IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    NBS-NIST Centennial Sunday Sessions
       Session NB-SuP

Paper NB-SuP10
Triply Differential Photoelectron Spectroscopy at SURF-II

Sunday, October 28, 2001, 6:20 pm, Room 121

Session: NBS/NIST Centennial
Presenter: R.L. Stockbauer, Louisiana State University
Authors: R.L. Stockbauer, Louisiana State University
D.L. Ederer, Tulane University
J.B. West, Daresbury Laboratories
K. Codling, Reading University
A.C. Parr, NIST
J. Dehmer, NSF
Correspondent: Click to Email
Starting in 1979, we developed a sophisticated spectrometer that was used to make angularly and vibrationally resolved photoelectron measurements. The studies concentrated on resonance phenomena in gas phase atomic and molecular systems. The initial instrument utilizing a single spectrometer was replaced with a dual spectrometer system in the early 1980s. These instruments were used to obtain detailed vibrationally resolved information on the effects of shape resonances and autoionization on the distribution of the final states of the molecular ion. We were the first to report striking non-Franck-Condon intensity distributions associated with a shape resonance in N@sub 2@. Subsequent studies uncovered unusual intensity distributions in the vibrationally resolved spectra that could not be directly explained by predictions of traditional calculations of molecular photoionization. The high resolution and sensitivity of the NIST spectrometer enabled the identification of a new Rydberg series in O@sub 2@. The most comprehensive data set was taken on the CO@sub 2@ molecule, discovering forbidden interactions between vibrational bending and stretching modes. We will review the highlights of over a decade of work.