Abstract
A moderator type neutron dosemeter is described and its response to 'realistic neutron fields' and fission sources is investigated, for irradiations with and without a poly-methyl methacrylate (PMMA) phantom. Changes in response induced by the use of the moderator are observed throughout the experiments, with respect to the energy distribution of the neutron fluence and the dose equivalent. The experimental dosemeter shows an over-response to thermal neutrons and for on phantom irradiations, and a low sensitivity for fast neutrons. Compared to a classical neutron dosemeter based on silicon diodes (without moderator), the actual design shows, for the same active area of the silicon detector, a sensitivity (counts per mSv) from 10 to 40 times higher for 'realistic neutron fields'.
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