Detection of gamma rays using a coupled array of high-purity germanium detectors
| Autor: | M. Kesselman, M.D. D'Agostino, T.W. Debiak, E. J. Schneid, B.W. Hughlock, R.M. Misita, S.J. Bocskor |
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| Rok vydání: | 1990 |
| Předmět: |
Physics
Nuclear and High Energy Physics business.industry Monte Carlo method Detector Gamma ray chemistry.chemical_element Germanium Particle detector Full width at half maximum Optics Data acquisition Nuclear Energy and Engineering chemistry Measuring instrument Electrical and Electronic Engineering business |
| Zdroj: | IEEE Transactions on Nuclear Science. 37:2203-2207 |
| ISSN: | 1558-1578 0018-9499 |
| DOI: | 10.1109/tns.1990.574215 |
| Popis: | The characteristics of a seven-element hexagonal close-packed array of high-purity germanium detectors were measured. The energy resolution or full width at half maximum (FWHM) and full width at 10% maximum (FW.1M) were measured in both the uncoupled mode and the sum-coincidence mode between 333 keV and 2.612 MeV. The fractional peak efficiency improvement obtained in sum-coincidence mode compared with the uncoupled mode increased from 0% at 80 keV to 19.7% at 2.612 MeV. A Monte Carlo code developed to compare these results with theoretical models shows substantial agreement with experiments from 80 keV to 1.332 MeV. A description of the detector, signal processing electronics, data acquisition system, and software is given. A technique based on real-time compensation of gain and offset drift is developed to minimize the peak broadening in real-time sum-coincidence spectra. This technique allows data acquisition to commence shortly after turn-on while the system approaches temperature stabilization. > |
| Databáze: | OpenAIRE |
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