Published June 1932. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
The use of radioactive isotopes as tracers in biological systems
has become widespread since the close of World War II. Proper
use of radiotracers requires a fundamental understanding of the physical
nature of radioactivity, the characteristics of ionizing radiation,
and the various methods available for measuring radioactivity.
More importantly, the...
A technique was investigated in which a silicon crystal was
used as a very sensitive detector of sub-nanogram quantities of
boron. The unknown quantity of boron was spread uniformly on
the surface of an n-type silicon wafer which was then baked for
diffusion. The measured depth of the p-n junction...