Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 716, Issue 1, Pages L1-L3Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/716/1/L1
Keywords
ISM: molecules; methods: laboratory; molecular data; submillimeter: general
Categories
Funding
- Natural Science and Engineering Research Council of Canada (NSERC)
- University of Waterloo
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new set of laboratory experimental frequencies for the J = 1-0 rotational transition of (CH+)-C-12, (CH+)-C-13, and (CD+)-C-12 are obtained by using a liquid nitrogen cooled extended negative glow discharge in a gas mixture of CH4 and He. These frequencies are found to be significantly different from those reported previously. The unexpectedly large Zeeman effect and the spin-rotation hyperfine interaction for a (1)Sigma molecule are observed. The Zeeman effect and the hyperfine interaction appear to be distinctively different for each isotopic species. Theoretical considerations reveal the isotopic dependence of the magnitudes of these effects, and they also provide strong evidence for the identifications.
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