NSF PAR Search | NSF Public Access Repository

Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher. Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?

Some links on this page may take you to non-federal websites. Their policies may differ from this site.

Theory of Internal Conversion of the ${}^{229}{Th}$ Nuclear Isomer in Solid-State Hosts

https://doi.org/10.1103/9s8f-hv1f

Morgan, H. W. T.; Tran_Tan, H. B.; Elwell, R.; Alexandrova, A. N.; Hudson, Eric_R; Derevianko, Andrei (June 2025, Physical Review Letters)
Proposal and theoretical investigation of 229Th-doped nonlinear optical crystals for compact solid-state clocks

https://doi.org/10.1063/5.0247867

Morgan, H_W T; Elwell, R; Terhune, J_E S; Tran_Tan, H B; Perera, U C; Derevianko, A; Alexandrova, A N; Hudson, E R (March 2025, Applied Physics Letters)

The recent laser excitation of the 229Th isomeric transition in a solid-state host opens the door for a portable solid-state nuclear optical clock. However, at present, the vacuum-ultraviolet laser systems required for clock operation are not conducive to a fieldable form factor. Here, we propose a possible solution to this problem by using 229Th-doped nonlinear optical crystals, which would allow clock operation without a vacuum-ultraviolet laser system and without the need of maintaining the crystal under vacuum. We investigate electronic properties and thorium doping in BaMgF4 and BaZnF4 with density functional theory, predicting BaMgF4 to be the superior material, and evaluate the performance of a Th:BaMgF4 clock.
more » « less
Free, publicly-accessible full text available March 1, 2026
229ThF4 thin films for solid-state nuclear clocks

https://doi.org/10.1038/s41586-024-08256-5

Zhang, Chuankun; von_der_Wense, Lars; Doyle, Jack F; Higgins, Jacob S; Ooi, Tian; Friebel, Hans U; Ye, Jun; Elwell, R; Terhune, J_E S; Morgan, H_W T; et al (December 2024, Nature)

Free, publicly-accessible full text available December 19, 2025
Laser Excitation of the ${}^{229}{Th}$ Nuclear Isomeric Transition in a Solid-State Host

https://doi.org/10.1103/PhysRevLett.133.013201

Elwell, R.; Schneider, Christian; Jeet, Justin; Terhune, J. E. S.; Morgan, H. W. T.; Alexandrova, A. N.; Tran_Tan, H. B.; Derevianko, Andrei; Hudson, Eric_R (July 2024, Physical Review Letters)

Search for: All records