Download or read book The Use of High-efficiency Gamma Counting in Conjunction with Beta Counting for Discrimination Between Thorium and Uranium written by Robert H. Roethlisberger and published by . This book was released on 1951 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use of the high-pressure gamma chamber and vibrating reed electrometer to measure gamma activity and the end window Geiger counter to measure beta activity has permitted discrimination between activity due to thorium and that due to uranium so that the thorium and uranium content of ore samples can be determined radiometrically within a factor of 2 and usually within 15 per cent.