Lamb dip studies of the nuclear quadrupole coupling and dipole moment in an excited vibrational state of NH/sub 2/D
Journal Article
·
· J. Chem. Phys.; (United States)
OSTI ID:7355326
The hyperfine structure of two transitions in the ..nu../sub 2/=0..-->..1 vibrational band of the asymmetric rotor NH/sub 2/D is resolved. These spectra represent the first direct observation of /sup 14/N nuclear quadrupole splittings in the optical region. The transitions were observed using Lamb dip spectroscopy in which a Stark field is used to tune the spectral components through resonance with a CO/sub 2/ laser. Splittings of less than 1 MHz are resolved, and the nuclear quadrupole coupling constants in the excited vibrational state are determined to be chi/suba//suba/=2.52 +- 0.24, chi/subb//subb/=1.46 +- 0.36, chi/subc//subc/=-3.98 +- 0.29 MHz. In addition, we find ..mu../subc/=1.09 +- 0.04 D for the excited state permanent dipole moment. These values differ significantly from the ground state values, and some discussion of their physical implications is presented. (AIP)
- Research Organization:
- Optical Sciences Center, University of Arizona, Tucson, Arizona 85721
- OSTI ID:
- 7355326
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 64:12; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
AMMONIA
DEUTERIUM
DIPOLE MOMENTS
ENERGY LEVELS
EXCITED STATES
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
HYPERFINE STRUCTURE
ISOTOPE EFFECTS
ISOTOPES
LAMB SHIFT
LIGHT NUCLEI
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUCLEI
ODD-ODD NUCLEI
SPECTRA
SPECTRAL SHIFT
STABLE ISOTOPES
VIBRATIONAL STATES
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
AMMONIA
DEUTERIUM
DIPOLE MOMENTS
ENERGY LEVELS
EXCITED STATES
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
HYPERFINE STRUCTURE
ISOTOPE EFFECTS
ISOTOPES
LAMB SHIFT
LIGHT NUCLEI
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUCLEI
ODD-ODD NUCLEI
SPECTRA
SPECTRAL SHIFT
STABLE ISOTOPES
VIBRATIONAL STATES