The rotation-vibration spectrum of HD - Wavelength and intensity measurements of the 3-0, 4-0, 5-0, and 6-0 electric dipole bands

Astronomy and Astrophysics – Astrophysics

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Deuterium, Electric Dipoles, Jupiter (Planet), Planetary Radiation, Rotational Spectra, Transition Probabilities, Vibrational Spectra, Absorption Spectra, Abundance, Ground State, Molecular Energy Levels, Planetary Atmospheres

Scientific paper

The paper reports laboratory observations of the 5-0 and 6-0 bands of the HD rotation-vibration spectrum, which were made over absorption paths of up to 3 km in a multiple-traversal absorption cell at 295 K and a pressure of 1.06 atm. Wavelengths in these bands as well as in the 3-0 and 4-0 bands are measured and used along with previous measurements to determine improved molecular constants for HD in the vibrational levels of the ground electronic state ranging from v = 0 to v = 6. Some intensity measurements of lines in the 4-0 and 5-0 bands are also presented, including a direct intensity measurement of the P4(1) line which has been observed in the Jovian spectrum. These measurements raise the deuterium abundance previously determined for Jupiter by a factor of 25 and suggest the possibility of detecting the HD 5-0 band in spectra of the giant planets.

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