Authors

R. M. Gaume; S. Lam; M. Gascon; W. Setyawan; S. Curtarolo;R. S. Feigelson

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Abbreviated Journal Title

Rev. Sci. Instrum.

Keywords

TRAPPED EXCITON LUMINESCENCE; ELECTRONIC BAND-STRUCTURES; HYDROSTATIC-PRESSURE; NON-PROPORTIONALITY; ENERGY RESOLUTION; UNIAXIAL-STRESS; TEMPERATURE; NONPROPORTIONALITY; NAI(TL); BGO; Instruments & Instrumentation; Physics, Applied

Abstract

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.

Journal Title

Review of Scientific Instruments

Volume

84

Issue/Number

1

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

6

WOS Identifier

WOS:000314729100068

ISSN

0034-6748

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