Towards a measurement of the nuclear clock transition in 229Th

Simon Stellmer, Matthias Schreitl, Georgy Kazakov, Koji Yoshimura, Thorsten Schumm

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


We investigate a potential candidate for a future optical clock: the nucleus of the isotope 229Th. Over the past 40 years of research, various experiments have found evidence for the existence of an isomeric state at an energy of a few eV. So far, neither the energy nor the lifetime of the isomer have been determined directly. As the scene is not yet prepared for direct laser excitation, other means of populating the isomer need to be explored. We investigate three different approaches, all of which rely on CaF2 crystals doped with 229Th or 233U. Various kinds of crystal luminescence are discussed in detail.

Original languageEnglish
Article number012059
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - Jul 4 2016
Event8th Symposium on Frequency Standards and Metrology 2015 - Potsdam, Germany
Duration: Oct 12 2015Oct 16 2015

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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