English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We report absolute frequency measurements of the molecular iodine P(46) 5-4$a_{1}$, $a_{10}$, and $a_{15}$ hyperfine transitions at 647 nm with afiber-based frequency comb. The light source is based on a Littrow-typeexternal-cavity diode laser. A frequency stability of 5 $\times$ 10$^{-12}$ ata 200 s integration time is achieved when the light source is stabilized to theP(46) 5-4 $a_{15}$ line. The pressure shift is determined to be -8.3(7) kHz/Pa.Our determination of the line centers reached a precision of 21 kHz. The lightsource can serve as a reference laser for lithium atom spectroscopy ($2P \to3P$).

Absolute frequency measurement of molecular iodine hyperfine transitions at 647 nm