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Direct detection of the 229Th nuclear clock transition
- L. Wense, B. Seiferle, P. Thirolf
- PhysicsNature
- 5 May 2016
The direct detection of this nuclear state of 229mTh is reported, which is further confirmation of the existence of the isomer and lays the foundation for precise studies of its decay parameters.
On the Direct Detection of 229m Th
- L. Wense
- Physics
- 22 December 2017
Measurements are described that have led to the direct detection of the isomeric first excited state of the thorium-229 nucleus.
Energy of the 229Th nuclear clock transition
- B. Seiferle, L. Wense, P. Thirolf
- PhysicsNature
- 10 May 2019
The method combines nuclear and atomic physics measurements to advance precision metrology, and the findings are expected to facilitate the application of high-resolution laser spectroscopy on nuclei and to enable the development of a nuclear optical clock of unprecedented accuracy.
Laser spectroscopic characterization of the nuclear-clock isomer 229mTh
- J. Thielking, M. Okhapkin, E. Peik
- PhysicsNature
- 15 September 2017
The laser spectroscopic investigation of the hyperfine structure of the doubly charged 229mTh ion and the determination of the fundamental nuclear properties of the isomer, namely, its magnetic dipole and electric quadrupole moments, as well as its nuclear charge radius are presented.
Determination of the extraction efficiency for 233U source α-recoil ions from the MLL buffer-gas stopping cell
- L. Wense, B. Seiferle, M. Laatiaoui, P. Thirolf
- Physics
- 6 March 2015
Following the α decay of 233U, 229Th recoil ions are shown to be extracted in a significant amount from the MLL buffer-gas stopping cell. The produced recoil ions and subsequent daughter nuclei are…
Towards a 229Th-Based Nuclear Clock
- L. Wense, B. Seiferle, P. Thirolf
- Physics
- 12 March 2018
An overview of the current status of the development of a nuclear clock based on the state of lowest known nuclear excitation energy in 229Th is presented and potential candidates for nuclear clocks other than 229Th are discussed.
The $$^{229}$$Th isomer: prospects for a nuclear optical clock
- L. Wense, B. Seiferle
- Physics
- 28 September 2020
The proposal for the development of a nuclear optical clock has triggered a multitude of experimental and theoretical studies. In particular the prediction of an unprecedented systematic frequency…
Towards a direct transition energy measurement of the lowest nuclear excitation in229Th
- L. Wense, P. Thirolf, D. Kalb, M. Laatiaoui
- Physics
- 4 November 2012
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…
Towards a precise determination of the excitation energy of the Thorium nuclear isomer using a magnetic bottle spectrometer
- B. Seiferle, L. Wense, I. Amersdorffer, Nicolas Arlt, Benjamin Kotulski, P. Thirolf
- PhysicsNuclear Instruments and Methods in Physics…
- 11 December 2018
Concepts for direct frequency-comb spectroscopy of $^{229\text{m}}$Th
- L. Wense, Chuankun Zhang
- Physics
- 16 May 2019
Direct laser spectroscopy of $^{229\text{m}}$Th was already discussed back in the 1990s, followed by the proposal for a nuclear optical clock in 2003. However, it was not until very recently that the…
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