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 Wigner Crystals of 229Th for Optical Excitation of the Nuclear Isomer


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We have produced laser-cooled Wigner crystals of 229Th3+ in a linear Paul trap. The magnetic dipole A and electric quadrupole B hyperfine constants for four low-lying electronic levels and the relative isotope shifts with respect to 232Th3+ for three low-lying optical transitions are measured. Using the hyperfine B constants in conjunction with prior atomic structure calculations, a new value of the spectroscopic nuclear electric quadrupole moment Q = 3.1116 eb is deduced. These results are a step towards optical excitation of the low-lying isomer level in the 229Th nucleus.



Autor: C. J. Campbell; A. G. Radnaev; A. Kuzmich

Fuente: https://archive.org/



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