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EnglishThe submillimetre-wave spectrum of the molecular ions N15NH+, 15NNH+, N15ND+, and 15NND+ have been investigated in the laboratory using a source-modulation microwave spectrometer equipped with a negative glow discharge cell. The diazenylium ion was produced in a Ar/N2/H2(D2) discharge plasma and the 15N-containing isotopologues were observed in natural abundance. Six new rotational transitions for the protonated species and seven for the deuterated ones were accurately measured in the frequency range 270−760 GHz. These new laboratory measurements of the rare isotopologues of N2H+ provide very precise rest frequencies at millimetre and submillimetre wavelengths useful for the radioastronomical identification of their rotational lines in the ISM.
| Titolo: | Accurate rest frequencies for the submillimetre-wave lines of the 15N-containing isotopologues of N2H+ and N2D+ |
| Autore/i: | DORE, LUCA; BIZZOCCHI, LUCA; DEGLI ESPOSTI, CLAUDIO; TINTI, FRANCESCA |
| Autore/i Unibo: | |
| Anno: | 2009 |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1051/0004-6361/200811235 |
| Abstract: | The submillimetre-wave spectrum of the molecular ions N15NH+, 15NNH+, N15ND+, and 15NND+ have been investigated in the laboratory using a source-modulation microwave spectrometer equipped with a negative glow discharge cell. The diazenylium ion was produced in a Ar/N2/H2(D2) discharge plasma and the 15N-containing isotopologues were observed in natural abundance. Six new rotational transitions for the protonated species and seven for the deuterated ones were accurately measured in the frequency range 270−760 GHz. These new laboratory measurements of the rare isotopologues of N2H+ provide very precise rest frequencies at millimetre and submillimetre wavelengths useful for the radioastronomical identification of their rotational lines in the ISM. |
| Data prodotto definitivo in UGOV: | 2009-12-11 10:44:18 |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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http://hdl.handle.net/11585/80703
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