This article reports on ultraviolet reflection-absorption spectroscopy of C
6H6 molecules physisorbed on Ag, Cu, and Au surfaces. The electronic (1)A(1
g)-->B-1(2u) transition of C6H6 at wavelengths near 250 nm is observed. We
model the system and obtain center frequencies, linewidths, and estimates o
f the oscillator strengths for the various vibronic absorptions. (C) 2000 A
merican Institute of Physics. [S0021-8979(00)02520-2].