2024/11/11 by Maykel Márquez‐Mijares, Marquez-Mijares, Maykel, G. Rojas‐Lorenzo +7
Engineering · Materials Science · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #Atomic Physics (physics.atom-ph) #Crystallography and Radiation Phenomena #FOS: Physical sciences #Muon and positron interactions and applications #Solid-state spectroscopy and crystallography
paper · pdf · doi:10.48550/arxiv.2411.07100
openalex publication_date 2024/11/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
This paper reports on a comprehensive study of an ultra-relativistic positron beam deflection by an oriented quasi-mosaic crystal. The analysis was carried out for the positron energy of 530 MeV incident on the quasi-mosaic bent Si(111) crystal. This particular case was chosen because it has recently been studied experimentally at the Mainz Microtron MAMI. The results of the relativistic molecular dynamics simulations were compared with the experimental observations and a good agreement was found. The presence of planar channeling, de-channeling, volume reflection and volume capture processes in the angular distribution of deflected positrons for different beam-crystal alignments has been studied. Predictions have been made for certain crystal orientations for which experimental data are lacking.