title: Effects of dislocations on channeling radiation from a periodically bent crystal.
abstract: In this paper the effects of dislocations on the positron channeling in a periodically bent crystal are studied. We begin with the unified treatment of the longitudinal and transverse motion of the particle. We then separate out the Schrödinger equation into longitudinal and transverse motions. The variation in effective potential and frequency in the different regions of dislocation affected channels is found. The wavefunctions of positrons channeled in the perfect and the dislocation affected channels are found and the channeling and dechanneling probabilities are calculated. The angular and spectral distributions of radiation intensity are calculated and compared with those of normal channeling. The calculations are carried out with varying values of dislocation density and varying undulator wavelength.
authors.affiliation: School of Physics, University of Hyderabad, Central University PO, Hyderabad-46, India.
authors.forename: Juby
authors.initials: J
authors.lastname: George
authors.forename: A P
authors.initials: AP
authors.lastname: Pathak
authors.forename: A V
authors.initials: AV
authors.lastname: Solov'yov