Speaker
Description
N.V. Maksyuta, V.I. Vysotskii, A.O. Stakhova, D.N. Maksyuta
Faculty of Radio Physics, Electronics and Computer Systems Taras Shevchenko Kyiv National University of Kyiv, Glushkova ave., 4g
This paper continues the study of the features of spectral distributions of spontaneous radiation arising from the channeling of relativistic (including weakly relativistic) electrons in complex crystals, which was started in [1, 2]. In particular, the channeled motion in the main crystallographic planes (100), (110) and (111) of the BaTiO3 crystal is studied at temperatures above the Curie temperature, when this crystal with a perovskite structure is in the cubic (paraelectric) phase.
Calculation of the interaction potentials in this ionic crystal BaTiO3 showed that in all main planes on one lattice period there are two potential wells with different depths. It was shown that the contribution of the Coulomb terms to the total interaction potential is most significant in the (111) planes. Changes in the interaction potentials with increasing temperature were also investigated.
As a result of the numerical solution of the Schrödinger equation using a technique similar to [1, 2], the transverse energy levels and the corresponding wave functions were found for those Lorentz-factors that were used in work [3] in the case of electron channeling in the (111) planes in the ionic crystal LiF. It was shown also that only in these planes there are two potential wells with different depths in one period.
Using these data, spectral distributions of spontaneous emission were also calculated and it was shown that, due to the deeper potential wells in the BaTiO3 crystal than in the LiF crystal, the intensities of spontaneous short-wave radiation are higher.
References
[1] N.V. Maksyuta, V.I. Vysotskii, A.O. Stakhova, Yu.A. Slinchenko. Study of spontaneous shortwave radiation during channeling of weakly relativistic electrons in the main crystallographic planes of tetrafluoroaluminates, Nucl. Instr. and Meth. in Phys. Res. A 1075 (2025) 170419.
[2] M.V. Maksyuta, A.O. Stakhova, V.I. Vysotskii, S.V. Efimenko. Study of spontaneous shortwave radiation during channeling of low-relativistic electrons in the main planes of a fluorite crystal, Book of proceedings of The 20th Int. Conf. on Electronics and applied physics, Taras Shevchenko National University of Kyiv, Faculty of RadioPhysics, October 20 – 25, 2024, Kyiv (Ukraine), pp. 54 – 55.
[3] N.V. Maksyuta, V.I. Vysotskii, S.V. Efimenko. Quasicharacteristic radiation of relativistic electrons at orientation motion in lithium halides crystals along charged planes and axe, J. Phys.: Conf. Series. 732 (2016) 012023.
E-mail: stakhovaanastasiia@gmail.com
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