使用扩展的邦纳球和组织等效正比计数器测量中子注量和剂量能谱。

Measurement of the neutron fluence and dose spectra using an extended bonner sphere and a tissue-equivalent proportional counter.

作者信息

Kim B H, Chang S Y, Lee H S, Cho G

机构信息

Korea Atomic Energy Research Institute, PO Box 105, Yuseong, Daejeon 305-600, Korea.

出版信息

Radiat Prot Dosimetry. 2004;110(1-4):717-23. doi: 10.1093/rpd/nch182.

DOI:10.1093/rpd/nch182

PMID:15353737

Abstract

A conventional Bonner Sphere (BS) set consisting of six polyethylene spheres was modified to enhance its response to a high-energy neutron by putting a lead shell inside a polyethylene moderator. The response matrix of an extended BS was calculated using the MCNPX code and calibrated using a 252Cf neutron source. In order to survey the unknown photon and neutron mixed field, a spherical tissue equivalent proportional counter (TEPC) was constructed and assembled as a portable measurement system. The extended BS and the self-constructed TEPC were employed to determine the dosimetric quantities of the neutron field produced from the thick lead target bombarded by the 2.5 GeV electron beam of Pohang Accelerator Laboratory (PAL) and the neutron calibration field of Korea Atomic Energy Research Institute (KAERI).

摘要

一种由六个聚乙烯球组成的传统博纳球（BS）装置进行了改进，通过在聚乙烯慢化剂内部放置一个铅壳来增强其对高能中子的响应。使用MCNPX代码计算了扩展博纳球的响应矩阵，并使用²⁵²Cf中子源进行了校准。为了测量未知的光子和中子混合场，构建了一个球形组织等效正比计数器（TEPC）并组装成一个便携式测量系统。使用扩展博纳球和自行构建的TEPC来确定由浦项加速器实验室（PAL）的2.5 GeV电子束轰击厚铅靶产生的中子场以及韩国原子能研究所（KAERI）的中子校准场的剂量学量。