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

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

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)


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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