Amidogen, azanyl, X 2B1, 15N isotopolog
Species tag 017504
Date of EntryMay 2016
ContributorL. Margulès
H. S. P. Müller

The data were taken from
(1) L. Margulès, M. A. Martin-Drumel, O. Pirali, S. Bailleux, G. Wlodarczak, P. Roy, E. Roueff, and M. Gerin, 2016, Astron Astrophys. 591, Art. No. A110.
Some parameters were kept fixed to value from the main species.
Since 15N is quite rare in molecular clouds, the entry should be well sufficient for all astronomical observations. Predictions with uncertainties larger than 0.5 MHz should be viewed with some caution, those with uncertainties larger than 10 MHz with great caution.
The dipole moment was assumed to agree with that of the main isotopolog, see e014501.cat.
At low temperatures, it may be necessary to discern between ortho-15NH2 and para-15NH2. The ortho states are described by Ka + Kc even, the para states by Ka + Kc odd. There are three times as many levels for ortho-15NH2 than there are for para-NH2. Thus, for transitions with unresolved 1H hyperfine splitting the nuclear spin-weight ratio is 3 : 1 between ortho-15NH2 and para-15NH2. However, for transitions with resolved 1H hyperfine splitting no non-trivial spin-statistics have to be considered. The NKaKc = 101; J, F1 = 1.5, 2 is the lowest para state. It is 21.0864 cm–1 above ground. Separate para and ortho predictions are available along with separate para and ortho partition function values. NOTE: The redundant quantum number Itot has been omitted !

Lines Listed2437
Frequency / GHz< 2000
Max. J11
log STR0-9.0
log STR1-7.5
Isotope Corr.-2.436
Egy / cm–10.0
 µa / D 
 µb / D1.82
 µc / D 
 A / MHz704388.4
 B / MHz388292.2
 C / MHz244293.7
detected in ISM/CSMno

Database maintained by Holger S. P. Müller and Sven Thorwirth, programming by D. Roth and F. Schloeder