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Radiation Protection Dosimetry 2004 110(1-4):297-300; doi:10.1093/rpd/nch169
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Radiation Protection Dosimetry Vol. 110 Nos. 1-4 © Oxford University Press 2004; all rights reserved

Performance of a cylindrical tissue-equivalent proportional counter for use in neutron monitoring

Q. Chau*, T. Lahaye, S. Ménard, L. Donadille, T. Bolognese and A. Rannou

Institute for Radiological Protection and Nuclear Safety, BP.17-92262 Fontenay-aux-Roses, France

* Corresponding author: quang.chau{at}irsn.fr

Tissue-equivalent proportional counters (TEPC) allow the measurements of the absorbed dose and the ambient dose equivalent for neutron fields. A device based on this approach, called NAUSICAA(1,2), has already been developed by IRSN to be used in high energy neutron fields for space applications. The response of this detector underestimates significantly the dose equivalent at low energies (several hundred keV) which represent the major component of neutron fields at workplaces in the nuclear industry. A counter with a similar geometry (cylindrical detector) and a lower gas pressure was studied in order to simulate a 1 µm biological site. In 2003, the performance of the device was further improved by adding a small amount of 3He to the tissue-equivalent gas (propane based) in order to increase the response for the lower energies of neutrons. Three amplification circuits were used to cover lineal energy range from 10–1 to 104 keV µm–1. Tests were performed in monoenergetic neutron and source fields. This paper presents the experimental results obtained with this change.


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Q. Chau and S. Menard
A tissue equivalent proportional counter filled with a mixture of tissue equivalent gas and 3He for neutron monitoring
Radiat Prot Dosimetry, December 1, 2006; 122(1-4): 390 - 392.
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