On the photographic action of slow electrons

Abstract

The fact that fast moving electrons have a blackening effect on photographic emulsion has been known for a quarter of a century and many investigators have utilised this important property in their researches. In the important fields of β-ray and X-ray electron investigation, for example, electron spectra have been recorded photographically, Innes leading the way in 1907, followed amongst others, by Robinson and Rawlinson, de Broglie and Whiddington. Within the last year or two, G. P. Thomson and Reid have also used this method for the recording of electron diffraction patterns.