2021/03/14 by Fei-Chen Li, Li, Fei-Chen, Yongbo Tang +5
Chemistry · Physics and Astronomy · #Advanced Chemical Physics Studies #Atomic Physics (physics.atom-ph) #Atomic and Molecular Physics #FOS: Physical sciences #Inorganic Fluorides and Related Compounds
paper · pdf · doi:10.48550/arxiv.2103.07928
openalex publication_date 2021/03/14 · openalex created_date 2021/03/29 · openalex updated_date 2026/07/28
Hyperfine-structure constants of odd Ra+ due to the interactions of nuclear magnetic dipole, electric quadrupole, and magnetic octupole moments with the electrons are investigated in the framework of relativistic coupled-cluster method within single- and double-excitation approximation. The calculated energies and magnetic dipole hyperfine-structure constants A exhibit a good agreement with available experimental values. Combining with the experimental electric quadrupole hyperfine-structure constant, we also extracted the electric quadrupole moments Q of 209,211,221,223Ra. Our Q(221Ra) and Q(223Ra) are consistent with the referenced values from a semi-empirical analysis (Z. Phys. D: At., Mol. Clusters 11, 105 (1988)), but Q(211Ra)=0.33(2) is smaller than the referenced value 0.48(4) by about 30%. Furthermore, we also performed a procedure for assessing the contributions of magnetic octupole moment to the hyperfine splitting. The sensitivity of hyperfine-structure interval measurements in 223Ra+ that can reveal the effect caused by the nuclear octupole moment are found to be on the order of kHz.