Grosswendt B, Conte V, Colautti P
Guest at LNL-INFN, viale dell'Università 2, Legnaro I-35020, Italy.
LNL-INFN, viale dell'Università 2, Legnaro I-35020, Italy
Radiat Prot Dosimetry. 2014 Oct;161(1-4):464-8. doi: 10.1093/rpd/nct322. Epub 2013 Dec 9.
The track nanodosemeter developed at the National Laboratories of Legnaro (LNL), Italy allows the direct investigation of the properties of particle tracks, by measuring ionisation-cluster-size distributions caused by ionising particles within a 'nanometre-sized' target volume while passing it at a well-specified impact parameter. To supplement the measurements, a dedicated Monte Carlo code was developed which is able to reproduce the general shape of measured cluster-size distributions with a satisfactory quality. To reduce the still existing quantitative differences between measured and simulated data, the validity of cross sections used in the Monte Carlo model was revisited again, taking into account the large amount of data available now from recent track structure measurements at LNL. Here, special emphasis was laid on a deeper and detailed investigation of the cross sections applied to calculate the energy of secondary electrons after impact ionisation of primary particles: the cross sections due to the HKS model and the so-called Rudd model. Representative results for 240 MeV (12)C-ions are presented.
意大利莱尼亚罗国家实验室（LNL）研发的径迹纳米剂量仪，能够通过测量电离粒子在“纳米级”靶体积内以特定碰撞参数穿过时所产生的电离簇尺寸分布，直接研究粒子径迹的特性。为辅助测量，开发了一个专用的蒙特卡罗代码，它能够以令人满意的质量再现测量的簇尺寸分布的一般形状。为减少测量数据与模拟数据之间仍然存在的定量差异，鉴于LNL近期径迹结构测量现有的大量数据，再次重新审视了蒙特卡罗模型中使用的截面的有效性。在此，特别强调对用于计算初级粒子碰撞电离后二次电子能量的截面进行更深入、详细的研究：即HKS模型和所谓的Rudd模型的截面。给出了240 MeV（12）C离子的代表性结果。
