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Personnel neutron dosimeters using a number of different techniques have been developed for routine use in neutron fields, but all of these dosimeters must be carefully corrected to account for the fact that their response is critically dependent upon the energy distribution of the neutron field. At present, personnel neutron dosimeters are typically calibrated in a standard neutron field (e.g., 252Cf or D2O-moderated 252Cf)- but may then be applied in neutron fields that vary considerably from the calibration field. Some widely used personnel dosimeters, such as TLD-albedo dosimeters, overrespond to low energy neutrons and therefore deliver high readings in fields that are more moderated than the standard field.
The solution to the problems created by this energy dependence of the calibration of personnel neutron dosimeters is to obtain accurate experimental information on the neutron energy spectra in the fields to which the personnel dosimeters will be exposed. This paper discusses an effective and accurate means to obtain this information by the application of solid-state track recorder neutron area monitors.
neutron, dosimetry, personnel, tracks, energy spectrum
Fellow Scientist, Westinghouse Research and Development Center, Pittsburgh, PA