Submillimeter-wave spectrum of CH2D+ | Astronomy & Astrophysics (A&A)

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Table 1:

Observed transition frequencies for CH₂D⁺ (in MHz).
Transition		This work^a	Rösslein et al. (1991)^b
2₁₂-1₁₁	o	490 012.247(30)	490 012.30
2₁₁-1₁₀	o	624 492.648(20)	624 492.58
3₁₃-2₁₂	o	722 354.622(25)	722 354.74^c
3₂₂-2₂₁	p	835 464.376(50)	835 465.29^c

Notes. ^(a) The numbers in parentheses indicate estimated uncertainties to the last significant digits.
^(b) The uncertainties of these predicted values is given to be $2\times 10^{-5}$ . It translates to 12 MHz uncertainty for the 624.5 GHz line.
^(c) Calculated value obtained by using the molecular constants given by Rösslein et al. (1991).

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