title: Ag8 fluorescence in argon.
abstract: The fluorescence of Ag8 in an argon matrix and in argon droplets is reported. This is the first unambiguous assignment of the fluorescence of a metal cluster larger than the tetramer, indicating that the excited state lifetime is longer than previously thought. It is discussed as a possible result of a matrix cage effect. The excitation spectrum is compared with two-photon-ionization measurements of Ag8 in helium droplets and to known absorption data. The agreement is excellent. We propose that the excited states relax rapidly through vibrational coupling to a long-lived state, from which the fluorescence occurs.
authors: Institut de Physique Expérimentale, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
authors: C
authors: C
authors: Félix
authors: C
authors: C
authors: Sieber
authors: W
authors: W
authors: Harbich
authors: J
authors: J
authors: Buttet
authors: I
authors: I
authors: Rabin
authors: W
authors: W
authors: Schulze
authors: G
authors: G
authors: Ertl