论文标题
对齐晶体中的量子与经典方法与经典方法
Quantum versus classical approach of dechanneling and incoherent electromagnetic processes in aligned crystals
论文作者
论文摘要
颗粒以小角度在对齐的晶体W.R.T.晶体学轴或平面主要由连续的Lindhard电位来指导。这种相互作用可以节省能量E，即纵向动量P_PARALALL，粒子E_PERP的横向能，并且与晶体量子状态有关。在足够高的能量下，粒子运动是准经典的。原子位置或晶体电子位置的时间依赖性波动产生了残余电势，粒子可以在其上散射。这种相互作用不能保存先前的数量，并且对于晶体而言是无弹性的。我们将其处理方法与经典的二进制碰撞模型和现象学量子模型进行了比较。经典的切道率估计比量子大百分之十。讨论了相邻原子的相关振动的影响。
Particles traveling in aligned crystals at small angles w.r.t. crystallographic axes or planes are principally steered by the continuous Lindhard potential. This interaction conserves the energy E, the longitudinal momentum p_parallel, the transverse energy of the particle E_perp and is elastic concerning the crystal quantum state. At high enough energy the particle motion is quasi-classical. The time-dependent fluctuations of the positions of the atoms or of the electrons of the crystal create a residual potential, on which the particle can scatter. This interaction does not conserve the previous quantities and is inelastic for the crystal. We compare its treatments with the classical binary collision model and with a phenomenological quantum model. The classical dechanneling rate is estimated to be several ten per cent larger than the quantum one. The influence of correlated vibrations of neighboring atoms is discussed.
