Advantages and Problems of Nanocrystalline Scintillators

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作者：

NV Klassen，VV Kedrov，VN Kurlov，YA Ossipyan，SZ Shmurak，Shmyt'ko, I. M.，GK Strukova，NP Kobelev，EA Kudrenko，OA Krivko

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摘要：

Our experiments with nanocrystalline scintillating rare earth oxides and rare earth fluorides have shown that in some cases nanoscopic dimensions provide essential improvement of the most important scintillation parameters: light yield, kinetics of scintillations, radiation hardness, etc. We found that in the range from 20 to 100-nm of the oxide and fluoride particles there are 3 types of layered structures: with expanded exterior layer, with changed phase structure, and with changed chemical composition. These layered structures can strongly influence scintillation parameters: cause an increase or decrease in the light yield, vary scintillation kinetics, modify radiation hardness, etc. Control of dimensions and structures of nanoscintillators can be used for significant modifications of parameters of radiation detectors (radical acceleration of kinetics, enhancement of light yield, increase in radiation hardness, etc.). Radiation detectors based on nanoscintillators have promising prospects for applications in new generations of devices for medical diagnostics, security inspection, radiation monitoring of nuclear reactors.

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关键词：

Practical, Experimental/ nanostructured materials nanotechnology radiation hardening radiation monitoring scintillation solid scintillation detectors/ nanocrystalline scintillators rare earth oxides rare earth fluorides scintillations radiation hardness chemical composition radiation detectors radical acceleration medical diagnostics security inspection radiation monitoring nuclear reactors size 20 nm to 100 nm/ A2940M Scintillation detectors scintillators and photomultipliers A7860 Other luminescence spectra and radiative recombination (condensed matter) A6180 Radiation damage and other irradiation effects A2880F Radiation monitoring and radiation protection in nuclear engineering A6146 Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials B7420 Particle and radiation detection and measurement/ size 2.0E-08 to 1.0E-07 m