N2H+, ν2 IR band
Diazenylium, ν2 IR band
Species tag 029516
Version1*
Date of EntryNov. 2010
ContributorH. S. P. Müller

The entry has been generated from a combined fit. The ν2 band origin was determined from IR transitions published by
(1) T. J. Sears, 1985, J. Opt. Soc Am. B 2, 786;
Q(10) was omitted from the fit.
The v = 0 data were taken from
(2) P. Verhoeve, E. Zwart, M. Versluis, M. Drabbles, J. J. ter Meulen, W. L. Meerts, A. Dymanus, and D. B. McLay, 1990, Rev. Sci. Instrum. 61, 1612;
from
(3) T. Amano, T. Hirao, and J. Takano, 2005, J. Mol. Spectrosc. 234, 170;
and from
(4) L. Pagani, F. Daniel, and M.-L. Dubernet, 2009, Astron. Astrophys. 494, 719;
see also e029506.cat.
The v2 = 1 data were taken from
(5) T. Amano, T. Hirao, and J. Takano, 2005, J. Mol. Spectrosc. 234, 170;
see also e029509.cat.
The predictions should be reliable up to J = 15, mayb even 20.
Note: The partition function takes into account the 14N hyperfine splitting as well as contributions from the vibrationally excited v2 = 1 state ! Individual non-zero contributions are given in parentheses.
The transition dipole moment was derived from an ab initio calculation by
(6) H. S. P. Müller, 2010, unpublished.

Lines Listed117
Frequency / GHz< 24120
Max. J117
log STR0-100.0
log STR1-7.5
Isotope Corr.-0.0
Egy / (cm–1)0.0, 685.25
 µa / D0.39
 µb / D 
 µc / D 
 A 
 B46586.87, 46691.33
 C 
 Q(500.0)2575.2763 (2017.3880, 557.8883)
 Q(300.0)1300.9224 (1211.2265, 89.6959)
 Q(225.0)931.5116 (909.0575, 22.4541)
 Q(150.0)608.6347 (606.9667, 1.6680)
 Q(75.00)304.9598 (304.9586, 0.0012)
 Q(37.50)153.9969
 Q(18.75)78.5512
 Q(9.375)40.8884
 Q(5.000)23.4212
 Q(2.725)14.5633
detected in ISM/CSMno


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