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!WaveFunc
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1996-07-02
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WaveFunc
~~~~~~~~
Version: 1.00
Date: 25th May 1996
Author: Chris Johnson
Address: 7 Lovedale Grove
Balerno
Edinburgh
EH14 7DR
Purpose: Chemistry related scientific software
Demonstration of the following
Å Wave functions
Å Wave functions squared
Å Franck-Condon overlap
Status of software: Freeware (although small donations are
always welcome)
__________________________________________________________
This application provides interactive help when the !Help
application (or !Bubblehelp) is active, and requires Risc OS
3.1 or later.
__________________________________________________________
Running the application
~~~~~~~~~~~~~~~~~~~~~~~
As a fully RISC-OS compliant application it can be started
from within the desktop by double clicking on the !WaveFunc
icon in a directory viewer, when it will be installed on the
iconbar.
On clicking with SELECT on the iconbar icon, a dialogue box
will be opened, into which you can enter your chosen
parameters. When you are satisfied with your parameters, you
may then plot the graph, which can show up to three
different vibrational levels (in the range 0 - 9)
Use the on-line help once the application is running.
__________________________________________________________
This application demonstrates the form of the wave
functions for the first ten vibrational levels of a harmonic
oscillator. The wavefunctions for up to three different
vibrational levels can be overplotted for comparison.
Instead of the wave functions, you can instead elect to plot
the square of the wave functions, which can be taken as
being equivalent to the probability of finding the system in
that particular state.
In electronic spectroscopy, the intensity of vibrational
component bands in an electronic transition is proportional
to the overlap of the wave functions of the initial and
final state. The third option gives a simple demonstration
of this, in that the squares of the wave functions for two
vibrational levels, and the overlap are plotted. Since the
equilibrium bond extensions are often different in the two
electronic states, there is also the option to offset the
equilibrium position for the second vibrational level.
Users are reminded that real molecules are not harmonic
oscillators, but the general principles demonstrated here
are equally valid for the anharmonic oscillator.
__________________________________________________________
The author would welcome bug reports, suggestions for new
features or improvements, and can be contacted at the
address given above, or via e-mail as
C.A.Johnson@hw.ac.uk
Registered users can obtain the latest version at any time
by sending a disc and return postage, or request a
uuencoded version by e-mail.
__________________________________________________________
This software is NOT public domain, but may be used and
passed on freely, as long as all included files remain
unaltered. If you wish to include this in a "PD" library,
then it is polite to obtain permission from the author.
__________________________________________________________