Journal Article

Shielding experiment of heavy-ion produced neutrons using a tissue-equivalent proportional counter

T. Nunomiya, S. Yonai, M. Takada, A. Fukumura and T. Nakamura

in Radiation Protection Dosimetry

Volume 106, issue 3, pages 207-218
Published in print September 2003 | ISSN: 0144-8420
Published online September 2003 | e-ISSN: 1742-3406 | DOI: http://dx.doi.org/10.1093/oxfordjournals.rpd.a006351
Shielding experiment of heavy-ion produced neutrons using a tissue-equivalent proportional counter

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A shielding experiment was performed at the HIMAC (Heavy Ion Medical Accelerator in Chiba), of National Institute of Radiological Sciences (NIRS), to measure neutron dose using a spherical TEPC (tissue-equivalent proportional counter) of 12.55 cm inner diameter. Neutrons are produced from a 5 cm thick stopping length Cu target bombarded by 400 MeV/nucleon C6+ ions and penetrate concrete or iron shields of various thickness at 0 degree to the beam direction. From this shielding experiment, y-distribution, mean lineal energy, absorbed dose, dose equivalent and mean-quality factor were obtained behind the shield as a function of shield thickness. The neutron dose attenuation lengths were also obtained as 126 g cm-2 for concrete and 211 g cm-2 for iron. The measured results were compared with the calculated results using the MARS Monte Carlo code.

Journal Article.  0 words. 

Subjects: Nuclear Chemistry, Photochemistry, and Radiation

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