Forward/backward ratio of secondary emission produced by 1.3 MEV electrons

✍ Scribed by M.A. Pomerantz; J.F. Marshall; R.A. Shatas

• Publisher: Elsevier Science
• Year: 1954
• Tongue: English
• Weight: 64 KB
• Volume: 257
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(54)90682-1

✦ Synopsis

operating range. One finds that electrolytic effects give rise to a transformation from semi-conductor behavior to seml-metallic behavior, a process which tends to be self-limiting as the electronic conduction increases.

Ionic effects never disappear completely, however. Recent experiments here have indicated that, for currents in excess of a critical value, electrolytic phenomena appear even in highly metallized specimens. The existence of a critical current value is presumed to correspond to a critical decomposition potential difference across individual grains of the material. Work is now in progress toward the setting up of an appropriate cell for the study of this phenomenon. Studies of the diffusion of thorium metal into thorium oxide single crystals form a part of this program. * Assisted by the U. S.