The Library of Subroutines for Calculation of Matrix Elements of Two–particle Operators for Many–Electron Atoms
نویسنده
چکیده
In this paper a library for spin–angular integration in LS–coupling for many–electron atoms is presented. The software is an implementation of a methodology based on the second quantization in coupled tensorial form, the angular momentum theory in 3 spaces (orbital, spin and quasispin), and the graphical technique of angular momentum. This implementation extends applications of the relevant methodology to open f– shells and leads to faster execution of angular integration codes. The possibility of using some library routines for solving various angular momentum problems in atomic physics is also discussed. PACS: 31.15.Ne, 31.25.-v, 32.10.-f, 32.30.-r
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