Track‐core radius of charged particles at relativistic speed in condensed media
Track‐core radius of charged particles at relativistic speed in condensed media
复制标题
凝聚态介质中带电粒子相对论速度的径迹半径
DOI：
10.1063/1.1681125
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发表时间：
1974
影响因子：
4.4
通讯作者：
A. Mozumder
中科院分区：
文献类型：
--
作者：
A. Mozumder
描述了一种实用的方法来确定相对论速度的带电粒子穿透凝聚介质的径迹核心尺寸。它基于将从费米理论得到的最大碰撞参数处向外的能量流等同于由玻尔应用绝热不变性原理所产生的阻止本领中被忽略的部分。如此得到的核心尺寸随着入射粒子的速度增加，在光速时趋近一个有限极限（对于液态水约为132埃）。已经估算了由切伦科夫辐射和分子激发在大于核心半径的距离处带电粒子的直接能量转移，并且表明在大多数情况下是可忽略的。
A practical procedure is described to determine the core‐size of tracks of charged particles of relativistic speed penetrating a condensed medium. It is based on equating the energy flow outwards at the maximum impact parameter obtained from Fermi's theory to the neglected part of stopping‐power arising from Bohr's application of the principle of adiabatic invariance. The core size so obtained increases with the speed of the impinging particle approaching a finite limit at the speed of light (about 132 A for liquid water). The direct energy trnsfer from the charged particles at distances greater than the core‐radius arising from Crenkov radiation and molecular excitation has been estimated and shown to be negligible in most cases.