Use of prompt gamma emissions from polyethylene to estimate neutron ambient dose equivalent

P, Priyada and P.K, Sarkar (2015) Use of prompt gamma emissions from polyethylene to estimate neutron ambient dose equivalent. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 785. pp. 135-142. ISSN 0168-9002

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Official URL: http://www.elsevier.com/locate/nima

Abstract

The possibility of using measured prompt gamma emissions from polyethylene to estimate neutron ambient dose equivalent is explored theoretically. Monte Carlo simulations have been carried out using the FLUKA code to calculate the response of a high density polyethylene cylinder to emit prompt gammas from interaction of neutrons with the nuclei of hydrogen and carbon present in polyethylene. The neutron energy dependent responses of hydrogen and carbon nuclei are combined appropriately to match the energy dependent neutron fluence to ambient dose equivalent conversion coefficients. The proposed method is tested initially with simulated spectra and then validated using experimentalmeasurements with an Am–Be neutron source. Experimental measurements and theoretical simulationshave established the feasibility of estimating neutron ambient dose equivalent using measured neutron induced prompt gammas emitted from polyethylene with an overestimation of neutron dose at very low energies.

Item Type: Article
Uncontrolled Keywords: Neutron dosimeter Prompt gamma measurements Ambient dose equivalent Monte Carlo simulations
Subjects: Departments at MU > Manipal Centre for Natural Sciences
Depositing User: MCNS Editor
Date Deposited: 27 Mar 2015 11:09
Last Modified: 27 Mar 2015 11:09
URI: http://eprints.manipal.edu/id/eprint/142276

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