LEVEL16 is R.J. Le Roy's program for calculating the eigenvalues
of bound and quasibound levels of any smooth one-dimensional or radial
potential, together with (as desired) expectation values and centrifugal
distortion constants for specified levels, and Franck-Condon factors
or matrix elements of specified powers of a chosen distance variable
(and hence of quantities expanded as power series in this variable)
or of a user-specified radial function defined by interpolating
over a set of read-in points. Such off-diagonal matrix elements
may couple levels of the same potential or levels of two different
potentials, subject to rotational selection rules specified by
the user's input data file. A full description of the most recent
version of this code has been published in
J. Quant. Spectrosc. Radiat. Transfer 186, 167 (2016), which is
while the corresponding source code and
detailed Program Manual are available as Supplementary "Application"
files at that www link. All future citations regarding use of this code
should refer to this Journal Article,
If you wish to be Registered with the author as
a user of this code, eligible to be sent any future
bug fixes or updates, please fill in the following form
Register LEVEL-16 Registration. Note - registering will allow
you to receive news of code updates, but to obtain he source code itself,
you should go to the above JQSRT www site link.
Note that the order in which some input parameters are read has been
modified (hopefully improved) from that in earlier versions, so previous
users are advised to read the program manual carefully when setting up
their input data files. This new version uses the 2010 values of ħ,
and its atomic masses subroutine incorporates the 2012 version of the
atomic mass table.
As ever, I would be pleased to receive information regarding apparent
or real malfunctions of this code or weakness in the documentation,
please contact the author by e-mail: 'leroy AT uwaterloo.ca'
Site owned by R.J. Le Roy, leroy AT uwaterloo.ca.
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