Demonstration of x-ray back-scatter. A clear increase in dose rate can be seen when a glass plate is placed within the beam of x-rays.
Detector used is a Radiascan701A, keep in mind that the dose rate is incorrect as it over responds.
Tube used is a 0,8BPM14-160 X-Ray tube made by Svetlana Rentgen. It's run at 60kV 3,3mA.