Low-level gamma and neutron monitoring based on use of proportional counter filled with 3He in polythene moderator: study of the responses to gamma and neutrons.
It has been shown that a proportional counter filled with (3)He placed centrally inside a polythene sphere opens a new possibility for measuring gamma photons and neutrons in the separate pulse-height windows. The responses to gamma and neutrons (in terms of ambient dose equivalent) of the detector assembly consisting of 203-mm polythene sphere with centrally positioned 40-mm diameter (3)He proportional counter have been studied. The response to secondary gammas from capture process in hydrogen has also been studied. The rather preliminary studies indicate that the proposed measuring system has very promising features as an ambient dose equivalent device for mixed gamma-neutron fields.
National Centre for Nuclear Studies, Otwock 05-400, Poland stanislaw.pszona@ncbj.gov.pl.
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S
Pszona
National Centre for Nuclear Studies, Otwock 05-400, Poland.
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A
Bantsar
National Centre for Nuclear Studies, Otwock 05-400, Poland.
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P
Tulik
National Centre for Nuclear Studies, Otwock 05-400, Poland.
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K
Wincel
National Centre for Nuclear Studies, Otwock 05-400, Poland.
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B
Zaręba
D004867:Equipment Design; D005720:Gamma Rays; D006371:Helium / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry; D007554:Isotopes; D009502:Neutrons; D017785:Photons; D020959:Polyethylene / Q000737:chemistry*; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results
D007554:Isotopes; D006371:Helium; D006859:Hydrogen; D020959:Polyethylene