Triplet-state transitions in beryllium: Accurate energies and oscillator strengths
Nasiri S. Adamowicz L. Bubin S.
4 December 2025American Physical Society
Physical Review A
2025#112Issue 6
We present highly accurate variational calculations of triplet excited states of the beryllium atom using all-electron explicitly correlated Gaussian basis sets. The employed approach that treats the electrons and the nucleus on the same footing enables precise determination of the energy spectrum, wave functions, and transition properties of low-lying 3Se and 3Postates of the naturally occurring 9Be isotope and the model ∞Be system. Benchmark-quality total and transition energies, as well as oscillator strengths determined in both the length and velocity gauges, are reported. The results are compared with available theoretical and experimental data. The comparison shows excellent agreement of the present results with the experiment. They also provide refinement for the values where discrepancies had existed before.
Text of the article Перейти на текст статьи
Department of Physics, Nazarbayev University, Astana, 010000, Kazakhstan
Department of Chemistry and Biochemistry, University of Arizona, Tucson, 85721, AZ, United States
Department of Physics, University of Arizona, Tucson, 85721, AZ, United States
Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, Oslo, N-0315, Norway
Department of Physics
Department of Chemistry and Biochemistry
Department of Physics
Hylleraas Centre for Quantum Molecular Sciences
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026