Abstract
The high resolution laser-atomic-beam technique was used to investigate the hyperfine structure in Nd I 4f 46s 2 5 I,5 F,5 S and 4f 45d6s 7 L,7 K,7 I,7 H. The metastable states were populated by an arc discharge burning in the atomic beam. The measured hyperfine constantsA andB of the levels of 4f 46s 2 and 4f 45d6s allow a parametric analysis to be performed using the effective tensor operator formalism. The experimental radial integrals of the 4f and 5d electrons fit with those of the other lanthanides. The 4f radial integrals are in agreement with values of optimized Hartree-Fock-Slater calculations. The spectroscopic quadrupole moments of143Nd and145Nd are deduced from the 4f parameters:Q I =−0.610(21) b and −0.314(12) b, respectively. TheQ I resulting from the 5d parameter are in satisfactory agreement with these values. The hyperfine anomaly due to thes electron in 4f 45d 6s amounts to about 1%.
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Aufmuth, P., Bernard, A., Deckwer, M. et al. Hyperfine structure in the configurations4f 4 6s 2 and4f 4 5d 6s of Nd I. Z Phys D - Atoms, Molecules and Clusters 23, 19–27 (1992). https://doi.org/10.1007/BF01436698
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DOI: https://doi.org/10.1007/BF01436698