2009/10/19 by V. V. Flambaum, S. G. Porsev · 1 citation
Chemistry · Decision Sciences · Mathematics · Physics and Astronomy · #Advanced Frequency and Time Standards #Atom (system on chip) #Atomic and Subatomic Physics Research #Atomic physics #Chemistry #Constant (computer programming) #Electronic engineering #Fine-structure constant #Ground state #Ion #Laser #Line (geometry) #Materials science #Mathematics #Nuclear physics #Optics #Physics #Quantum mechanics #Scientific Measurement and Uncertainty Evaluation #Sensitivity (control systems) #Variation (astronomy) #physics.atom-ph
paper · pdf · doi:10.1103/physreva.80.064502
published as Phys. Rev. A 80, 064502 (2009)
arxiv created 2009/10/19 · openalex publication_date 2009/12/08 · arxiv updated 2010/04/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Our calculations have shown that the 5f5/2\text\ensuremath-7s1/2 23 131 cm^\ensuremath-1 transition from the ground state in the ion Th3+ is very sensitive to the temporal variation of the fine-structure constant \ensuremathα=e2/\ensuremathℏc (q=\ensuremath-75 300 cm^\ensuremath-1). The line is very narrow, the ion has been trapped and laser cooled, and the positive shifter line 5f5/2\text\ensuremath-5f7/2 4325 cm^\ensuremath-1 (q=+2900 cm^\ensuremath-1) may be used as a reference. A comparison may also be made with a positive shifter in another atom or ion. This makes Th3+ a good candidate to search for the \ensuremathα variation.