Phys. Rev. Lett. 86, 2992–2995 (2001)Ag8 Fluorescence in ArgonReceived 5 December 2000; published in the issue dated 2 April 2001 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. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.2992
DOI:
10.1103/PhysRevLett.86.2992
PACS:
36.40.Mr, 36.40.Vz, 61.46.+w
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