Exponential Increase of Energy Level Density in Atoms: Th and Th II

2010/03/24 by V. A. Dzuba, V. V. Flambaum · 3 citations
Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic and Molecular Physics #Cold Atom Physics and Bose-Einstein Condensates #physics.atom-ph

paper · pdf · doi:10.1103/physrevlett.104.213002

published as Phys. Rev. Lett. 104, 213002 (2010) · 4 pages, 1 figure, 3 tables.

arxiv created 2010/03/24 · openalex publication_date 2010/05/28 · arxiv updated 2015/05/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present analytical estimates and numerical calculations showing that the energy level density in open-shell atoms increases exponentially with the increase of excitation energy. As an example, we use the relativistic Hartree-Fock and configuration interaction methods to calculate the density of states of Th and Th II. The result is used to estimate the effect of electrons on the nuclear transition which is considered for the nuclear clock.

Citations

• Correlation Effects in Atoms

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