Characterisation of three high-energy photon and fast neutron reference radiation fields.
Three reference radiation fields for the purpose of radiation protection were characterised: (1) radiation field R-F, consisting of photons in the energy range of about 6 and 7 MeV and a small neutron contamination; (2) radiation field R-C, consisting of photons with energies of about 4.4 MeV and neutrons with energies up to 2.65 MeV; (3) radiation field R-CF, consisting of photons in the energy range of about 1 and 7 MeV and neutrons with energies about 1.5 MeV. The radiation fields R-F and R-C have previously been defined in the ISO standard 4037. Their neutron components, however, have never been described accurately in the past. The new radiation field R-CF is proposed for the first time. This radiation field can, e.g., be used to calibrate tissue-equivalent proportional counters instruments for measurements at flight altitudes.
Behrens
R
R
Physikalisch-Technische Bundesanstalt, Bundesallee, Braunschweig, Germany. Rolf.Behrens@PTB.de
Röttger
S
S
D005214:Fast Neutrons; D017785:Photons; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000295:instrumentation* / Q000592:standards*; D011835:Radiation Protection / Q000295:instrumentation* / Q000592:standards*; D012015:Reference Standards