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Radiation Protection Dosimetry Advance Access originally published online on June 14, 2007
Radiation Protection Dosimetry 2007 126(1-4):174-177; doi:10.1093/rpd/ncm037
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© The Author 2007. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Calculation of energy distributions of charged particles produced by neutrons from 0.14 to 65 MeV in tissue substitutes

S. Tsuda*, Y. Nakane and Y. Yamaguchi

Japan Atomic Energy Agency (JAEA), Shirakata-Shirane 2-4, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan

* Corresponding author: tsuda.shuichi{at}jaea.go.jp

Energy distributions of secondary charged particles were calculated in tissue substitutes irradiated by neutrons from 0.14 to 65 MeV, using the Particle and Heavy Ion Transport code System. The calculations were compared with experimental data measured by tissue equivalent proportional counters (TEPC). It is found that the calculated distributions of the lineal energy, y, generally agree well with the measured ones for neutrons from several 100 keV to 15 MeV. In the case of 40 and 65 MeV neutron irradiations, wall effects of TEPC should be considered and the fluence of alphas is underestimated by the calculations. Integrated dose contributions of the secondary charged particles are generally in good agreement with those of the measured ones.


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