[Bornagain-announcements] New release of BornAgain: version 1.18

[Joachim Wuttke]

Today, BornAgain 1.18.0 has been released.

The most important change is improved numerics for the computation of reflection 
and transmission of scalar or polarized beams. The new algorithms is numerically 
stable even for arbitrarily many layers and for low overall transmission. For 
rough interfaces, one can choose between a tanh scattering-length density 
profile and the Névot-Croce approximation. There is a new documentation section 
with polarized reflectometry examples.

There are a few API changes.
- Some classes have been renamed for clarity or brevity: FootprintSquare, 
FootprintGauss, FormFactorHollowSphere, CosineRipple, SawtoothRipple.
- FormFactorGaussSphere now models a sphere, not an ellipsoid.
- FormFactorSphereLogNormalRadius is now positioned at the center, not at the 
bottom.
- In constructors that involve the Voigt function, the order of the arguments 
gamma and eta has been unified.

In examples, the material with refractive index 1 has been renamed from “air” to 
“vacuum”.

As always, we very much welcome your comments and feedback!

- Gennady, Randolf, Joachim

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