Stabilization of primary mobile radiation defects in MgF2 crystals; Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms; Vol. 374 : Basic Research on Ionic-Covalent Materials

Stabilization of primary mobile radiation defects in MgF2 crystals; Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms; Vol. 374 : Basic Research on Ionic-Covalent Materials

Bibliografski detalji
Parent link:Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms.— , 1984-
Vol. 374 : Basic Research on Ionic-Covalent Materials.— 2016.— [P. 24-28]
Autor kompanije: Национальный исследовательский Томский политехнический университет Институт физики высоких технологий Кафедра лазерной и световой техники
Daljnji autori: Lisitsyn V. M. Viktor Mikhailovich, Lisitsyna L. A. Lyudmila Aleksandrovna, Popov A. I. Aleksandr Ivanovich, Kotomin E. A. Evgeny Aleksandrovich, Abuova F. U. Fatima Usenovna, Akilbekov A. T. Abdirash Tasanovich, Maier J.
Sažetak:Title screen
Non-radiative decay of the electronic excitations (excitons) into point defects (F–H pairs of Frenkel defects) is main radiation damage mechanism in many ionic (halide) solids. Typical time scale of the relaxation of the electronic excitation into a primary, short-lived defect pair is about 1–50 ps with the quantum yield up to 0.2–0.8. However, only a small fraction of these primary defects are spatially separated and survive after transformation into stable, long-lived defects. The survival probability (or stable defect accumulation efficiency) can differ by orders of magnitude, dependent on the material type; e.g. ?10% in alkali halides with f.c.c. or b.c.c. structure, 0.1% in rutile MgF2 and <0.001% in fluorides MeF2 (Me: Ca, Sr, Ba). The key factor determining accumulation of stable radiation defects is stabilization of primary defects, first of all, highly mobile hole H centers, through their transformation into more complex immobile defects. In this talk, we present the results of theoretical calculations of the migration energies of the F and H centers in poorely studied MgF2 crystals with a focus on the H center stabilization in the form of the interstitial F2 molecules which is supported by presented experimental data.
Режим доступа: по договору с организацией-держателем ресурса
Jezik:engleski
Izdano: 2016
Teme:
электронный ресурс
труды учёных ТПУ
экситоны
радиационные дефекты
Online pristup:http://dx.doi.org/10.1016/j.nimb.2015.08.002
Format: Elektronički Poglavlje knjige
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=648589

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