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={B. Beck and J. Becker and P. Beiersdorfer and G. Brown and K. Moody and J. Wilhelmy and F. Porter and C. Kilbourne and R. Kelley},
  journal={Physical review letters},
  year={2007},
  volume={98 14},
  pages={
          142501
        }
}
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… Expand
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Feasibility study of internal conversion electron spectroscopy of 229mTh
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