Double resonance rotational spectroscopy of CH2D+

被引：20
作者：
Toepfer, Matthias [1 ]
Jusko, Pavol [1 ]
Schlemmer, Stephan [1 ]
Asvany, Oskar [1 ]
机构：
[1] Univ Cologne, Inst Phys 1, Zulpicher Str 77, D-50937 Cologne, Germany
来源：
ASTRONOMY & ASTROPHYSICS | 2016年 / 593卷
关键词：
astrochemistry; line: identification; molecular data; ISM: molecules; radio lines: ISM; 22-POLE ION-TRAP; THEORETICAL CALCULATIONS; SPECTRA;
D O I：
10.1051/0004-6361/201629038
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Context. Deuterated forms of CH3+ are thought to be responsible for deuterium enrichment in lukewarm astronomical environments. There is no unambiguous detection of CH2D+ in space to date. Aims. Four submillimetre rotational lines of CH2D+ are documented in the literature. Our aim is to present a complete dataset of highly resolved rotational lines, including millimetre (mm) lines needed for a potential detection. Methods. We used a low-temperature ion trap and applied a novel IR-mm-wave double resonance method to measure the rotational lines of CH2D+. Results. We measured 21 low-lying (J <= 4) rotational transitions of CH2D+ between 23 GHz and 1.1 THz with accuracies close to 2 ppb.
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页数：4
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