A Novel Neutron-Gamma Dosimeter
32nd Annual CNS Conference - 2011 June 05-08


Presented at:
32nd Annual CNS Conference
2011 June 05-08
Location:
Niagara Falls, Canada
Session Title:
Radiation Applications, Dose and Medical Isotopes

Authors:
Tara Wood (Royal Military College of Canada)
Brent Lewis (Royal Military College of Canada)
Emily Corcoran (Royal Military College of Canada)
Kevin McDermott (Royal Military College of Canada)
  

Abstract

A novel DNA dosimeter, comprised of synthetic DNA strands suspended in water, is capable of accurate absorbed dose-to-tissue measurements in mixed neutron-gamma fields.  When exposed to ionizing radiation, the DNA strands break releasing a fluence of visible photons.  The system responds equally to all radiation types including neutron radiation.  Based on theoretical analysis, the DNA dosimeter is accurate to 14% at one standard deviation when measuring an unknown spectrum of mixed neutron-gamma radiation.  Linearity has been experimentally verified in gamma and x-ray fields from 100 mGy to 10 Gy and the detector’s lower limit of detection is 100 mGy. 

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