The ionization in air by fast β particles and the influence thereon of the vapour mixture of ethyl-alcohol and water

✍ Scribed by W.J. Beekman

• Publisher: Elsevier Science
• Year: 1946
• Weight: 349 KB
• Volume: 12
• Category: Article
• ISSN: 0031-8914
• DOI: 10.1016/s0031-8914(46)80077-6

✦ Synopsis

The purpose of the present paper is to make a detailed study of the influence on the ionization in gases, specially in air, of the mixture of ethylalcohol and water, generally used as a source of vapour in the W i 1 s o n cloud chamber.

To this end both the probable and the primary ionization in air are determined at three pressures, viz. at 1 at, ½ at and ¼ at. Assuming the specific ionization in pure air in this region to increase linearly with the pressure, it is possible to deduce from the observed values the specific ionization in the vapourmixture. By applying this correction to the observed values the corrected values for pure air are found.