Structure and Properties of Quartz Crystals Grown on Neutron-Irradiated Seeds

Abstract

АННОТАЦИЯ В статье приводятся результаты исследований спектров электронно-парамагнитного резонанса (ЭПР) и люминесценции кристаллов кварца. Показано что в кристаллах кварца, выращенных на нейтронно-облученных затравках, наследуется наросшим слоем радиационно-наведенная β-фаза и структурные дефекты затравки. ABSTRACT The article presents the results of studies of the EPR spectra and luminescence of quartz crystals. It has been shown that in quartz crystals grown on neutron-irradiated seeds, the radiation-induced β-phase and the structural defects of the seeds are inherited by an overgrown layer.

Study of the luminescence of SiO2 crystals

“…Comparison of the obtained results of TL studies of quartz crystals grown on neutron-irradiated seeds with the results of [3] shows that the luminescence bands at 520, 450 and 550 nm are characteristic of both irradiated and grown on neutron-irradiated seeds crystals. But here it should also be noted that in the TL spectra of quartz crystals grown on neutron-irradiated seeds, the indicated luminescence bands appear at slightly higher radiation doses than in irradiated ones.…”

“…With an increase in the irradiation dose of the seeds, new overlapping bands appear with maxima at 460 and 550 nm. In [3], a 520-nm band was found in the GL spectrum of a quartz crystal neutron-irradiated with a dose of 10 17 N/cm 2 . Its intensity increases with the dose up to 10 19 N/cm 2 .…”

“…Investigated TE curves of neutron-irradiated quartz crystals in [3] show that low-temperature TE peaks decrease and high-temperature peaks appear in the region of 320-600 K, the intensity of which increases with increasing dose.…”

“…At a dose of ~ 2x1020 N/cm2, only the 460 nm band is observed. According to [3,4], the GL bands at 550 and 460 nm in neutronirradiated quartz crystals are associated with the βand metamict phases of quartz, respectively. The studied GL bands 520, 550, 460 nm of neutron-irradiated quartz crystals are also found, as noted above, in neutron-irradiated seeds.…”

“…In [1,2], the study of the structure of quartz crystals grown on neutron-irradiated seeds with a dose of 5x10 18 , 10 19 and 5x10 19 N/cm 2 , using X-ray diffraction and spectral analysis, showed for the first time the possibility of the transition of the radiation-induced high-temperature β-phase of quartz into the overgrown layer and an increase in its volume proportions with an increase in the dose of irradiation of seeds.…”