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 5d 6s 2 2Ds, 2-5d 6s 6p 4Fs, 2 has been investigated for the Lu-isotopes Lu I vs and Lu ~ 7,. From our measurements the following values for the hyperfine constants A and B could be deduced Lu lv6 5d6s6p4Fs,2: The isotope shift between the line centers has been determined to be IS(176-175, 605.5 nm) = -420 (10) MHz.

Isotope shift and hyperfine structure of the transition5d6s 2 2 D 3/2-5d6s6p 4 F 3/2 of Lu175 and Lu176

“…The experimental method was the same as in our previous investigation of Lutetium, where the characteristic properties of the apparatus have already been described [4]. In the present investigation laser light of a wavelength of about 573.7 nm was scattered from the atoms of a collimated atomic beam of Lutetium and the scattered resonance light of the same wavelength was used for detection.…”

“…Fortunately a systematic study of the hyperfine (hfs) parameters of several electronic configurations of LuI including configuration mixing has been published recently by Wyart [-2]. The present measurement of the isotope shift and hfs of the 573.7 nm line of Lu is a continuation of our previous study of the 605.5 nm line [4]. Both lines connect the 5d6s220 ground state of the Lu-atom with the 5d6s6p4F excited state, the 573.7 nm line corresponding to the transition between the states 2D3/2 and 4F3/2.…”

Laser spectroscopy investigation of the nuclear moments and radii of lutetium isotopes

“…Moreover, they provide valuable complementary information on the nuclear mean square charge radii which is obtained from the isotope (isomer) shifts. Previously, optical isotope shift measurements had been restricted to the naturally occuring isotopes 175 Lu and 176 Lu [9,10].…”