2025/08/21 by Tang, Yong-Bo · 1 citation
#Atomic Physics (physics.atom-ph) #FOS: Physical sciences
paper · doi:10.48550/arxiv.2508.15226
There have been several reported values for the nuclear quadrupole moment of 43Ca, but significant discrepancies exist among these reported values, ranging from \(-0.0408(8)\)~b to \(-0.065(20)\)~b. In this work, we performed an accurate calculation of the electric field gradients of the \(4s4p~3 P1\), \(4s4p~3 P2\) and \(4s3d~1 D2\) states in the 43Ca atom using a hybrid method. This hybrid method integrates the advantages of the configuration interaction method and the coupled-cluster method, and can simultaneously account for core-core, core-valence, and valence-valence correlations. By combining our calculated results with the experimental values of the electric quadrupole hyperfine-structure constants of these three states, an accurate and reliable nuclear quadrupole moment of 43Ca was determined to be \(-0.0479(6)\)~b, which could be recommended as a reference for \(43Ca\).