Y. Ueda et al., PERFORMANCE OF THE INVERSE-PHOTOEMISSION SPECTROMETER WITH A NEW BANDPASS PHOTON DETECTOR OF NARROW BANDWIDTH AND HIGH-SENSITIVITY, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 330(1-2), 1993, pp. 140-143
A combination of a SrF2 entrance window and a photomultiplier with the
Cu-BeO first dynode coated with KCl film realizes the bandpass photon
detector with the FWHM of 0.47 eV centered at 9.43 eV and the sensiti
vity improved by about one order of magnitude in comparison with the d
etector without the KCl film. The overall energy resolution of the inv
erse photoemission spectrometer consisting of an electron gun with a B
aO cathode and the new detector has been estimated to be 0.56 eV using
polycrystalline Au. Typical counting rate is 10(2)-10(3) counts/(muA
s) for unoccupied states near the Fermi level of the Au at an acceptan
ce angle of about 0.8pi sr with an Al collecting mirror.