Spectroscopic identification of the lowest rotation--vibration levels of the (2p-italicsigma)/sup 2/ F-italic /sup 1/. sigma. /sup +//sub g-italic/ state of the D/sub 2/ molecule

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · J. Chem. Phys.; (United States)

OSTI ID:5648231

Senn, P; Quadrelli, P; Dressler, K; Herzberg, G

The previously unobserved lowest vibrational levels of the F-italic state of D/sub 2/ are detected by the identification of F-italic /sup 1/..sigma../sup +//sub g-italic/--B-italic /sup 1/..sigma../sup +//sub u-italic/ bands in infrared emission spectra of electric discharges recorded with a Fourier--transform spectrometer. The rotation--vibration structure of the F-italic state, v-italic = 0--5, J-italic = 0--5, is in good agreement with accurate a-italicb-italic i-italicn-italici-italict-italici-italico-italic calculations which include the effects of tunneling in the double-minimum potential of the E-italicF-italic /sup 1/..sigma../sup +//sub g-italic/ state. For the v-italic = J-italic = 0 levels of H/sub 2/ and D/sub 2/ the absolute energy error of the a-italicb-italic i-italicn-italici-italict-italici-italico-italic calculation extrapolates, for infinite nuclear mass, to an error of the electronic F-italic state energy of +0.7 +- 0.1 cm/sup -1/. This is consistent with Jungen's recent accurate spectroscopic determination of the ionization potentials of the excited states of H/sub 2/.

• Research Organization: Physical Chemistry Laboratory, ETH-Zentrum, CH-8092 Zurich, Switzerland
• OSTI ID: 5648231
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 85:5; 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
DEUTERIUM
ELECTRIC DISCHARGES
ELECTRONIC STRUCTURE
EMISSION SPECTRA
ENERGY LEVELS
EXCITED STATES
F STATES
HYDROGEN ISOTOPES
INFRARED SPECTRA
ISOTOPES
LIGHT NUCLEI
NUCLEI
ODD-ODD NUCLEI
ROTATIONAL STATES
SPECTRA
STABLE ISOTOPES
VIBRATIONAL STATES