Modification of the theory of diffracted channeling radiation for axial electron and positron channeling
Modification of the theory of diffracted channeling radiation for axial electron and positron channeling
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轴向电子和正电子沟道衍射沟道辐射理论的修正
DOI：
10.1134/s1027451010040105
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
K. B. Korotchenko
中科院分区：
文献类型：
--
作者：
K. B. Korotchenko
研究了相对论电子（正电子）横向运动亚势垒（带间）跃迁引起的一种新的组合沟道辐射。它被称为衍射沟道辐射（DCR）。通过考虑电子（正电子）横向运动能级的能带结构，得到了描述轴向沟道情况下DCR角分布的公式。结果表明，在虚光子波函数A（r）的二波近似下，轴向沟道和平面沟道的偶极近似下的DCR矩阵元在形式上是一致的（考虑了问题的维数）。然而，在轴向沟道和平面沟道的情况下，DCR角分布的公式有很大的不同。
A new type of combinational channeling radiation induced by subbarrier (interband) transitions for the transverse motion of relativistic electrons (positrons) is studied. It is known as diffracted channeling radiation (DCR). The formula describing the DCR angular distribution in the case of axial channeling is obtained by taking into account the band structure of energy levels for the transverse motion of electrons (positrons). It is shown that, in the two-wave approximation of the wave functionA(r) of virtual photons, the DCR matrix elements in the dipole approximation for axial and plane channeling coincide formally (with the dimension of the problem taken into account). However, the formulas for DCR angular distributions in the cases of axial and plane channeling differ considerably.