Radiation Protection Dosimetry Advance Access originally published online on May 12, 2006
Radiation Protection Dosimetry 2006 121(4):347-357; doi:10.1093/rpd/ncl053
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Long-term measurements of
*(10) at aviation altitudes in the northern hemisphere
Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany
* Corresponding author: Frank.Wissmann{at}ptb.de
Received September 30, 2005, amended January 24, 2006, accepted April 5, 2006
| Abstract |
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Monitoring the radiation field at aviation altitudes is achieved by the dosemeter system
DOS installed in a passenger aircraft. The basic detector is a 2 in. tissue-equivalent proportional counter (TEPC) mounted in a cabin-baggage-sized aluminium suitcase. The entire system was characterised in neutron and photon reference fields from which two calibration factors were determined according to the splitting of the measured dose deposition spectrum yd(y) into low-LET and high-LET regions. A total of 255 flights in the northern hemisphere was analysed. The dependencies of the ambient dose equivalent rates on altitude, latitude and solar activity have been determined. These new data extend the data base used in Germany for the validation of program codes to calculate the radiation exposure of air crew members.
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