Fast Neutron Detection with a Segmented Spectrometer
| Autor: | Jeffrey S. Nico, Craig Heimbach, Dylan Erwin, H. Breuer, E. J. Beise, T. J. Langford, C.D. Bass |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Nuclear and High Energy Physics Physics - Instrumentation and Detectors Spectrometer business.industry Physics::Instrumentation and Detectors Astrophysics::High Energy Astrophysical Phenomena Neutron stimulated emission computed tomography Monte Carlo method Nuclear Theory FOS: Physical sciences Instrumentation and Detectors (physics.ins-det) Scintillator 7. Clean energy Nuclear physics Optics Neutron flux Neutron probe Neutron detection Neutron Nuclear Experiment (nucl-ex) business Nuclear Experiment Instrumentation |
| Popis: | A fast neutron spectrometer consisting of segmented plastic scintillator and He-3 proportional counters was constructed for the measurement of neutrons in the energy range 1 MeV to 200 MeV. We discuss its design, principles of operation, and the method of analysis. The detector is capable of observing very low neutron fluxes in the presence of ambient gamma background and does not require scintillator pulseshape discrimination. The spectrometer was characterized for its energy response in fast neutron fields of 2.5 MeV and 14 MeV, and the results are compared with Monte Carlo simulations. Measurements of the fast neutron flux and energy response at 120 m above sea-level (39.130 deg. N, 77.218 deg. W) and at a depth of 560 m in a limestone mine are presented. Finally, the design of a spectrometer with improved sensitivity and energy resolution is discussed. 15 pages, 9 figures, published in NIM A |
| Databáze: | OpenAIRE |
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