G. Aeppli, J.J. Donelon, et al.
Journal of Electron Spectroscopy and Related Phenomena
An ultrahigh vacuum photoelectron spectrometer capable of measuring electron energy distributions for solids and chemisorbed gases at photon energies of 16.8, 21.2, 26.9, and 40.8 eV is described. © 1971 The American Institute of Physics.
G. Aeppli, J.J. Donelon, et al.
Journal of Electron Spectroscopy and Related Phenomena
P. Heimann, J.F. van der Veen, et al.
Solid State Communications
G. Kaindl, C. Laubschat, et al.
Physical Review B
D.E. Eastman, J.K. Cashion
Physical Review Letters