COHERENT PAIR PRODUCTION IN CRYSTALS IN PRESENCE OF ACOUSTIC WAVES

被引：0
|
作者：
Mkrtchyan, A. R. [1 ]
Saharian, A. A. [1 ]
Parazian, V. V. [1 ]
机构：
[1] Inst Appl Problems Phys, 25 Nersessian St, Yerevan 0014, Armenia
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2010年 / 25卷
关键词：
Interaction of particles with matter; coherent pair production; physical effects of ultrasonics;
D O I：
10.1142/S0217751X10049906
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Coherent electron-positron pair production by high-energy photons is investigated in a periodically deformed single crystal with a complex base. The formula for the corresponding differential cross-section is derived for an arbitrary deformation field. The conditions are specified under which the influence of the deformation is considerable. The case is considered in detail when the photon enters into the crystal at small angles with respect to a crystallographic axis. The results of the numerical calculations are presented for SiO2 single crystal in the case of the deformation field generated by the acoustic wave of the S type. It is shown that, in dependence of the parameters, the presence of deformation can either enhance or reduce the pair creation cross-section.
引用
收藏
页码：47 / 54
页数：8
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