# CSSI Element: A General and Effective B-Spline R-Matrix Package for Charged-Particle and Photon Collisions with Atoms, Ions, and Molecules

poster

posted on 2020-01-30, 21:37 authored by Klaus BartschatKlaus Bartschat, Oleg Zatsarinny, Kathryn HamiltonThis project concerns the development and subsequent distribution of a
suite of computer codes that can accurately describe the interaction of
charged particles (mostly electrons) and light (mostly lasers and
synchrotrons) with atoms and ions. The results are of importance for the
understanding of fundamental collision dynamics, and they also fulfill
the urgent practical need for accurate atomic data to model the physics
of stars, plasmas, lasers, and planetary atmospheres. Such studies can now
be conducted for realistic systems, as opposed to idealized models. In
particular, it has become possible to describe very complex targets,
such as transition metals and other open-shell systems. Examples include
the excited states of the inert gases beyond helium, as well as neutral
and lowly-ionized iron. These systems are of significant importance
for plasma diagnostics and astrophysics, respectively. The source code
will be made publicly available. A website devoted to user-developer
interaction will be developed and maintained together with the
necessary code documentation and training materials.

## Funding

### Elements: NSCI-Software -- A General and Effective B-Spline R-Matrix Package for Charged-Particle and Photon Collisions with Atoms, Ions, and Molecules

Directorate for Computer & Information Science & Engineering

Find out more...### Photon- and Electron-Driven Atomic Collision Processes: General Theory and Accurate Numerical Calculations

Directorate for Mathematical & Physical Sciences

Find out more...