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- Title
A MULTI-ELEMENT THICK GAS ELECTRON MULTIPLIERBASED MICRODOSEMETER FOR MEASUREMENT OF NEUTRONS DOSE-EQUIVALENT: A MONTE CARLO STUDY.
- Authors
Moslehi, A.; Raisali, G.
- Abstract
To determine the dose-equivalent of neutrons in an extended energy range, in the present work a multi-element thick gas electron multiplier-based microdosemeter made of PMMA (Perspex) walls of 10 mm in thickness is designed. Each cavity is filled with the propane-based tissue-equivalent (TE) gas simulating 1 μm of tissue. Also, a few weight fractions of ³He are assumed to be added to the TE gas. The dose-equivalents are determined for 11 neutron energies between thermal and 14 MeV using the lineal energy distributions calculated by Geant4 simulation toolkit and also the lineal energy-based quality factors. The results show that by adding 0.04% of ³He to the TE gas in each cavity, an energy-independent dose-equivalent response within 30% uncertainty around a median value of 0.91 in the above energy range is achieved. It is concluded that after its construction, the studied microdosemeter can be used to measure the dose-equivalent of neutrons, favorably.
- Subjects
RADIATION doses; NEUTRON measurement; IONIZING radiation; MICRODOSIMETRY; PHYSIOLOGICAL effects of neutrons
- Publication
Radiation Protection Dosimetry, 2017, Vol 176, Issue 4, p404
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/ncx024