Radiation effects on optical and structural properties of GG17 Glasses induced by 170 keV electrons and protons

Abstract

The effects of 170 keV electron and proton irradiation are investigated on the optical property and the structure of GG17-type borosilicate glasses for the purpose of assessing the suitability of this material for the rubidium lamp envelope, based on GEANT4 simulating calculation, using electron paramagnetic resonance and Fourier transform infrared spectra and optical-transmittance measurements. The Micro-mechanisms on damage of GG17 Glasses are clarified for electron and proton, respectively. For the electron with the energy of 170 keV, defect creation is due to ionization energy losses and the center is mainly boron oxygen hole center (BOHC) formed by one hole trapped on a bridge oxygen structure with [BO4]−. As a result the number of BOHCs grows as the electron fluence increases. However, for the proton with the energy of 170 keV, the creation of structural defects dominates by means of debonding as a result of an atom having been kicked off the structural chain (displacement effect). This leads to the intensive generation of silicon oxygen hole centers, as well as BOHCs, by the holes trapped on non-bridge oxygen.

Radiation Testing of Optical and Semiconductor Components for Radiation-Tolerant LED Luminaires

“…2a) until the UV cut-off edge at 335 nm [13], [14]. Upon increasing dose, two strong absorption bands located near 330 nm and 475 nm appear; these bands have been previously attributed to boron oxygen hole centres [15] (each centre is given by a hole trapped on a bridge oxygen structure with [BO 4 ] − ). The large increase of absorption in the UV-blue portion of the spectrum leads to the darkening of BS samples (see Fig.…”

Features of the influence of space factors on the changes in the optical properties of thermoregulating coatings of the «solar reflector» class

“…Взаимодействие потоков заряженных частиц с диэлектрическими материалами, например, с защитными стеклами солнечных батарей и ТРП КА типа К-208СР сопровождается электростатическими разрядами [10,12,13,27,22,23] вызывающими помехи и сбои бортовой аппаратуры. При разрядах также происходит деструкция материала, изменяется его стехиометрия и повышается химическая активность приповерхностного слоя, что способствует загрязнению поверхности покрытия продуктами собственной внешней атмосферы (СВА) КА [28].…”

Effect of γ-ray irradiation on optical properties of erbium doped bismuth-tellurite glasses

“…In recent years, there is an enormous research interest on gamma irradiated various types of glasses due to their prominent applications in space, nuclear power, windows, TV camera objectives and other radiation shielding materials [1]. High energy ionizing radiations such as X-rays, γ-rays, electron, proton, neutron, heavy ions and UV radiations are capable of inducing electronic as well as rearrangement damage in solids and particularly can produce various types of defects in glasses [2]. Phenomenal development in the gamma irradiation on glasses is defects induced by irradiation can cause strong absorption extending from the ultraviolet to the visible region.…”