• DOI:10.1103/PhysRevLett.98.142501
Corpus ID: 12092700

Energy splitting of the ground-state doublet in the nucleus 229Th.

@article{Beck2007EnergySO,
  title={Energy splitting of the ground-state doublet in the nucleus 229Th.},
  author={Bret Robert Beck and John A. Becker and P Beiersdorfer and Gregory V. Brown and Kenton J. Moody and Jerry B. Wilhelmy and Frederick Scott Porter and Caroline A. Kilbourne and Richard Lloyd Kelley},
  journal={Physical review letters},
  year={2007},
  volume={98 14},
  pages={
          142501
        }
}

Bret Robert Beck, John A. Becker, +6 authors Richard Lloyd Kelley

Published in Physical review letters 2007

Physics, Medicine

The energy splitting of the 229Th ground-state doublet is measured to be 7.6+/-0.5 eV, significantly greater than earlier measurements. Gamma rays produced following the alpha decay of 233U (105 muCi) were counted in the NASA/electron beam ion trap x-ray microcalorimeter spectrometer with an experimental energy resolution of 26 eV (FWHM). A difference technique was applied to the gamma-ray decay of the 71.82 keV level that populates both members of the doublet. A positive correction amounting… CONTINUE READING

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