Rotationally resolved photoelectron spectroscopy of n-H/sub 2/, p-H/sub 2/, HD, and D/sub 2/

Journal Article · Thu Jul 01 00:00:00 EDT 1982 · J. Chem. Phys.; (United States)

OSTI ID:5198953

Pollard, J E; Trevor, D J; Reutt, J E; Lee, Y T; Shirley, D A

The 584 A photoelectron spectra of n-H/sub 2/, p-H/sub 2/, HD, and D/sub 2/ were recorded at a resolution of 11 meV FWHM using a supersonic molecular beam source. Spectra were taken at several stagnation temperatures and pressures in order to vary the rotational population distribution in the beam with a corresponding variation in the relative intensities of the rotational transitions. Many of the Q-branch components were resolved for the first time. ..delta..G(v+1/2) and B/sub v/ values were measured for all observed vibrational states of H/sup +//sub 2/, HD/sup +/, and D/sup +//sub 2/ and were used to determined the ionic vibrational and rotational constants: ..omega../sub e/, ..omega../sub e/x/sub e/, ..omega../sub e/y/sub e/, ..omega../sub e/z/sub e/, B/sub e/, and ..cap alpha../sub e/. The results represent a substantial improvement over previous experimental determinations and were found to be consistent with the available theoretical rotation-vibration energy levels. The measurement of the intensity distribution of photoelectrons as a function of vibrational states yielded photoionization cross sections which were in good agreement with the theoretical values calculated by O'Niel and Reinhardt.

• Research Organization: Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
• OSTI ID: 5198953
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 77:1; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
BEAMS
DEUTERIDES
DEUTERIUM
DEUTERIUM COMPOUNDS
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN DEUTERIDE
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MOLECULAR BEAMS
MOLECULAR STRUCTURE
NONMETALS
NUCLEI
ODD-ODD NUCLEI
PHOTOELECTRON SPECTROSCOPY
ROTATIONAL STATES
SPECTROSCOPY
STABLE ISOTOPES