Andrews H R, Noulty R A, Ing H, d'Errico F, Lewis B J, Bennett L G I, Green A R
Bubble Technology Industries, Chalk River, Ontario, Canada K0J 1J0.
Radiat Prot Dosimetry. 2006;120(1-4):480-4. doi: 10.1093/rpd/nci688. Epub 2006 Apr 13.
A series of experiments have been recently performed at the Heavy Ion Medical Accelerator in Chiba (HIMAC) laboratory to study the response of bubble detectors to high-mass high-energy (HZE) particles. The motivation for this study was to improve our ability to interpret measurements of neutron energy spectra in space. A recent analysis showed that emulsions of light halocarbons display common properties when they are characterised by a quantity called 'reduced superheat'. This quantity evolved from the examination of neutron and gamma responses of many types of detectors. In this study, we describe direct irradiations with N, Ar and Kr charged particles at HIMAC. It was observed that when the linear energy transfer (LET) corresponding to bubble formation was plotted vs. reduced superheat, different curves were obtained for a particular ion for detectors at different temperatures. Different curves were also obtained when data from different ions were plotted. These results confirm that bubble nucleation is not a simple function of particle LET and that an analysis based on track-structure appears warranted.
最近在千叶重离子医学加速器（HIMAC）实验室进行了一系列实验，以研究气泡探测器对高质量高能（HZE）粒子的响应。这项研究的动机是提高我们解释太空中中子能谱测量结果的能力。最近的一项分析表明，当轻卤代烃乳液以一种称为“折合过热度”的量来表征时，它们表现出共同的特性。这个量是通过对多种探测器的中子和伽马响应进行研究而得出的。在本研究中，我们描述了在HIMAC用氮、氩和氪带电粒子进行的直接辐照。观察到，当将对应于气泡形成的线能量转移（LET）与折合过热度作图时，对于不同温度下的探测器，特定离子会得到不同的曲线。当绘制来自不同离子的数据时，也会得到不同的曲线。这些结果证实，气泡成核不是粒子LET的简单函数，基于径迹结构的分析似乎是必要的。
