2023/11/04 by Li, Fei-Chen, Tang, Yong-Bo
#Atomic Physics (physics.atom-ph) #FOS: Physical sciences
paper · doi:10.48550/arxiv.2311.02285
The refined values of the magnetic octupole moments of 113In and 115In are obtained by combining high-precision atomic calculations with corresponding hyperfine structure spectrum. We performed an ab initio calculations of hyperfine-structure properties for the low-lying states of In atom using the single and double approximated relativistic coupled-cluster method. The hyperfine-structure properties includes first-order hyperfine-structure constants and the second-order magnetic dipole-magnetic dipole, magnetic dipole-electric quadrupole, and electric quadrupole-electric quadrupole effects caused by the off-diagonal hyperfine interaction. Based on our theoretical results, we reanalyze the previously measurements of hyperfine splitting in the 5p3/2 state of 113In and 115In [Eck and Kusch, Phys. Rev. 106, 958 (1957)], determining corresponding hyperfine-structure constants A, B, and C. By combining these undated HFS constants and our theoretical results, the magnetic octupole moments of 113In and 115In nuclei are extracted to be Ω(113\rm In)=0.455(44)~\mathrmμN× b , and Ω(115\rm In)=0.443(42)~\mathrmμN× b, respectively. The refined values of magnetic octupole moments are about smaller 21% than the previously reported results by Eck and Kusch [Phys. Rev. 106, 958 (1957)]. Additionally, we also determine the electric quadrupole moment of 115In nuclei to be Q(115\rm In)=0.767(9) b by combining our theoretical results and the measured values for hyperfine-structure constants of the 5p3/2 and 6p3/2 states. Our results are compared with available experimental and theoretical results.