Internal conversion from excited electronic states of ${}^{229}\mathrm{T}h$ ions

Abstract

The process of internal conversion from excited electronic states is investigated theoretically for the case of the vacuum-ultraviolet nuclear transition of ${}^{229}\mathrm{T}h$. Due to the very low transition energy, the ${}^{229}\mathrm{T}h$ nucleus offers the unique possibility to open the otherwise forbidden internal conversion nuclear decay channel for thorium ions via optical laser excitation of the electronic shell. We show that this feature can be exploited to investigate the isomeric state properties via observation of internal conversion from excited electronic configurations of ${\mathrm{T}h}^{+}$ and ${\mathrm{T}h}^{2+}$ ions. A possible experimental realization of the proposed scenario at the nuclear laser spectroscopy facility IGISOL in Jyväskylä, Finland is discussed.

arXiv comment10 pages, 5 figures, 6 tables

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Cited by in corpus (13)

• Energy of the ${}^{229}$Th nuclear clock transition
• Reduced transition probabilities for the gamma decay of the 7.8 eV isomer in ${}^{229}$Th
• The ${}^{229}$Th isomer: prospects for a nuclear optical clock
• ${}^{93m}$Mo isomer depletion via beam-based nuclear excitation by electron capture
• Recent progress in laser spectroscopy of the actinides
• Excitation of ${}^{229m}$Th at Inelastic Scattering of Low Energy Electrons
• Laser-induced electronic bridge for characterization of the ${}^{229\mathrm{m}}\mathrm{Th}\to {}^{229\mathrm{g}}\mathrm{Th}$ nuclear transition with a tunable optical laser
• Nuclear Excitation by Electron Capture in Excited Ions
• The electric quadrupole channel of the 7.8 eV ${}^{229}\mathrm{Th}$ transition
• Theory of internal conversion of the thorium-229 nuclear isomer in solid-state hosts
• Internal conversion of the low energy ${}^{229m}$Th isomer in the Thorium anion
• Lifetime of the singly charged ${}^{229}$Th nuclear isomer
• Proposal for a Nuclear Light Source