[en] Energy-distribution spectra have been measured for secondary electrons backscattered into a narrow angle about the normal direction to three tungsten-single-crystal faces, viz. (100), (110), and (111). Improved spectral resolution provides evidence for emission from excited states located above the vacuum level, the intensity of emission being related to one-dimensional density-of-states features along the corresponding low-index symmetry lines. Good agreement with a calculated energy-band structure is observed