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Radiation Protection Dosimetry Advance Access originally published online on May 23, 2007
Radiation Protection Dosimetry 2007 126(1-4):350-354; doi:10.1093/rpd/ncm073
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© The Author 2007. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Modification of ROSPEC to cover neutrons from thermal to 18 MeV

H. Ing*, S. Djeffal, T. Clifford, L. Li, R. Noulty and R. Machrafi

Bubble Technology Industries Inc., Chalk River, Ontario, Canada

* Corresponding author: ingh{at}bubbletech.ca

Rotating Spectrometer (ROSPEC) is a neutron spectrometer designed to measure neutron energy distributions, and provide accurate neutron dosimetry. It is a completely self-contained unit and measures neutron energy via recoiling protons in gas proportional counters. Each of the four original gas counters is dedicated to a particular neutron energy range dictated by sensitivity to gamma rays at the low energy end of the spectrum and by proton collisions with the counter walls at the high energy end. Introduced originally in 1992, ROSPEC has a proven operational record with a program of continued upgrades. The operating range of the original ROSPEC spans 50 keV–4.5 MeV. The range of the ROSPEC has now been extended down to include epithermal and thermal neutrons by adding two 2 in. 3He counters. Also, an optional simple scintillation spectrometer was designed to extend the upper limit of ROSPEC up to 18 MeV.


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