On the Cerenkov Radiation
On the Cerenkov Radiation
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关于切伦科夫辐射
DOI：
10.1143/ptp/6.2.207
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发表时间：
1951
影响因子：
--
通讯作者：
T. Taniuti
中科院分区：
文献类型：
--
作者：
T. Taniuti
切伦科夫等人已经观察到，在透明介质中行进的速度大于光在该介质中的速度的快速电子发射定向可见辐射，并且光的方向由cos θ = 1/（3 π）给出，其中θ是光的方向与入射电子之间的角度;（3 π =v/c，v是电子的速度; c是真空中的光速，n是介质的折射率。这种辐射的理论解释已经由几位作者不仅从经典的角度，而且从量子电动力学的角度给出了，但是，他们中的许多人从现象学的角度引入了介质的折射率n，因此辐射的机制似乎有些模糊。特别是在量子电动力学中，光子在介质中的能量动量关系在唯象考虑上是不能令人满意的。例如，当电场强度E像往常一样发展时，
It has been observed by Cerenkov and others,t) that a fast electron travelling the transparent medium, whose velocity is greater than that of light in that medium, emits a directed visible radiation, and the direction of light is given by cos 8= l/(3n, where 8 is the angle between the direction of light and the incident electron; (3=v/c, v the velocity of the electron; c, the velocity of light in the vacuum; and n, the ,refractive index of that medium. The theoretical explanations of this radiation have de en given by several authors not only classically but also quantum-electrodynamically, on each different standpoint of view.2l Many of them, however, introduced the refractive index n of the medium phenomenologically and so the mechanism of the radiation seems to be somewhat obscure. Especially, in the quantum-electrodynamics, the energy momentum relations of photon in the medium3) are given unsatisfactorily on the phenomenological considel,"ations. For an example, when the electric field strength E is developed as usual