and the 4π-Spaee distribution pattern of G factor for cylindrical fissile material were also deduced. One fast way to solve the geometric informarion, i. e., height and radius of the cylinder, was verified by numerically calculated G factor.

关 键 词：核裂变材料 同位素构成 γ射线自吸收 双层屏蔽 

分 类 号：TL352[核科学技术—核技术及应用] TL375.6