Fast electrons in the negative glow of low-voltage cold-cathode discharges in helium
H M Grimley; K G Emeleus; H M Grimley; Physics Department, Queens University, Belfast; K G Emeleus; Physics Department, Queens University, Belfast
Журнал:
British Journal of Applied Physics
Дата:
1965-02-01
Аннотация:
The spectrum of the negative glow of a helium discharge tube with a cold sodium cathode includes the He II line at 4686 Å, with excitation potential 75 v, when the cathode fall is 80 v. The presence of the line, and the distance into the negative glow for which it can be traced with cathode fall 140 v, provide confirmatory evidence for the presence in the negative glow of fast electrons which have traversed a large part of the cathode dark space.
86.31Кб