                  NF3 PSEUDO-LINELIST

            Voltaire Velazco and Geoff Toon


INTRODUCTION.
This document gives information on the NF3 pseudo-linelist derived
at JPL in Oct 2008. The linelist was created based on figures in the
paper from Molina et al., [1995].

DESCRIPTION.
First, figure 3 (lower) of Molina et al., 1995 was digitized
to a point spacing of 0.01 cm-1 ranging from 870 to 930 cm-1.
The band is centered at about 910 cm-1.  Its rotational structure
is partially resolvable even in the presence of an atmospheric
buffer gas. For the measurements, Molina et al., 1995 used a
cell with a 15.45 cm path length and measured with a resolution
of 0.09 cm-1. Helium was used as a buffer gas (more details can
be found in the paper).  For now, we assigned a E"=300 for each
line, since we do not sufficient knowledge on the temperature
dependence of NF3.

The line strengths were adjusted by multiplying 1.7495 to match
the revised integrated band strengths provided by Robson, et al.,
2006. We did not based the linelist on the Robson et al. data
themselves because their spectral resolution (0.5 cm-1) is
insufficient to resolve the rotational structure in the R-branch.

The following fundamental vibrational band frequencies and
degeneracies were assumed for the four fundamental bands
(Wilson & Polo, 1952):

Band  |   nu1   nu2   nu3   nu4
freq. |  1032   647   905   493
degen |    1     1     2     2


ACKNOWLEDGMENTS.
We would like to thank Skye Aaron from the JPL summer student
program, for helping with the digitization of the NF3 band.

REFERENCES.
Molina L. T., P. J. Woolridge, M. J. Molina, "Atmospheric reactions
and ultraviolet and infrared absorptivities of nitrogen trifloride",
Geophys. Res. Lett., Vol 22, No. 14, pp. 1873-1876, 1995.

Robson J., L. K. Gohar, M. D. Hurley, K.P. Shine, T. J. Wallington,
Revised IR spectrum, radiative efficiency and global warming potential
of nitrogen trifluoride, Geophys. Res. Lett., Vol. 33, L10817,
doi:10.1029/2006GL026210, 2006

Wilson M. K., S.R. Polo, The infrared Spectra of NF3 and PF3, Journal of
Chem. Phys. Vol 20, No. 11, 1952.
