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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A two-step, two-color laser spectroscopy technique has been used to measurethe hyperfine splitting of the 7p$_{1/2}$ excited state in $^{203}$Tl and$^{205}$Tl, as well as the isotope shift within the 7s$_{1/2}$ - 7p$_{1/2}$transition. Our measured values for the hyperfine splittings, 2153.2(7) MHz (in$^{203}$Tl) and 2173.3(8) MHz (in $^{205}$Tl), each differ by 20 MHz frompreviously published values which quoted comparable precision. The transitionisotope shift of $^{203}$Tl relative to $^{205}$Tl was measured to be 534.4(9)MHz. In our experiment, one laser was locked to the thallium ground-state6p$_{1/2}$ - 7s$_{1/2}$ 378 nm transition, while the second, spatiallyoverlapping laser was scanned across the 7s$_{1/2}$(F=1) - 7p$_{1/2}$(F=0,1)hyperfine transitions. To facilitate accurate frequency calibration,radio-frequency modulation of the laser was used to create sidebands in theabsorption spectrum.

Measurement of 7p$_{1/2}$-state hyperfine structure and 7s$_{1/2}$-7p$_{1/2}$ transition isotope shift in $^{203}$Tl and $^{205}$Tl