An apparatus for studying scintillator properties at high isostatic pressures
Abbreviated Journal Title
Rev. Sci. Instrum.
TRAPPED EXCITON LUMINESCENCE; ELECTRONIC BAND-STRUCTURES; HYDROSTATIC-PRESSURE; NON-PROPORTIONALITY; ENERGY RESOLUTION; UNIAXIAL-STRESS; TEMPERATURE; NONPROPORTIONALITY; NAI(TL); BGO; Instruments & Instrumentation; Physics, Applied
We describe the design and operation of a unique hydraulic press for the study of scintillator materials under isostatic pressure. This press, capable of developing a pressure of a gigapascal, consists of a large sample chamber pressurized by a two-stage hydraulic amplifier. The optical detection of the scintillation light emitted by the sample is performed, through a large aperture optical port, by a photodetector located outside the pressure vessel. In addition to providing essential pressure-dependent studies on the emission characteristics of radioluminescent materials, this apparatus is being developed to elucidate the mechanisms behind the recently observed dependency of light-yield nonproportionality on electronic band structure. The variation of the light output of a Tl:CsI crystal under 511-keV gamma excitation and hydrostatic pressure is given as an example. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4773563]
Review of Scientific Instruments
"An apparatus for studying scintillator properties at high isostatic pressures" (2013). Faculty Bibliography 2010s. 4007.