Nonproportionality in the scintillation light yield of bismuth germanate
Autor: | Thomas R. Gentile, Kevin J. Coakley, H. Breuer, Jeffrey S. Nico, Matthew J. Bales, Robert Cooper, Timothy Chupp, B. O׳Neill |
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Rok vydání: | 2015 |
Předmět: |
Nuclear and High Energy Physics
Physics - Instrumentation and Detectors APDS Physics::Instrumentation and Detectors Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences chemistry.chemical_element Bismuth germanate law.invention Bismuth Nuclear physics chemistry.chemical_compound Optics law Radiative transfer Neutron Nuclear Experiment (nucl-ex) Nuclear Experiment Instrumentation Physics Scintillation business.industry Gamma ray Instrumentation and Detectors (physics.ins-det) Avalanche photodiode chemistry business |
Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 784:88-92 |
ISSN: | 0168-9002 |
DOI: | 10.1016/j.nima.2014.11.002 |
Popis: | We present measurements of nonproportionality in the scintillation light yield of bismuth germanate (BGO) for gamma-rays with energies between 6 keV and 662 keV. The scintillation light was read out by avalanche photodiodes (APDs) with both the BGO crystals and APDs operated at a temperature of approximately 90 K. Data were obtained using radioisotope sources to illuminate both a single BGO crystal in a small test cryostat and a 12-element detector in a neutron radiative beta-decay experiment. In addition one datum was obtained in a 4.6 T magnetic field based on the bismuth K x-ray escape peak produced by a continuum of background gamma rays in this apparatus. These measurements and comparison to prior results were motivated by an experiment to study the radiative decay mode of the free neutron. The combination of data taken under different conditions yields a reasonably consistent picture for BGO nonproportionality that should be useful for researchers employing BGO detectors at low gamma ray energies. 8 pages, 4 figures |
Databáze: | OpenAIRE |
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