Fast neutrons produced by nuclear fragmentation in treatment irradiations with 12C beam
Fast neutrons produced by nuclear fragmentation in treatment irradiations with 12C beam
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DOI：
10.1093/rpd/nch138
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发表时间：
2004-01-01
影响因子：
1
通讯作者：
Simon, RS
中科院分区：
文献类型：
--
作者：
Gunzert-Marx, K;Schardt, D;Simon, RS
在GSI的重离子肿瘤治疗项目的框架内，我们研究了200 AMeV碳离子在12.78 cm厚的吸水剂中停止的核碎裂。用由NE 102和BaF 2闪烁体组成的DeltaE-E望远镜在0 °和30 °之间的前向角记录从靶中射出的快中子和带电粒子。我们得到了中子能谱和角分布，并推导出在前半球的能量范围从10到500 MeV的中子产额。此外，我们在实际患者治疗辐照中进行了碎片测量。由此产生的中子和带电粒子的角分布以及它们的产额与水吸收剂获得的结果相似。
In the framework of the heavy-ion tumour therapy project at GSI we investigated the nuclear fragmentation of 200 AMeV carbon ions stopping in a 12.78-cm thick water absorber. Fast neutrons and charged particles emerging from the target were registered at forward angles between 0degrees and 30degrees with a DeltaE-E-telescope consisting of an NE102 and a BaF2 scintillator. We obtained neutron energy spectra and angular distributions and derived the neutron yield in the energy range from 10 to 500 MeV in the forward hemisphere. In addition, we performed fragmentation measurements in actual patient treatment irradiations. The resulting angular distributions of neutrons and charged particles as well as their yields are similar to those obtained with the water absorber.