NS(B) (Nitrogen Sulfide (B State)) Spectrum Theory and Code

During the past year the Laser Kinetics Branch has been studying the B2II - X2II transition in nitrogen-sulfide. We have been particularly interested in this transition because we think the B states 1 micro second lifetime and large Franck-Condon shift make it a good short wavelength chemical laser candidate. As part of our study we have determined the rotational and vibrational populations of the excited molecule produced in an SN3 to NSB N2 reaction. To do this accurately it was necessary to write a spectrum code. This document outlines the theory, explains how to run, and provides a listing of the spectrum code and accompanying files. It should be noted that even though this code was written specifically for the NSB2II - NSX2II transition, it is easily modified to do a variety of other molecules and transitions.