title: Photoelectron collection efficiency in photomultipliers.
abstract: Direct measurement of the photoelectron collection efficiency in the EMI 9558 photomultiplier yields a value of 75 +/- 10%. The authors of this paper believe the substantially lower values recently reported to be spurious and discuss their reasons for this.
authors.forename: A T
authors.initials: AT
authors.lastname: Young
authors.forename: R E
authors.initials: RE
authors.lastname: Schild