Precision measurement of the hyperfine structure of Lu175 with the atomic beam magnetic resonance method

Abstract

The hyperfine structure separations of both doublet states2D3/2 and2D5/2 of the ground state configuration 6s2 5d of Lu175 have been remeasured with high precision using the atomic beam magnetic resonance method. Magnetic dipole transitions between Zeeman components of the hfs levels were induced applying Ramsey's technique of separated oscillatory fields whenever the field dependence of the resonances was small enough. The hfs intervals at zero field and hfs interaction constants were derived from the measurements. The constants were then corrected for hfs perturbations between the two levels of the doublet. Configuration interaction has been taken into account for the calculation of the dipole matrix elements. The corrected hfs constants are:J=3/2:A=194.332921 (300) MHzB=1511.396 267 (320) MHzC=−70 (19) HzJ=5/2:A=146.776 472 (138) MHzB=1860.656132 (840) MHzC=913 (162) HzD=−16 (24) Hz A quadrupole hfs anomaly between Lu175 and Lu176m was not found when comparing the following two ratios: Lu175:B(5/2)/B(3/2)=1.2310850 (16) Lu176m:B(5/2)/B(3/2)=1.2310818 (30).