Low-lying energy levels of ²²⁹Th35+ and the electronic bridge process

2021/05/02 by S. G. Porsev, Porsev, S. G., Charles Cheung +3 · 1 citation
Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic and Subatomic Physics Research #Radioactive Decay and Measurement Techniques

paper · pdf · doi:10.48550/arxiv.2105.00512

Abstract

The nuclear transition between the ground and the low-energy isomeric state in the ²²⁹Th nucleus is of interest due to its high sensitivity to a hypothetical temporal variation of the fundamental constants and a possibility to build a very precise nuclear clock, but precise knowledge of the nuclear clock transition frequency is required. In this work we estimate the probability of an electronic bridge process in ²²⁹Th³5+, allowing to determine the nuclear transition frequency and reduce its uncertainty. Using configuration interaction methods we calculated energies of the low-lying states of Th³5+ and determined their uncertainties.

Cited by

• Theoretical evaluation of decay mode of ^229m Th in solid samples

Related

• The ²²⁹Th Isomer: Nuclear Structure, Clocks, and Tests of Fundamental Physics
• Microscopic nuclear structure study of ²²⁹Th by Projected Shell Model
• Optical transition of the ²²⁹Th nucleus in a solid-state\n environment
• Host-dependent frequency offsets in ²²⁹Th nuclear clockwork
• Nuclear Excitation by Near-Resonant Electron Transition in ²²⁹Th³⁹⁺ Ions