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Standardization of 241Am-Be neutron radiation field to characterize the moderated (9″) neutron detector

Author:

Shamsuzzaman, M., Rahman, M. S., Siddiqua, T., Bhuiyan, M. M. H., Paul, D., Ferdous, J., Chakraborty, S. R. and Deb, A. K.

Subject Area:

Life Sciences

Abstract:

Neutron field of 241Am-Be calibrator was standardized in terms of corrected free field dose equivalent (FFDE) by applying several correction factors. Subsequently, characterization of nine inch moderated neutron remmeters (BF3 counter) were performed in terms of the standardized neutron field. Several correction factors were determined to standardize the neutron field. The geometrical correction factor, air scattering factor and room scatter factors lie in between 1.004 to 1.018, and 1.004 to 1.044 and 1.0004 to 1.005, respectively at the distances from 0.595 m to 2.0 m. The responses of the neutron remmeters were verified in terms of the corrected FFDE The average response of the neutron remmeters ASP2e/NRD and E600/NRD was found to be 1.0010.162 and 1.0130.164 which meets the ICRP recommendation for area monitoring detectors. The minimum and maximum estimated combined uncertainty for neutron dose measurement was 0.755% (k=1) and 2.495% (k=1).

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