Single-crystalline oxide films of the Al 2 O 3 -Y 2 O 3 -R 2 O 3 system as optical sensors of various types of ionizing radiation: significant advantages over volume analogs

Abstract

This investigation is dedicated to studying of peculiarities of luminescent properties of the single crystalline films (SCF) of Al<SUB>2</SUB>O<SUB>3</SUB>-Y<SUB>2</SUB>O<SUB>3</SUB>-R<SUB>2</SUB>O<SUB>3</SUB> oxide system with alpha-Al<SUB>2</SUB>O<SUB>3</SUB> and garnet structure, which are used as various types of ionizing radiation luminescent detectors. These peculiarities define the number of nontrivial advantages over their volume analogues. It is shown that SCF are characterized by the low concentrations of vacancy type defects and substituent defects, and the high concentration of Pb ion as dopant. This allows us to substantially increase the spatial resolution and selectivity of cathodoluminophores on the base of these compounds.