ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
A previously unknown excited electronic state of Ag2 has been observed using mass selected resonant two photon ionization. The initial rovibrational level of this state observed via a forbidden transition near 46 870 cm−1 lies in near perfect double resonance with the lower energy A 1Σ+u(v'=3)←X 1Σ+g(v'=0) transition. The double resonance leads to an anomalously large single color ionization signal near the A(v'=3)←X(v‘=0) transition wavelength (426.7 nm). Symmetry selection rules allow an identification of the new state symmetry as 1g or 0+g [Hund's case (c)]. The presence of this state is demonstrated to have a significant impact on previous measurements of the ionization potential of Ag2. Two color resonant two photon ionization spectroscopy of the Ag2 A1Σ+u state is implemented using both excimer laser and Nd:YAG laser fourth harmonic ionization. The results of these experiments yield a new measurement of the ionization potential of Ag2, while demonstrating the importance of field ionization effects. © 1995 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.468752
