Statistics – Applications
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phrvl.100w3004a&link_type=abstract
Physical Review Letters, vol. 100, Issue 23, id. 233004
Statistics
Applications
16
Radio-Frequency And Microwave Spectra, Rotational Analysis, Ion Trapping, Atomic And Molecular Data, Spectra, And Spectral Parameters
Scientific paper
The lowest-lying 101←000 transition of para-H2D+ and 111←000 of ortho-D2H+ has been detected by the enhancement of the D/H isotope exchange reaction in collisions with p-H2 upon rotational excitation. These are the first pure rotational spectra of molecular ions by action spectroscopy. For this purpose, a cryogenic multipole ion trap has been combined with narrow-band tunable radiation sources operating in the 1.25 to 1.53 THz range. The low temperature of the ions allows us to determine the astronomically important transitions with a relative precision of Δν/ν=10-8. While the 1 476 605.708(15) MHz line center frequency for the o-D2H+ transition agrees very well with previous unpublished work, the 1 370 084.880(20) MHz line center frequency for the p-H2D+ transition deviates by 61 MHz. Potential future applications of this new approach to rotational spectroscopy are discussed.
Asvany Oskar
Giesen Thomas F.
Müller Holger S. P.
Ricken Oliver
Schlemmer Stephan
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