Eur. Phys. J. Plus (2017) 132: 455
https://doi.org/10.1140/epjp/i2017-11725-0

Regular Article

Construction of the energy matrix for complex atoms

Part VIII: Hyperfine structure HPC calculations for terbium atom

¹ Institute of Materials Research and Quantum Engineering, Faculty of Technical Physics, Poznan University of Technology, Piotrowo 3, 60-965, Poznań, Poland
² Institute of Control, Robotics and Information Engineering, Faculty of Electrical Engineering, Poznan University of Technology, Piotrowo 3A, 60-965, Poznań, Poland

^* e-mail: magdalena.elantkowska@put.poznan.pl

Received: 10 August 2017
Accepted: 28 September 2017
Published online: 3 November 2017

Abstract

A parametric analysis of the hyperfine structure (hfs) for the even parity configurations of atomic terbium (Tb I) is presented in this work. We introduce the complete set of 4f^N-core states in our high-performance computing (HPC) calculations. For calculations of the huge hyperfine structure matrix, requiring approximately 5000 hours when run on a single CPU, we propose the methods utilizing a personal computer cluster or, alternatively a cluster of Microsoft Azure virtual machines (VM). These methods give a factor 12 performance boost, enabling the calculations to complete in an acceptable time.