Updates in betaFIT 2.0
The following extensions to betaFIT have been implemented since the
release of Version 1.2 (April 2007).
 the Name of the code has been changed (from phiFIT) to reflect our
changing the name of the exponent coefficient function in the EMO, MLR and DELR
potentials from φ(r) to β(r), and hence changing the names of the
exponent polynomial expansion coefficients from φ_{i} to
β_{i} .
This was done to avoid confusion when dealing with 2D or 3D potentials for
which the exponent coefficient function β(r) could depend on the polar
angles θ and φ .
 Use of a radial variable expanded about r_{ref} is allowed
for the EMO, MLR and DELR potentials.

The MLR potential form may now:
 Make use of the second radial variable y_{q}(r), as per
Eq.(11) in the new Manual.

u_{LR}(r) may now include damping functions, as per Eq.(13).

Possible use of the AubertFrecon u_{LR}(r) function of
Eq.(15) is introduced as an illustration of the flexibility of the MLR form.

The exponent coefficient may (optionally) be represented using Pashov's
``splinepointwise'' approach.

The damping function used for the DELR potential form is now the
incomplete gamma function of Eq.(14).
Site owned by R.J. Le Roy: leroy @ UWaterloo.ca.
This page was last updated on June 8, 2009