Abstract
We present new results on the neutron detection efficiency of detection systems based on He-3 proportional counters compared to organic liquid scintillators. The experiments were conducted using a well-characterized Cf-252 neutron source, measured bare, and shielded with slabs of polyethylene. The results show that the intrinsic neutron detection efficiency for the bare source is approximately 25% for the He-3 system, and 67% for the liquid scintillator system. When polyethylene sheets were used to shield the source in 2.54 cm increments, the neutron detection efficiency of both systems decreased exponentially to approximately 10% for the case of 25.4 cm. Experimental results were simulated using MCNPX-PoliMi and good agreement was found between measurement and simulation results for all the cases considered here.
Original language | English (US) |
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Pages (from-to) | 107-112 |
Number of pages | 6 |
Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
Volume | 929 |
DOIs | |
State | Published - Jun 11 2019 |
Externally published | Yes |
Keywords
- Detector characterization
- Efficiency
- He-3
- Neutron detection
- Organic scintillator
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation