Study on heavy-ion beam time-resolved absorption spectroscope

重离子束时间分辨吸收光谱仪的研究

基本信息

批准号：
17560746
负责人：
YANG Jinfeng
金额：
$ 2.11万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

项目摘要

The study of the primary process of heavy-ion beam induced radiation chemistry is very important for opening the wide application field of ion radiation. A new heavy-ion beam pulse radiolysis based on absorption spectroscopy was developed and used to study the behavior of radicals generated by heavy-ion beam radiation.(1)Development of heavy-ion beam pulse radiolysisFor heavy-ion beams, there are many difficulties to the absorption spectroscopy, such as the low intensity in ion beam, the penetration of the ion beam into material, the light source, and so on. To overcome the difficulties, we developed at first a heavy-ion-pulse radiolysis based on an advanced analyzing-light produced by ion beam radiation in a scintillator. The time resolution of the pulse radiolysis was achieved to be nano/picosecond time region by using a single-photon-counting technique.(2)Study of primary process of heavy-ion beam induced radiation chemistryThe transient absorption kinetics of radicals or short-lived species generated by heavy-ion-beam radiation (such as 220MeV 12C^<5+> ion beam) was measured successfully on nano/picosecond time scale by using the heavy-ion beam pulse radiolysis. The high linear-energy-transfer (LET) effects of the heavy-ion beam on materials were studied and compared with the low LET beam radiation, such as the electron beam radiation.

对重离子束诱导的辐射化学的主要过程的研究对于打开离子辐射的广泛应用领域非常重要。开发了一种基于吸收光谱的新型重离子束脉冲放射分解，并用于研究由重离子束辐射产生的自由基的行为。（1）（1）增强型重离子束脉冲辐射式重型离子束存在许多困难，吸收光谱镜像在离子束中的低强度，例如离子束的渗透率，以及在ION束的渗透中，以及在物质上，以及在物质上，以及在物质上，以及在物质上，以及在灯光上，也是如此。为了克服困难，我们最初是根据闪烁体中离子束辐射产生的高级分析光的重型离子 - 脉冲辐射分解的。通过使用单光子计数技术来实现脉冲放射分解的时间分辨率为纳米/皮秒时间区域。（2）对自由基或短效率的重型离子束诱导的辐射动力学的主要过程研究的研究（220mever topirated beam inan topiration topecy of 220meev wate wase topecy topecy of 220meent pec^^^^<5+ <5+ <5+ <5+> ivion fecos to iiN> IIND <5+> iiN ex <5+ ivion fecii。通过使用重离子束脉冲辐射溶解时间尺度。研究了重离子束对材料的高线性能量转移（LET）效应，并将其与低LET束辐射（例如电子束辐射）进行比较。