Spin–other–orbit interaction in configurations with $p$ and $h$ electrons in outer shells. Exchange matrix elements

Using modern methods of theoretical atomic spectroscopy, it is possible to perform calculations of atomic systems which are necessary in solving practical problems in various areas of physics, in particular, in astrophysics. For this purpose, different purely theoretical (ab initio) have been used, including methods developed recently. In calculations of atomic systems, along with the ab initio methods, different variants of the semiempirical method are also employed.