Investigation of hyperfine structure and isotope shift of the 605.5 nm-line of Lu176 by laser spectroscopy

Abstract

Using a tunable single mode dye laser the hyperfine structure of the transition 5d6s 2 2 D 5/2 — 5d6s6p 4 F 5/2 has been investigated for the Lu-isotopes Lu175 and Lu176. From our measurements the following values for the hyperfine constantsA andB could be deduced Lu176 5d6s6p 4 F 5/2:A=698.4 (0.4) MHz,B=1,564 (10) MHz 5d6s 2 2 D 5/2:A=104.1 (0.3) MHz.B=2,631 (6) MHz Lu175 5d6s6p 4 F 5/2:A=987.2(0.4) MHz,B=1,117(6) MHz. The isotope shift between the line centers has been determined to be IS(176-175, 605.5 nm)=−420(10) MHz.