The possible occurrence of exciton-enhanced secondary emission

✍ Scribed by A.J. Dekker

• Publisher: Elsevier Science
• Year: 1956
• Weight: 363 KB
• Volume: 22
• Category: Article
• ISSN: 0031-8914
• DOI: 10.1016/s0031-8914(56)80050-5

✦ Synopsis

A theoretical study is made of the possible occurrence of exciton-enhanced secondary emission in insulators containing donor levels. It is assumed that the primary beam produces, besides secondary electrons, excitons; the latter may ionize donors and thereby enhance the secondary yield. The discussion is limited to high primary energies, so that the range of the primaries is large compared to the diffusion length of the excitons. It is concluded that the enhancement may be considerable if the destruction of excitons at the surface is not too large.