Archive for December, 2018

Neutron dose rate app extended to reference neutron sources

December 13th, 2018

The neutron dose rate application, previously restricted to monoenergetic neutrons, has been extended to include the spectrum averaged ambient dose equivalent coefficients for common neutron sources. This allows the user to calculate ambient dose rates for the following reference radionuclide neutron sources:
– Cf252;
– Cf252 (D2O moderated);
– Am241-B; and
– Am241-Be
NDR_2 In the example above, the neutron dose rate for 1 g Cf-252 at 1 m is 2.65e7 µSv/h and results from a neutron source strength of 2.40e12 neutrons s-1 at the source and 1.91e7 neutrons cm-2 s-1 at 1 m distance from the source.

More information…
– Neutron Dose Rate application wiki page
– Reference neutron radiations — Part 1: Characteristics and methods of production, ISO 8529-1:2001, 2001. Link. See also … link
– Neutron Shielding for a 252Cf Source. Link

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