Measurement of the transition wavelengths of the lithium resonance lines

Abstract

Abstract. Using laser-atomic-beam spectroscopy and a highly precise lambdameter, we have determined the transition wavelengths of the lithium resonance lines to be: 6Li D,: 6707.0704 (5)

Fourier-transform-spectroscopy measurements in the spectra of neutral lithium,I6andRadziemski1, Engleman2, Brault3 1995Phys. Rev. A959780View full textAdd to dashboardCite

“…However, their values disagree by 10 cm ' from accepted values.More recently Windholz and Umfer[18]reported results using a laser-excited atomic beam coupled with a wavemeter. Their values were in disagreement with Ref [10].…”

Re-measurement of the transition frequencies, fine structure splitting and isotope shift of the resonance lines of lithium, sodium and potassium

“…There was some disagreement in values of the transition frequencies of the lithium resonance lines reported in our papers [1,2] and by other groups [3][4][5]. In order to clear up this disagreement we repeated investigations of the 6, 7Li D1 and Dz lines.…”

“…Therefore the laser reference frequency given in [-12 has to be multiplied by 1.000001109, the frequency gi'een in [2] by 1.000001013 in order to get correct referen~ frequencies. In [1] and [2] the measurements were performed in air, so we needed dispersion formulas to convert the measured wavelengths into vacuum wavelengths, and therefore the accuracy was not as high as in the present investigation. …”

“…The reference laser used is a polarisation-stabilized single-mode He-Ne laser (Coherent Tropel 200) whose frequency has previously assumed to be 473 611920(30)MHz [1] respectively 473611965(30)MHz [2]. For a determination of the reference laser frequency we recorded saturation absorption spectra of 12vI2 molecules on two metrological transitions: 21 = 576 nm, 12712 P(62) 17-1 and 22 = 633 nm, 1z~I2 P(33) 6-3, using our tunable ring dye laser.…”