Naslov
Cosmic radiation dose in aircraft - a neutron track etch detector

Autori
Vuković, Branko ; Radolić, Vanja ; Miklavčić, Igor ; Poje, Marina ; Varga, Maja ; Planinić, Josip

Izvornik
Journal of Environmental Radioactivity (0265-931X) 98 (2007), 3; 264-273

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Cosmic radiation; Aircrew; Flight level; Neutron track etch detector; Dose rate

Sažetak
Cosmic radiation bombards us at high altitude by ionizing particles. The radiation environment is a complex mixture of charged particles of solar and galactic origin, as well as of secondary particles produced in interaction of the galactic cosmic particles with the nuclei of atmosphere of the Earth. The radiation field at aircraft altitude consists of different types of particles, mainly photons, electrons, positrons and neutrons, with a large energy range. The non-neutron component of cosmic radiation dose aboard ATR 42 and A 320 aircraft (flight level of 8 and 11 km, respectively) was measured with TLD-100 (LiF:Mg, Ti) detectors and the Mini 6100 semiconductor dosimeter. The estimated occupational effective dose for the aircraft crew (A320) working 500 h per year was 1.64 mSv. Other experiments, or dose rate measurements with the neutron dosimeter, consisting of LR-115 track detector and boron foil BN-1 or 10B converter, were performed on five intercontinental flights. Comparison the dose rates of the non-neutron component (low LET) and the neutron one (high LET) of the radiation field at the aircraft flight level, showed that the neutron component carried about 50% of the total dose. The dose rate measurements on the flights from the Middle Europe to the South and Middle America, then to Korea and Japan, showed that the flights over or near the equator region carried less dose rate ; this was in accordance with the known geomagnetic latitude effect.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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