Measurement of the $^{20-22}$Ne $^3$P$_2$-$^3$D$_3$ transition isotope   shift using a single, phase modulated laser beam
  We develop a simple technique to accurately measure frequency differences between far lying resonances in a spectroscopy signal using a single laser. This technique was used to measure the isotope shift of the cooling transition of metastable neon for the result of $1626.264(79)$ MHz. The most accurate determination of this value to date. 
Ben Ohayon, Gal Gumpel, Guy Ron
physics.optics nucl-ex physics.atom-ph