Demonstration of a new gamma spectrometer designed for radiometric surveying with an unmanned aircraft system

It appears your Web browser is not configured to display PDF files. Download adobe Acrobat or click here to download the PDF file.

Click here to download the PDF file.


Chen, Carolyn




The performance of a radiometric unmanned aerial system (UAS) composed of a directional gamma spectrometer, the Advanced Radiation Detector for Unmanned Aerial Vehicle Operations (ARDUO), and a medium-lift helicopter airframe was demonstrated. The ARDUO's properties of the full-width half maximum energy resolution, linearity, gain stability, intrinsic photopeak efficiency, sheet source sensitivity and directional response were characterized in laboratory experiments. Small-scale trials were conducted over a single point source and two point sources of Cs137 at a 27m separation. The single point source strength was measured at 175±39MBq, which is within error of the true source strength of 161MBq. The directional information was shown to improve source locating by differentiating the two point sources. A large-scale `L'-shaped distributed source trial using La140 was completed. The total activity distributed in the area was estimated at 12±1GBq. The directional information was shown to improve constraint of the `L'-shaped distribution area.


Physics - Radiation




Carleton University

Thesis Degree Name: 

Master of Science: 

Thesis Degree Level: 


Thesis Degree Discipline: 

Earth Sciences

Parent Collection: 

Theses and Dissertations

Items in CURVE are protected by copyright, with all rights reserved, unless otherwise indicated. They are made available with permission from the author(s).