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Radiation defect production in quartz crystals with various structure perfectness degree; Radiatsionnoe defektoobrazovanie v kristallakh kvartsa s razlichnoj stepen`yu sovershenstva struktury

Abstract

Radiation defects production processes in pure and doped quartz crystals with various structure defectness, caused by preliminary irradiation with neutrons, protons, deuterons and {alpha}-particles, during various electron excitation densities were investigated. The distribution of colour centres along the thickness of irradiated quartz crystals was measured. It was supposed that colour centres are produced on account of inelastic energy losses as the result of collective decay of two or more interacting excitons. It was shown that in quartz crystals under the actions of protons with overthreshold energy 18 MeV and electrons with subthreshold energy 100 keV the same structure defects are formed. It was established that radiation defect production process has two stages. The first stage reveals radiation defects produced by preliminary irradiation. The second one reveals additional intrinsic defects formed under the action of gamma-rays and electrons. The probability dependence of defect production on neutron fluence and masses of incident particles was studied. It was supposed that the creation of additional defects in preliminary irradiated crystals is due to non-radiative decay of electron excitations near radiation-induced defects. It was shown that increase of impurity concentration leads to rate growth of accumulation of radiation induced defects. (A.A.D.) 15 refs. 4 figs.
Authors:
Publication Date:
Jan 01, 1992
Product Type:
Miscellaneous
Report Number:
INIS-UZ-033
Reference Number:
SCA: 665300; PA: AIX-28:040340; EDB-97:083682; NTS-97:012918; SN: 97001797402
Resource Relation:
Other Information: TH: Thesis (Kand.nauk).; PBD: Jan 1992
Subject:
66 PHYSICS; QUARTZ; PHYSICAL RADIATION EFFECTS; ABSORPTION SPECTRA; E CENTERS; ELECTRON BEAMS; EXPERIMENTAL DATA; GAMMA RADIATION; MEV RANGE; NEUTRON FLUENCE; OPACITY; PHOTOLUMINESCENCE; PHOTON BEAMS; RADIOLUMINESCENCE
OSTI ID:
480420
Research Organizations:
AN RU, Tashkent (Uzbekistan). Inst. Yadernoj Fiziki
Country of Origin:
Uzbekistan
Language:
Russian
Other Identifying Numbers:
Other: ON: DE97626961; TRN: UZ9700462040340
Availability:
INIS; OSTI as DE97626961
Submitting Site:
INIS
Size:
26 p.
Announcement Date:

Citation Formats

Khushvakov, O B. Radiation defect production in quartz crystals with various structure perfectness degree; Radiatsionnoe defektoobrazovanie v kristallakh kvartsa s razlichnoj stepen`yu sovershenstva struktury. Uzbekistan: N. p., 1992. Web.
Khushvakov, O B. Radiation defect production in quartz crystals with various structure perfectness degree; Radiatsionnoe defektoobrazovanie v kristallakh kvartsa s razlichnoj stepen`yu sovershenstva struktury. Uzbekistan.
Khushvakov, O B. 1992. "Radiation defect production in quartz crystals with various structure perfectness degree; Radiatsionnoe defektoobrazovanie v kristallakh kvartsa s razlichnoj stepen`yu sovershenstva struktury." Uzbekistan.
@misc{etde_480420,
title = {Radiation defect production in quartz crystals with various structure perfectness degree; Radiatsionnoe defektoobrazovanie v kristallakh kvartsa s razlichnoj stepen`yu sovershenstva struktury}
author = {Khushvakov, O B}
abstractNote = {Radiation defects production processes in pure and doped quartz crystals with various structure defectness, caused by preliminary irradiation with neutrons, protons, deuterons and {alpha}-particles, during various electron excitation densities were investigated. The distribution of colour centres along the thickness of irradiated quartz crystals was measured. It was supposed that colour centres are produced on account of inelastic energy losses as the result of collective decay of two or more interacting excitons. It was shown that in quartz crystals under the actions of protons with overthreshold energy 18 MeV and electrons with subthreshold energy 100 keV the same structure defects are formed. It was established that radiation defect production process has two stages. The first stage reveals radiation defects produced by preliminary irradiation. The second one reveals additional intrinsic defects formed under the action of gamma-rays and electrons. The probability dependence of defect production on neutron fluence and masses of incident particles was studied. It was supposed that the creation of additional defects in preliminary irradiated crystals is due to non-radiative decay of electron excitations near radiation-induced defects. It was shown that increase of impurity concentration leads to rate growth of accumulation of radiation induced defects. (A.A.D.) 15 refs. 4 figs.}
place = {Uzbekistan}
year = {1992}
month = {Jan}
}