On the Direct Detection of 229m Th

  • Lars┬áVon der Wense

Part of the Springer Theses book series (Springer Theses)

Table of contents

  1. Front Matter
    Pages i-xix
  2. Lars Von der Wense
    Pages 1-13
  3. Lars Von der Wense
    Pages 15-49
  4. Lars Von der Wense
    Pages 51-86
  5. Lars Von der Wense
    Pages 87-129
  6. Lars Von der Wense
    Pages 131-161
  7. Lars Von der Wense
    Pages 163-168
  8. Back Matter
    Pages 169-224

About this book


This thesis describes the first detection of a nuclear transition that had been sought for 40 years, and marks the essential first step toward developing nuclear clocks.

Atomic clocks are currently the most reliable timekeepers. Still, they could potentially be outperformed by nuclear clocks, based on a nuclear transition instead of the atomic transitions employed to date. An elusive, extraordinary state in thorium-229 seems to be the only nuclear transition suitable for this purpose and feasible using currently available technology. Despite repeated efforts over the past 40 years, until recently we had not yet successfully detected the decay of this elusive state.

Addressing this gap, the thesis lays the foundation for the development of a new, better frequency standard, which will likely have numerous applications in satellite navigation and rapid data transfer. Further, it makes it possible to improve the constraints for time variations of fundamental constants and opens up the field of nuclear coherent control.


Nuclear Clock Nuclear Laser Spectrosocopy Thorium 229 Nuclear Isomer Atomic Clock Direct Detection of 229mTh Frequency Standards

Authors and affiliations

  • Lars┬áVon der Wense
    • 1
  1. 1.Department of Medical PhysicsLudwig-Maximilians-UniversityGarching, BavariaGermany

Bibliographic information