Extreme-ultraviolet laser metrology of OI transitions

Details Extreme-ultraviolet laser metrology of OI transitions Extreme-ultraviolet laser metrology of OI transitions

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mnras.389l...4i&link_type=abstract

Monthly Notices of the Royal Astronomical Society: Letters, Volume 389, Issue 1, pp. L4-L7.

Astronomy and Astrophysics

Astronomy

2

Atomic Data, Methods: Laboratory, Techniques: Spectroscopic, Quasars: Absorption Lines, Ultraviolet: General

Scientific paper

Some 16 transitions in atomic oxygen originating from its 3P ground state were measured using a tunable narrow-band extreme-ultraviolet laser source, with an unprecedented accuracy of Δλ/λ = 8 × 10-8. The results are relevant for comparisons with spectral absorption features observed in the line of sight of quasars, in order to test a possible variation of the fine-structure constant α on a cosmological time-scale.

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