Response of semi-insulating 100μm thick GaAs detector for α-particles, γ-rays and X-rays
Creators
- 1. Heavy Ion Laboratory, Warsaw University, ul. Pasteura 5a, 02-093 Warsaw (Poland)
- 2. Institute of Electronic Materials Technology, Warsaw (Poland)
- 3. Center for Inter-Faculty Individual Studies in Mathematical and Natural Sciences, University of Warsaw, Warsaw (Poland)
Description
The 100μm thick, transmission, fully depleted GaAs Schottky barrier detector fabricated from LEC bulk GaAs crystals has been tested. The basic structure of the detector consists of a Cr/Au Schottky contact and an Au/Ge/Ni/Au alloyed ohmic contact. Pulse height spectra for α-particles resulting from irradiation with triple source 239Pu, 241Am, 244Cm, with energies 5.155, 5.486, 5.805MeV were acquired. The energy resolution for these energies was better than 10keV (1.8%). Using 241Am 5.486MeV α-particles a charge collection efficiency (CCE) of about 94% was obtained at 570V bias potential. The spectra of low-energy γ-rays 59.5keV and X-rays with average energy 16.2keV from 241Am source measured at room temperature are presented. An energy resolution of about 6.1keV (10.3%) FWHM at 59.5keV was obtained
Additional details
Identifiers
- DOI
- 10.1016/j.nima.2005.02.015;
- PII
- S0168-9002(05)00757-6;
Publishing Information
- Journal Title
- Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
- Journal Volume
- 545
- Journal Issue
- 3
- Journal Page Range
- p. 716-720
- ISSN
- 0168-9002
- CODEN
- NIMAER
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37036681
- Subject category
- S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
- Descriptors DEI
- ALPHA PARTICLES; AMERICIUM 241; CHARGE COLLECTION; CRYSTALS; CURIUM 244; EFFICIENCY; ENERGY RESOLUTION; GALLIUM ARSENIDES; GAMMA RADIATION; GAMMA SPECTRA; IRRADIATION; PLUTONIUM 239; PULSES; RADIATION DETECTORS; SPECTROSCOPY; TEMPERATURE RANGE 0273-0400 K; TRANSMISSION; X RADIATION
- Descriptors DEC
- ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; AMERICIUM ISOTOPES; ARSENIC COMPOUNDS; ARSENIDES; CHARGED PARTICLES; CURIUM ISOTOPES; ELECTROMAGNETIC RADIATION; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; GALLIUM COMPOUNDS; HEAVY NUCLEI; IONIZING RADIATIONS; ISOTOPES; MEASURING INSTRUMENTS; NUCLEI; ODD-EVEN NUCLEI; PLUTONIUM ISOTOPES; PNICTIDES; RADIATIONS; RADIOISOTOPES; RESOLUTION; SPECTRA; SPONTANEOUS FISSION RADIOISOTOPES; TEMPERATURE RANGE; YEARS LIVING RADIOISOTOPES
Optional Information
- Copyright
- Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.