RESONANCE DECHANNELING IN QUASI-PERIODIC SUPERLATTICES

Planar dechanneling of ions is investigated in strained-layer quasiperiodic superlattices with two types of layers, A and B, arranged according to the recurrent Fibonacci rule. It is shown that in quasiperiodic superlattices with tau-l(A) + l(B) < lambda (where l(A) and l(B) are the respective thicknesses of the layers A and B, tau is the golden section, lambda the wavelength of transverse particle oscillations in the channel) the dechanneling is a resonance process. Angular dependences of the dechanneling length are asymmetric and stepwise. The resonance dechanneling in strained-layer quasiperiodic superlattices may be used for the determination of elastic distortions even in the case when the layer thicknesses are as small as l(A), l(B) << lambda. This feature is absent in the case of periodic superlattices.