Practical implications of neutron survey instrument performance

Richard Tanner*, D. T. Bartlett, I. G. Hager, I. N. Jones, C. Molinos, N. J. Roberts, G. C. Taylor, D. J. Thomas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Improvements have been made to the Monte Carlo modelling used to calculate the response of the neutron survey instruments most commonly used in the UK, for neutron energies up to 20 MeV. The improved modelling of the devices includes the electronics and battery pack, allowing better calculations of both the energy and angle dependence of response. These data are used to calculate the response of the instruments in rotationally and fully isotropic, as well as unidirectional fields. Experimental measurements with radionuclide sources and monoenergetic neutron fields have been, and continue to be made, to test the calculated response characteristics. The enhancements to the calculations have involved simulation of the sensitivity of the response to variations in instrument manufacture, and will include the influence of the user and floor during measurements. The practical implications of the energy and angle dependence of response, variations in manufacture, and the influence of the user are assessed by folding the response characteristics with workplace energy and direction distributions.

Original languageEnglish
Pages (from-to)763-767
Number of pages5
JournalRadiation Protection Dosimetry
Issue number1-4
Publication statusPublished - 2004

Bibliographical note

Funding Information:
The authors would like to thank the manufacturers of the instruments and their components, Saint-Gobain Crystals & Detectors UK Ltd, Centronic Ltd, LND Inc, Studsvik Instrument AB and Camberley Rubber Mouldings Ltd for their willingness to help with a number of queries about the instruments and, particularly, for providing full details of the instruments' construction, thereby allowing computer models to be created. The project for which results have been reported is fully funded by the UK Department of Trade and Industry under contract PN 1101.


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