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Radiation Protection Dosimetry 20:19-24 (1987)
© 1987 Oxford University Press
The Individual Monitoring Quantity for Neutrons and its Relationship with Fluence
The ICRU, in Publication 39, recommends that individual doses should be monitored in terms of either: 'Individual Dose Equivalent, Penetrating, Hp(10)', or 'Individual Dose Equivalent, Superficial, Hs(0.07)'. For neutrons Hs(0.07) is, in the normal irradiation situation, never limiting and the relevant quantity is therefore Hp(10). For the purposes of standardisation and calibration the quantity can be defined in the ICRU sphere and becomes the same as the 10 mm 'Directional Dose Equivalent, H'(10)'. The relationship between this quantity and neutron fluence can be defined in terms of energy and angular conversion coefficients. Current information on these conversion coefficients is reviewed.