RADIATION CHEMISTRY OF HEAVY PARTICLE TRACKS. I. GENERAL CONSIDERATIONS
RADIATION CHEMISTRY OF HEAVY PARTICLE TRACKS. I. GENERAL CONSIDERATIONS
复制标题
重粒子径迹的辐射化学。
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
A. Chatterjee
中科院分区：
文献类型：
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作者：
J. Magee;A. Chatterjee
以统一的方式考虑了稀水溶液中重粒子径迹的辐射化学。重点在于所涉及的物理和化学现象，而非构建用于实际计算的模型，尽管也讨论了后者的问题。重粒子径迹的一个微分段由两部分组成，我们称之为核心和半影；初步的考虑表明，这样一个微分段径迹的所有性质都可以用一个双参数系统唯一地确定，我们选择每个核子的能量（E）和原子序数（Z）作为独立参数。重粒子径迹过程的性质随能量沉积（线性能量传递，LET）的大小而变化，我们分别针对低、中、高LET的情况讨论了三类径迹问题。清除剂反应通常会终止径迹中的自由基复合，对于重粒子径迹，我们找到了一个涉及清除剂浓度的标准，以便将核心和半影方便地分离为基本上不相互作用的部分，从而可以独立处理。考虑了三个区域中核心膨胀的问题，并且发现可以基于甘古利（Ganguly）和马吉（Magee）先前提出的概念构建一个通用模型。提出并讨论了一个基于作者的电子径迹理论的半影模型。
The radiation chemistry of heavy-particle tracks in dilute aqueous solution is considered in a unified manner. Emphasis is on the physical and chemical phenomena which are involved rather than on the construction of models to be used in actual calculations although the latter problem is discussed. A differential segment of a heavy-particle track is composed of two parts which we call core and penumbra; elementary considerations show that all properties of such a differential track can be uniquely specified in terms of a two-parameter system, and we choose energy per nucleon (E) and atomic numbers (Z) as independent parameters. The nature of heavy-particle-track processes varies with the magnitude of the energy deposit (LET), and we discuss three categories of track problems, for low-, intermediate-, and high-LET cases, respectively. Scavenger reactions normally terminate radical recombination in a track, and for heavy-particle tracks we find a criterion involving the scavenger concentration for a convenient separation of core and penumbra into essentially noninteracting parts which can be treated independently. Problems of the core expansion in the three regions are considered, and it is found that a versatile model can be constructed on concepts previously introduced by Ganguly and Magee. A model for themore » penumbra, based on the authors' electron-track theory, is presented and discussed.« less