An Apparatus for the Measurement of Alpha‐Particle Range and Relative Stopping Power of Gases

摘要

A description is given of an apparatus which has been developed for measuring the extrapolated range of alpha‐particles in gases by the method of specific ionization. The improved apparatus is designed after the Curie‐Naidu apparatus but increases the specific ionization current about one hundredfold without increasing the thickness of the alpha‐particle source.