Abstract The radioisotope thorium-229 (229Th) is renowned for its extraordinarily low-
energy, long-lived nuclear first-excited state. This isomeric state can be excited by vacuum …

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 …

The low-energy, long-lived isomer in 229 Th, first studied in the 1970s as an exotic feature in
nuclear physics, continues to inspire a multidisciplinary community of physicists. It has …

The metastable first excited state of thorium-229, 229mTh, is just a few electronvolts above
the nuclear ground state,,–and is accessible by vacuum ultraviolet lasers. The ability to …

Today's most precise timekeeping is based on optical atomic clocks. However, those could
potentially be outperformed by a nuclear clock, based on a nuclear transition instead of an …

This paper presents an absolute X-ray photon energy measurement method that uses a
Bond diffractometer. The proposed system enables the prompt and rapid in situ …

Der Isomerzustand des Thoriumisotops 229Th ist der niedrigste bekannte angeregte
Kernzustand und ist daher ein vielversprechender Kandidat für Präzisionstests der …

The first excited isomeric state of Th-229 has an exceptionally low energy of only a few eV
and could form the gateway to high-precision laser spectroscopy of nuclei. The excitation …

This paper presents a phenomenological analysis of thermodynamic parameters of a pulsed
supersonic gas jet in a conical nozzle. Conditions have been found out for the condensation …

The 229Th nucleus with its 7.8 eV isomeric state is a unique candidate for the first nuclear
optical clock at an exceptional accuracy of 10− 19. Due to the low isomeric transition energy …