The Iron Project and the RmaX Project: R‐Matrix Data for Astrophysical and Fusion Applications

The R‐Matrix method has long been employed to compute fundamental atomic parameters with high precision for large scale applications to astrophysical sources and magnetic and intertial fusion devices. Ongoing work is part of two projects: The Iron Project that focuses on Fe‐peak elements, and the RmaX Project aimed at spectral diagnostics of laboratory and astrophysical X‐ray plasmas. The primary atomic processes include electron impact excitation, photoionization, (e + ion) recombination, and spectral transitions. These data are employed in numerical simulations of high‐temperature plasmas under stationary and transient conditions. The calculated paraemeters have been benchmarked against sophisticated experiments on electron‐beam‐ion‐traps for excitation, synchrotron based light sources for photoionization, and heavy ion storage rings for (e + ion) recombination. Extensions of the two projects include a self‐consistent and unified theoretical treatment of (e + ion) recombination that subsumes both the ra...