Heidelberg 1999 – scientific programme

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MO: Molekülphysik

MO 8: Poster II: Spektroskopie

MO 8.1: Poster

Tuesday, March 16, 1999, 16:00–19:00, PA

Tunable Far Infrared Spectroscopy of ^xKrH⁺ and ^xKrD⁺ (x=82,82,86) — •H. Linnartz¹, L.R. Zink², K.M. Evenson², H. Odashima³, F. Matsushima³, A. Kozato³, S. Tsunekawa³, and K. Takagi³ — ¹Institute for Physical Chemistry, University of Basel, Klingelbergstrasse 80, CH4056 Basel — ²NIST, 325 Broadway, Boulder, CO 80303 — ³Dept. of Physics, Toyama University, Gofuku 3190, Toyama 930-8555

Pure rotational absorption spectra of the krypton hydride ion in its ground electronic and vibrational state have been measured in the 0.5 - 3.5 THz range with tunable far-infrared spectrometers. The ions are generated in LN₂ cooled hollow cathode and magnetically extended negative glow discharges. The accurate frequency measurements determine the rotational constants B, D, and H, and yield transition frequencies accurate to 40 kHz (1σ). By combining all results a mass-independent Dunham analysis has been performed, yielding accurate information on the Born-Oppenheimer breakdown parameters.