Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10716553 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2005 | 5 Pages |
Abstract
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, 5.805 MeV were acquired. The energy resolution for these energies was better than 10 keV (1.8%). Using 241Am 5.486 MeV α-particles a charge collection efficiency (CCE) of about 94% was obtained at 570 V bias potential. The spectra of low-energy γ-rays 59.5 keV and X-rays with average energy 16.2 keV from 241Am source measured at room temperature are presented. An energy resolution of about 6.1 keV (10.3%) FWHM at 59.5 keV was obtained.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
A.J. Kordyasz, S.G. Strzelecka, J. Kownacki, L. DobrzaÅski, A. Hruban, W. OrÅowski, E. Wegner, L. Reissig,