期刊论文

Wang, J.-H.

中文

核电子学与探测技术

0258-0934

2008

28

3

533-537

10.3969/j.issn.0258-0934.2008.03.021

本校为其他机构

本研究采用蒙特卡罗方法MCNP对BGO（Bi_4 Ge_3 O_(12)）晶体探测器Marinelli Breaker（简称MB）容器的优化设计；气体放射源MB容器内的气体发生β^＋衰变后，接着正电子与负电子湮没后发射γ射线。设计中，首先通过计算γ射线的数量来确定BGO晶体探测器金属包壳厚度与峰值效率关系；计算结果显示当BGO金属包壳厚度为0．7mm-1．0mm时，峰值效率达到最大。根据这一金属尺寸，我们进一步设计了MB容器的最佳尺寸，这种尺寸使探测器的探测效率较高而费用较少。从而达到满足生产这种探测器的要求。

In this study, we use MCNP Monte Carlo method to optimize the design of Marinelli Beaker (MB) of BGO (Bi 4Ge 3O 12) crystal detector which occurs β + decay from the gas source and further produce positron and then positron-electron annihilation to produce γ ray. We first calculate the number of γ ray to determine the relation between the thickness of metal layer of BGO crystals detector and the peak value efficiencies. Our results show that the peak value efficiency arrive the maximum value point when the metal layer with thickness of 0.7 mm...