Praena J, Sabaté-Gilarte M, Porras I, Esquinas P L, Quesada J M, Mastinu P
Universidad de Sevilla, Spain; Centro Nacional de Aceleradores (US-JA-CSIC), Seville, Spain.
Universidad de Sevilla, Spain; Centro Nacional de Aceleradores (US-JA-CSIC), Seville, Spain.
Appl Radiat Isot. 2014 Jun;88:203-5. doi: 10.1016/j.apradiso.2013.12.039. Epub 2014 Jan 9.
(33)S is a stable isotope of sulfur for which the emission of an α-particle is the dominant exit channel for neutron-induced reactions. In this work the enhancement of both the absorbed and the equivalent biologically weighted dose in a BNCT treatment with 13.5keV neutrons, due to the presence of (33)S, has been tested by means of Monte Carlo simulations. The kerma-fluence factors for the ICRU-4 tissue have been calculated using standard weighting factors. The simulations depend crucially on the scarce (33)S(n,α)(30)Si cross-section data. The presence of a high resonance at 13.5keV was established by previous authors providing discrepant resonance parameters. No experimental data below 10keV are available. All of this has motivated a proposal of experiment at the n_TOF facility at CERN. A setup was designed and tested in 2011. Some results of the successful test will be shown. The experiment is scheduled for the period November to December 2012.
（33）S是硫的一种稳定同位素，对于中子诱发反应而言，发射α粒子是其主要的出射通道。在这项工作中，通过蒙特卡罗模拟测试了在使用13.5keV中子的硼中子俘获疗法（BNCT）治疗中，由于（33）S的存在，吸收剂量和等效生物加权剂量的增强情况。已使用标准加权因子计算了ICRU - 4组织的比释动能注量因子。这些模拟结果严重依赖于稀少的（33）S（n，α）（30）Si截面数据。先前的作者确定在13.5keV处存在一个高共振峰，但给出的共振参数存在差异。目前尚无低于10keV的实验数据。所有这些促使人们提议在欧洲核子研究组织（CERN）的n_TOF设施上开展实验。2011年设计并测试了一个装置。将展示成功测试的一些结果。该实验计划于2012年11月至12月期间进行。
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