Quantum description for the effects of strained layered superlattices on channeling radiation

Abstract

The transverse motion of relativistic electrons (e-) and positrons (e+) during their motion along the crystallographic channels is quantized and the spontaneous transitions among these energy levels lead to what is known as channeling radiation. Quantum mechanical formulation is developed for dechanneling of these light particles, by incorporating the effects of deformations across the interfaces of the strained multi-layered structures. Simple harmonic type (one dimensional hydrogen atom type) potential is used to describe the transverse motion of planar-channeled positrons (electrons). In addition, the transitions among these bound states are considered for e-, e+ and the corresponding radiation characteristics like initial populations and the re-distribution due to the strain are studied in quantum mechanical framework. Channeling angular scans are obtained using the simple quantum mechanical concepts. © 2002 Elsevier Science B.V. All rights reserved.