Abstract
This paper describes preliminary work to develop a cosmic-radiation dosemeterfor use by military aircraft crew. The dosemeter is based on a combination ofCR-39 etched-track detectors and TLD-700 thermoluminescent detectors. It isintended that the CR-39 be used to assess the neutron dose, while the TLD-700is used to assess the photon and charged particle dose. The sensitivity ofCR-39 to the neutron component of cosmic radiation was estimated byirradiating samples of the plastic at the CERN-CEC High Energy Reference FieldFacility. This facility produced a radiation field with a neutron spectrumresembling that of the neutron component of cosmic radiation at typicalairflight altitudes. The response of the CR-39 was linear over the range ofdoses studied (0.2-6.0 mSv) and there was no significant fading in the6-month period after irradiation. The TLD-700 component of the dosemeter wascalibrated using 137Cs gamma rays. The response of the TLD-700 was linearover the range of doses studied (0.01-5.0 mSv) with no significantfading in the 6-month period after irradiation. It was concluded that acombination of CR-39 and TLD-700 detectors would provide an effectivecosmic-radiation dosemeter for use by military aircraft crew.
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