Observation of the infrared spectra of the deuterated triatomic hydrogen molecular ions: H/sub 2/D/sup +/, HD/sub 2//sup +/, and D/sub 3//sup +/
The infrared vibrational-rotational spectra of the deuterated triatomic hydrogen molecular ions, H/sub 2/D/sup +/, HD/sub 2//sup +/. amd D/sub 3//sup +/ have been observed with the Doppler-tuned ion-beam laser spectroscopic method with collision detection. Triatomic hydrogen molecular ions are produced in a coaxial electron-impact ion source. Next, the ions are accelerated and formed into a beam of several keV energy, which is then intercepted at a small angle by a frequency-stabilized CO laser beam. The energy of the ion beam is adjusted to Doppler-shift an ion transition into resonance with a nearby laser line. On resonance, the laser light stimulates the transition to take place. If the resonating states differ in population, the laser-induced transition produces a net population transfer. The occurence of population transfer is detected by monitoring the transmission of the ion beam through a gas target after laser interaction. The transmission through the target is dependent upon the ion beam population distribution and, therefore, the laser-induced transition can be detected by detecting the change of the transmission of the ion beam. A mass analyzer before the target gas facilitates the mass identification of the observed transition. 45 D/sub 3//sup +/ transition frequencies, 9 H/sub 2/D/sup +/ transition frequencies, and 31 HD/sub 2//sup +/ transition frequencies, all between 1650 and 2000 cm/sup -1/, to better than 0.0005 cm/sup -1/ or 0.3 ppm have been measured. The identifications of the quantum numbers are still in progress. This study should greatly help the search of H/sub 3//sup +/ and H/sub 2/D/sup +/ ions in interstellar medium.
- Research Organization:
- Arizona Univ., Tucson (USA)
- OSTI ID:
- 5007187
- Resource Relation:
- Other Information: Thesis (Ph.D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HYDROGEN
INFRARED SPECTRA
MOLECULAR IONS
CARBON MONOXIDE LASERS
DEUTERIUM
ION BEAMS
LASER SPECTROSCOPY
BEAMS
CHARGED PARTICLES
ELEMENTS
GAS LASERS
HYDROGEN ISOTOPES
IONS
ISOTOPES
LASERS
LIGHT NUCLEI
NONMETALS
NUCLEI
ODD-ODD NUCLEI
SPECTRA
SPECTROSCOPY
STABLE ISOTOPES
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory