@ARTICLE{,
  author = {von der Wense, Lars C. and Seiferle, Benedict and Schneider, Christian and Jeet, Justin and Amersdorffer, Ines and Arlt, Nicolas and Zacherl, Florian and Haas, Raphael and Renisch, Dennis and Mosel, Patrick and Mosel, Philip and Kovacev, Milutin and Morgner, Uwe and D\"{u}llmann, Christoph E. and Hudson, Eric R. and Thirolf, Peter G.},
  title = {The concept of laser-based conversion electron {M}\"{o}ssbauer spectroscopy for a precise energy determination of \textsuperscript{229m}{Th}},
  journal = {Hyperfine Interact.},
  year = {2019},
  volume = {240},
  number = {1},
  pages = {23},
  month = {mar},
  url = {https://doi.org/10.1007/s10751-019-1564-0},
  doi = {10.1007/s10751-019-1564-0},
  abstract = {$^{229}$Th is the only nucleus currently under investigation for the development of a nuclear optical clock (NOC) of ultra-high accuracy. The insufficient knowledge of the first nuclear excitation energy of $^{229}$Th has so far hindered direct nuclear laser spectroscopy of thorium ions and thus the development of a NOC. Here, a nuclear laser excitation scheme is detailed, which makes use of thorium atoms instead of ions. This concept, besides potentially leading to the first nuclear laser spectroscopy, would determine the isomeric energy to $40 \mu \text{eV}$ resolution, corresponding to $10 \text{GHz}$, which is a $10^4$ times improvement compared to the current best energy constraint. This would determine the nuclear isomeric energy to a sufficient accuracy to allow for nuclear laser spectroscopy of individual thorium ions in a Paul trap and thus the development of a single-ion nuclear optical clock.}
}