LIFBASE Spectroscopy Tool

LIFBASE is a software program to chart the spectroscopy of diatomic molecules that is available as freeware from SRI. The software is compatible with all 32-bit Windows versions. No support is available.

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Features include:

Comprehensive Database Capabilities

• Absolute rovibrational emission and absorption coefficients

• Variation of transition probabilities taking into account rovibrational wavefunctions and electronic transition moments

• Rotational radiative lifetimes and tabulated predissociation rates

• Frequencies for all rovibrational transitions

Spectral Simulation

• Optical emission, absorption, excitation laser-induced fluorescence

• Thermal and non-thermal population distributions

• Line broadening

• Interactive change of simulation parameters

• Graphic interface

The current release covers these molecules and electronic bands: 

• OH (A-X), OD (A-X)

• NO (A-X, B-X,C-X, D-X)

• CH (A-X, B-X, C-X)

• CN (B-X)

• CF (A-X, B-X)

• SiH (A-X)

• N₂⁺ (B-X)

Examples

Resolution effects in the spectrum of NO A-X(0,0):

Database and spectral simulation (actual screen outputs):