Towards a direct transition energy measurement of the lowest nuclear excitation in 229Th

@article{Wense2013TowardsAD,
  title={Towards a direct transition energy measurement of the lowest nuclear excitation in 229Th},
  author={L v d Wense and P G Thirolf and D Kalb and M Laatiaoui},
  journal={Journal of Instrumentation},
  year={2013},
  volume={8},
  pages={P03005 - P03005}
}
The isomeric first excited state of the isotope 229Th exhibits the lowest nuclear excitation energy in the whole landscape of known atomic nuclei. For a long time this energy was reported in the literature as 3.5(5) eV, however, a new experiment corrected this energy to 7.6(5) eV, corresponding to a UV transition wavelength of 163(11) nm. The expected isomeric lifetime is τ = 3-5 hours, leading to an extremely sharp relative linewidth of ΔE/E ≈ 10−20, 5-6 orders of magnitude smaller than… 

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  • Physics
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  • 2017
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