Other
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993stin...9431709k&link_type=abstract
M.S. Thesis Royal Military Coll. of Canada, Kingston (Ontario).
Other
Flight Altitude, Flight Crews, Galactic Cosmic Rays, Neutron Counters, Neutrons, Radiation Dosage, Radiation Measurement, Neutron Spectra, Passenger Aircraft, Radiation Effects
Scientific paper
To provide more complete information of the neutron component of the galactic cosmic ray field at aircraft altitudes, an investigation was conducted in which a group of Air Canada and Air France pilots routinely carried neutron bubble detectors on their normal flight duties for a period of about one year. Each pilot carried one dosimeter, activating it on takeoff and resetting it on landing. A data base of over 600 flights was obtained. This work yielded measurements of the fast neutron flux of 1.436 to 2.259 neutrons per square cm per second (ncms) for the Air Canada and 2.033 to 2.909 ncms for the Air France flights. In addition, the pilots typically experienced an annual total dose equivalent (including neutrons and gamma rays) of 3.1 to 3.9 millisieverts per year. These results are found to be in agreement with other experimental and theoretical work. Consequently, the total dose equivalent experienced by the air crew is clearly above the new recommended dose limit of one millisievert per year for the general public, which would classify the flight crews in the same category as an atomic radiation worker.
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