“…[8][9][10][11][12][13] This mechanism of the enhancement of the surface photoemission is widely recognized and has been reported for clean surfaces and thin films of simple metals. 3,11,14,15 The mapping of the bulk band structure, using photoemission techniques, 7,[16][17][18] can be facilitated by enhanced cross section ͑and therefore more intense peaks in the photoemission spectra͒ through the Coster-Kronig resonant optical transitions, as allowed by the photoemission selection rules. Identification of the bands, however, is complicated by surface and adsorbate umklapp processes [19][20][21] and surface reconstructions, in particular, well known to occur with molybdenum surfaces.…”