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.
L. Dore, L. Bizzocchi, C. Degli Esposti, F. Tinti (2009). Accurate rest frequencies for the submillimetre-wave lines of the 15N-containing isotopologues of N2H+ and N2D+. ASTRONOMY & ASTROPHYSICS, 496, 275-279 [10.1051/0004-6361/200811235].
Accurate rest frequencies for the submillimetre-wave lines of the 15N-containing isotopologues of N2H+ and N2D+
DORE, LUCA;BIZZOCCHI, LUCA;DEGLI ESPOSTI, CLAUDIO;TINTI, FRANCESCA
2009
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
