Radiation-induced defects and processes on the surface of radiation detector oxides according to exoelectron emission data
Creators
- 1. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Moscow (Russian Federation)
Description
Exoelectron emission from materials for high-sensitivity thermoluminescence (TL) and exoelectron emission (EE) dosimeters based on α-Al2O3, BeO, and LiF was examined. A scheme for the formation of TL and EE centers induced by low-penetrating (β, α) radiation was proposed, and their relation to electron and hole (F, VK) centers and to the emergence of dosimetric peaks during dose readout (thermal stimulation) was revealed. A unified approach to the interpretation of the phenomenon of thermally stimulated emission (TSEE) from these materials in terms of valence transformations of oxygen that is weakly bound to the surface was developed. The difficulties in the manufacture of hybrid high-sensitivity TL-TSEE dosimeters are explained from the standpoint of the physicochemical mechanism of exoelectron emission
Abstract (Russian)
Представлены результаты исследования экзоэмиссии материалов высокочувствительных термолюминесцентных (ТЛ) и экзоэмиссионных (ЭЭ) дозиметров на основе α-Аl2О3, BeO, LiF и предложена схема образования центров ТЛ и ЭЭ при действии слабопроникающих (β, α) излучений, их взаимосвязь с электронными и дырочными (F, VK) центрами и проявлением дозиметрических пиков при считывании дозы (термостимуляции). Разработан единый подход к трактовке явления термостимулированной эмиссии (ТСЭ) исследованных материалов на основе валентных превращений слабосвязанного с поверхностью кислорода. С позиций физико-химического механизма экзоэмиссии обоснованы трудности в создании комбинированных высокочувствительных ТЛ-ТСЭ-дозиметровAdditional details
Additional titles
- Original title (Russian)
- Радиационно-индуцированные дефекты и процессы на поверхности оксидов - детекторов ионизирующих излучений по данным экзоэмиссии
Publishing Information
- Journal Title
- Khimiya Vysokikh Ehnergij
- Journal Volume
- 41
- Journal Issue
- 5
- Journal Page Range
- p. 384-389
- ISSN
- 0023-1193
- CODEN
- KHVKAO
INIS
- Country of Publication
- Russian Federation
- Country of Input or Organization
- Russian Federation
- INIS RN
- 39021391
- Subject category
- S36: MATERIALS SCIENCE; S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Descriptors DEI
- ALPHA PARTICLES; ALUMINIUM OXIDES; BERYLLIUM OXIDES; BETA PARTICLES; CHEMICAL RADIATION EFFECTS; ELECTRON EMISSION; EXOELECTRON DOSEMETERS; LITHIUM FLUORIDES; PHYSICAL RADIATION EFFECTS; RADIATION DOSES; RADIOTHERMOLUMINESCENCE; TEMPERATURE RANGE 0400-1000 K; THERMOLUMINESCENT DOSEMETERS; VACANCIES
- Descriptors DEC
- ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; ALUMINIUM COMPOUNDS; BERYLLIUM COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; DOSEMETERS; DOSES; EMISSION; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; IONIZING RADIATIONS; LITHIUM COMPOUNDS; LITHIUM HALIDES; LUMINESCENCE; LUMINESCENT DOSEMETERS; MEASURING INSTRUMENTS; OXIDES; OXYGEN COMPOUNDS; PHOTON EMISSION; POINT DEFECTS; RADIATION EFFECTS; RADIATIONS; RADIOLUMINESCENCE; TEMPERATURE RANGE; THERMOLUMINESCENCE
Optional Information
- Notes
- 28 refs., 5 figs.