Rotational transitions of CH2D+ determined by high-resolution IR spectroscopy

Details Rotational transitions of CH2D+ determined by high-resolution IR spectroscopy Rotational transitions of CH2D+ determined by high-resolution IR spectroscopy

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010a%26a...516l...3g&link_type=abstract

Astronomy and Astrophysics, Volume 516, id.L3

Astronomy and Astrophysics

Astrophysics

2

Methods: Laboratory, Ism: Molecules, Submillimeter: Ism

Scientific paper

Context. Deuterated forms of CH_3^+ are responsible for deuterium fractionation in warmer environments. Current searches for CH2D+ are hampered by a lack of accurate laboratory data. Aims: We demonstrate that IR spectroscopy at very high resolution can make accurate rotational predictions. Methods: By combining a low-temperature ion trap with a narrow-bandwidth IR light source, we are able to measure vibrational transitions with high accuracy. A subsequent fit using an asymmetric rotor model allows predictions of MHz accuracy or even better. Results: We predict rotational transitions up to 1.5 THz.

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