title: Ageing of s-10 photocathodes.
abstract: The relative spectral sensitivity distributions of ten vacuum photodiodes with S-10 (Ag-Bi-O-Cs) photocathodes have been repeatedly measured over a period of up to 3 years. The results indicate that these photocathodes change considerably during the first 3 years of their life. The effect of these changes in photometric and colorimetric measurements is discussed.
authors.forename: W
authors.initials: W
authors.lastname: Budde