Quality factor, effective
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The Radiological Protection Ordinance of 1989 uses
the quality factor Q or the effective quality factor Qeff instead of the radiation
weighting factor. The effective quality factor considers the probability
of stochastic radiation effects, depending on the respective radiation
type. The values of the effective quality factor Q eff depend
on the exposure conditions and the type and energy of incident radiation.
In the case of external whole-body irradiation and generally also for
other exposure conditions the following values may be used for the effective
quality factor Qeff.
Radiation |
Qeff |
Roentgen and gamma radiation, beta radiation,
electrons, positrons |
1 |
Neutrons of unknown energy |
10 |
Alpha radiation |
20 |
Effective quality factor, Radiological
Protection Ordinance of 1989
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