Hyperfine Structure of the Spectrum of Pr II

抄録

Analysis of the hyperfine structure of the term 4f³(⁴I)6_s of Pr II resulted a(6_s)=0.426 cm⁻¹, a_4f=0.0227 cm⁻¹. From the value of a(6_s) the nuclear magnetic moment of Pr was deduced to be μ=+4.0 n.m., in agreement with the value given in the literature. From the value of a_4f the screening constant σ of the 4f electron was deduced to be 32.9. The quadrupole moment of Pr was found to be Q=(0.0±0.2)×10⁻²⁴ cm². This is in agreement with the value Q=−0.05×10⁻²⁴ cm² calculated from the data published by Lew regarding the hyperfine structure of the ground term of Pr I.