Abstract
During recent commercial Trans-Pacific passenger flights between Sydney and several major cities in the USA, the neutron and gamma dose equivalents in the aircraft cabin were evaluated with superheated Bubble dosimeters, thermoluminescence dosimeter chips (TLD-600 and TLD-700) and a miniature electronic dosimeter. After a total 73-hour flight time the accumulated neutron and gamma dose equivalents were evaluated to be 39.7 μSv and 74.0 μSv respectively. The thermoluminescence (TL) glow curves of the dosimeter chips were assayed at a ramp heating rate of 10°C s −1 up to 400°C. By using the Bubble and electronic dosimeter data it was possible to isolate explicitly the neutron and gamma dose components from the deconvoluted TL-glow curve of the TLD-600 chips. The application of Bubble dosimeter and TLD for an accurate estimation of the radiation exposure to air crews and frequent flying passengers is suggested.
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