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Calculations of dose equivalent quantities for high-energy neutrons using homogeneous and heterogeneous phantoms.

机译：使用均质和异质体模计算高能中子的剂量当量。

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摘要

Monte Carlo calculations of fluence-to-dose conversion factors have been performed using the Pacific Northwest Laboratory (PNL) versions of the MIRD-V male and female anthropomorphic phantoms and the International Commission on Radiation Units and Measurements (ICRU) spherical phantom. The phantoms were irradiated with monoenergetic, parallel neutron beams over the energy range from 10 to 180 MeV. The impacts of the new radiation protection quantities recommended in the International Commission on Radiological Protection (ICRP) Publication 60 were explored. Ambient dose equivalents and deep dose equivalent indices were calculated using both the ICRP 21 and ICRP 60 Q-L relationships. The LAHET computer code was utilized to perform the energy deposition calculations for neutrons above 20 MeV. Secondary charged particles are tracked down to 1 MeV in LAHET. Lower-energy neutrons and neutron-induced photons were transported using the HMCNP code and the ENDF/B-V continuous-energy cross-section data library. The results were compared with the limited dosimetric data now available for high-energy neutrons. The ambient dose equivalent and the deep dose equivalent index were found to underestimate the effective dose for energies higher than 50 MeV.
机译：使用MIRD-V男性和女性拟人化体模的太平洋西北实验室（PNL）版本以及国际辐射单位和测量委员会（ICRU）球形体模，已经进行了通量剂量转换因子的蒙特卡罗计算。用能量在10到180 MeV范围内的单能平行中子束辐照人体模型。探索了国际放射防护委员会（ICRP）出版物60中建议的新辐射防护量的影响。使用ICRP 21和ICRP 60 Q-L关系式计算环境剂量当量和深剂量当量指数。 LAHET计算机代码用于对20 MeV以上的中子进行能量沉积计算。在LAHET中，次级带电粒子被追踪到1 MeV。使用HMCNP代码和ENDF / B-V连续能量截面数据库来运输低能中子和中子诱导的光子。将结果与目前可用于高能中子的有限剂量学数据进行了比较。发现环境剂量当量和深剂量当量指数低估了高于50 MeV能量的有效剂量。

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  • 作者

    Nabelssi, Bassel Kassas.;

  • 作者单位

    The University of Texas at Austin.;

  • 授予单位 The University of Texas at Austin.;
  • 学科 Engineering Nuclear.; Chemistry Nuclear.; Chemistry Radiation.
  • 学位 Ph.D.
  • 年度 1993
  • 页码 142 p.
  • 总页数 142
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 原子能技术;无机化学;化学;
  • 关键词

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