Composition Engineering of (Lu,Gd,Tb)3(Al,Ga)5O12:Ce Film/Gd3(Al,Ga)5O12:Ce Substrate Scintillators

Abstract

The paper addresses the development of composite scintillation materials providing simultaneous real-time monitoring of different types of ionizing radiation (α-, β-particles, γ-rays) in mixed fluxes of particles and quanta. The detectors are based on composite heavy oxide scintillators consisting of a thin single-crystalline film and a bulk single-crystal substrate. The film and substrate respond to certain types of ionizing particles, forming together an all-in-one composite scintillator capable of distinguishing the type of radiation through the different time characteristics of the scintillation response. Here, we report the structure, composition, and scintillation properties under different ionizing radiations of (Lu,Gd,Tb)3(Al,Ga)5O12:Ce films deposited using liquid phase epitaxy onto Gd3(Al1−xGax)5O12:Ce (GAGG:Ce) single-crystal substrates. The most promising compositions with the highest light yields and the largest differences in scintillation decay timing under irradiation with α-, β-particles, and γ-rays were selected. Such detectors are promising for environmental security purposes, medical tomography, and other radiation detection applications.

Advances of the Cubic Symmetry Crystalline Systems to Create Complex, Bright Luminescent Ceramics

“…Compositionally disordered crystalline materials with a garnet structure form a unique platform for creating luminescent materials for lighting and detecting various types of ionizing radiation [1][2][3][4][5][6][7][8][9][10][11][12]. Similarly to luminescent inorganic heterostructores [13][14][15], they form a list of the advanced materials for photonics applications.…”

Scintillation Characteristics of the Single-Crystalline Film and Composite Film-Crystal Scintillators Based on the Ce3+-Doped (Lu,Gd)3(Ga,Al)5O12 Mixed Garnets under Alpha and Beta Particles, and Gamma Ray Excitations

“…Figure 9. Scintillation decay curves of GGAG:Ce crystal substrate under various excitations by the α-and β-particles and γ-ray quanta (more details see in[66]). …”