On calculations of metastable and Rydberg states of diatomic beryllium molecule and antiprotonic helium atom

V. L. Derbov; G. Chuluunbaatar; A. A. Gusev; O. Chuluunbaatar; S. I. Vinitsky; A. Góźdź; P. M. Krassovitskiy; A. V. Mitin

doi:10.1117/12.2565816

9 April 2020 On calculations of metastable and Rydberg states of diatomic beryllium molecule and antiprotonic helium atom

V. L. Derbov, G. Chuluunbaatar, A. A. Gusev, O. Chuluunbaatar, S. I. Vinitsky, A. Góźdź, P. M. Krassovitskiy, A. V. Mitin

Author Affiliations +

Proceedings Volume 11458, Saratov Fall Meeting 2019: Laser Physics, Photonic Technologies, and Molecular Modeling; 114580Q (2020) https://doi.org/10.1117/12.2565816
Event: Saratov Fall Meeting 2019: VII International Symposium on Optics and Biophotonics, 2019, Saratov, Russian Federation

Abstract

The computational scheme and calculation results of bound, metastable and Rydberg states of atomic and molecular systems important for laser spectroscopy are presented. The solution to the problem is performed using the authors' software package (see program libraries of the Computer Physics Communications journal and of the Joint Institute for Nuclear Research) that implement the high-accuracy finite element method. The FORTRAN procedure of matching tabulated potential functions with van der Waals asymptotic potential using interpolation Hermite polynomials which provides continuity of both the function itself and its derivative is presented. The efficiency of the proposed approach is demonstrated by calculated for the first time sharp metastable states with complex eigen-energies in a diatomic beryllium molecule and weakly bound Rydberg states of antiprotonic helium atom.

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V. L. Derbov, G. Chuluunbaatar, A. A. Gusev, O. Chuluunbaatar, S. I. Vinitsky, A. Góźdź, P. M. Krassovitskiy, and A. V. Mitin "On calculations of metastable and Rydberg states of diatomic beryllium molecule and antiprotonic helium atom", Proc. SPIE 11458, Saratov Fall Meeting 2019: Laser Physics, Photonic Technologies, and Molecular Modeling, 114580Q (9 April 2020); https://doi.org/10.1117/12.2565816

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