Related Experiment Video
Updated: Jun 20, 2026

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Vacuum-ultraviolet laser-excited spectra of Xe(2)
Abstract:
Fluorescence excitation of Xe(2) at 149.0 nm has been observed using a pulsed supersonic jet for dimer formation and cooling and using tunable coherent VUV radiation from four-wave mixing in Mg vapor for excitation. The resolved vibronic structure resulting from isotopic Xe(2) molecules has yielded unambiguous vibrational numbering (upsilon'=37-46), giving the following constants for the first O(+)(u) excited state of Xe(2): T(e) = 63 796(6) cm (-1), omega'(e) = 124.86(30) cm(-1), omega(e)X'(e) = 0.937(3) cm(-1), and D(e) = 4446(7) cm(-1).
Related Concept Videos
UV–Vis Spectroscopy: Molecular Electronic Transitions
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
Atomic Emission Spectroscopy: Lab
Atomic Emission Spectroscopy: Instrumentation
Atomic Emission Spectroscopy: Overview
UV–Vis Spectrometers

