Deposition of Radiation Energy
Deposition of Radiation Energy
复制标题
辐射能的沉积
DOI：
10.1007/978-3-642-83769-2_4
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
J. Kiefer
中科院分区：
文献类型：
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作者：
J. Kiefer
通过辐射向生物系统传递能量具有重要的基础和实际意义。电离辐射的中心量是剂量（每单位质量吸收的能量）;然而，能量转移和能量沉积之间存在差异，这将在下文中详细解释。吸收事件的空间分布也起着重要的作用，这是宏观上描述的“线性能量转移”（LET）。这一概念的适用性进行了批判性的讨论。在微观尺度的随机性质的能量吸收事件变得重要，这是一个问题下处理的标题“微剂量学”。接着将描述电离粒子径迹附近的能量沉积。上述定义的剂量概念通常对光辐射没有意义;因此，引入了其他相关量，如光子或能量注量。
Energy transfer by radiation to biological systems is both of fundamental and practical importance. The central quantity with ionizing radiation is the dose (absorbed energy per unit mass); However, there is a difference between energytransferredand energydeposited, as will be explained in detail. The spatial distribution of absorption events also plays a significant role which is macroscopically described by the “linear energy transfer” (LET). The applicability of this concept is critically discussed. In microscopical dimensions the stochastic nature of energy absorption events becomes important, an issue which is dealt with under the heading “microdosimetry”. This will be followed by a description of the energy deposition in the close vicinity of the track of an ionizing particle. The concept of dose as defined above is generally not meaningful with optical radiation; thus, other relevant quantities such as photon or energy fluence are introduced.