We report the observation of the (0, 11, 0), (0, 20, 0), and (0, 00, 2) states of the weakly bound complex ArHF by direct far infrared absorption spectroscopy in a jet. A simultaneous analysis of all observed rovibrational frequencies has been conducted, and spectroscopic constants sensitive to the global topology of the intermolecular potential energy surface are given.
Bibliographical noteFunding Information:
The support of the National Science Foundation (Grant No. CHE-8807895), the Donors of the Petroleum Research Fund, administered by the American Chemical Society, a Joseph H. DeFrees Grant of Research Corporation, the University of Minnesota, and the McKnight Foundation are gratefully acknowledged. We also thank Dr. Jeremy Hutson for providing us with valuable predictions, and Dr. David Nesbitt and Dr. Chris Lovejoy for helpful suggestions.