Nuclear spin ratios of deuterated ammonia in prestellar cores - LAsMA observations of H-MM1 and Oph D

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Table 1

Observed transitions.

Transition		Freq. (MHz)	E_u (K)	A_ul (s⁻¹)
oNH₂D	$1_{01}^{a} - 0_{00}^{a}$ $1_{01}^{\rm{a}} - 0_{00}^{\rm{a}}$	332781.803	16.6	7.81 × 10⁻⁶
pNH₂D	$1_{01}^{s} - 0_{00}^{s}$ $1_{01}^{\rm{s}} - 0_{00}^{\rm{s}}$	332822.521	16.0	7.29 × 10⁻⁶
oNHD₂	$1_{11}^{s} - 0_{00}^{s}$ $1_{11}^{\rm{s}} - 0_{00}^{\rm{s}}$	335513.715	16.1	1.29 × 10⁻⁵
pNHD₂	$1_{11}^{a} - 0_{00}^{a}$ $1_{11}^{\rm{a}} - 0_{00}^{\rm{a}}$	335446.240	16.3	1.47 × 10⁻⁵

Notes. The frequencies are adopted from Melosso et al. (2021).

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