dorsal/arxiv
View SchemaEvents registration in a fast neutrons spectrometer
| Authors | J. N. Abdurashitov, V. N. Gavrin, A. V. Kalikhov, A. A. Shikhin, V. E. Yants, O. S. Zaborsky |
|---|---|
| Categories | |
| ArXiv ID | physics/9908035 |
| URL | https://arxiv.org/abs/physics/9908035 |
Abstract
The principle of operation, design, registration system and main characteristics of a fast neutrons spectrometer are described. The spectrometer is intended for direct measurements of ultra low fluxes of fast neutrons. It is sensitive to neutron fluxes of 10^-7 neutrons/(cm^2 s^1) and lower with the neutron energy above 700 keV. The detection efficiency of fast neutrons with simultaneous energy measurement is within 0.02-0.06. The neutron spectrometer was designed taking into account requirements for minimizing the gamma-ray background. It is a calorimeter based on a pure liquid organic scintillator-thermalizer with helium proportional counters as capturers of thermalized neutrons distributed uniformly over the volume. Low-level signal electronics for the spectrometer were designed with signal-to-noise ratio optimization and full pulse shape analysis required for efficient rejection of background events. A data acquisition and processing system is based on fast (100 MHz) two-channel PC/AT interfaced digital oscilloscope. The acquisition software was written in the C programming language.
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"date_modified": "2026-03-02T18:01:24.822000Z",
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"abstract": "The principle of operation, design, registration system and main\ncharacteristics of a fast neutrons spectrometer are described. The spectrometer\nis intended for direct measurements of ultra low fluxes of fast neutrons. It is\nsensitive to neutron fluxes of 10^-7 neutrons/(cm^2 s^1) and lower with the\nneutron energy above 700 keV. The detection efficiency of fast neutrons with\nsimultaneous energy measurement is within 0.02-0.06. The neutron spectrometer\nwas designed taking into account requirements for minimizing the gamma-ray\nbackground. It is a calorimeter based on a pure liquid organic\nscintillator-thermalizer with helium proportional counters as capturers of\nthermalized neutrons distributed uniformly over the volume. Low-level signal\nelectronics for the spectrometer were designed with signal-to-noise ratio\noptimization and full pulse shape analysis required for efficient rejection of\nbackground events. A data acquisition and processing system is based on fast\n(100 MHz) two-channel PC/AT interfaced digital oscilloscope. The acquisition\nsoftware was written in the C programming language.",
"arxiv_id": "physics/9908035",
"authors": [
"J. N. Abdurashitov",
"V. N. Gavrin",
"A. V. Kalikhov",
"A. A. Shikhin",
"V. E. Yants",
"O. S. Zaborsky"
],
"categories": [
"physics.ins-det",
"astro-ph",
"nucl-ex"
],
"title": "Events registration in a fast neutrons spectrometer",
"url": "https://arxiv.org/abs/physics/9908035"
},
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