Impact of the ionization of the atomic shell on the lifetime of the 229mTh isomer

Abstract

Recent experimental data are analyzed, concerning the half-lives of the 229mTh isomer in neutral atoms and various ions. Calculation is performed on the united platform of interplay of traditional and subthreshold resonance conversion. General agreement with experiment is obtained in the cases of Th I and Th III, a prediction is made concerning half-life in Th IV. Most critical is the case of Th II, where experimental data can be explained by interplay of various factors. A new physics is proposed, based on dependence of the nuclear lifetime on the ambient conditions, such as atmospheric pressure. This must be taken into account in future experiments and their interpretation.

17 pages, 4 tables. arXiv admin note: substantial text overlap with arXiv:1701.05340

References in corpus (3)

• Direct detection of the 229Th nuclear clock transition
• Lifetime measurement of the ${}^{229}$Th nuclear isomer
• Enhancement of the Deuteron-Fusion Reactions in Metals and its Experimental Implications

Cited by in corpus (6)

• Energy of the ${}^{229}$Th nuclear clock transition
• The ${}^{229}$Th isomer: prospects for a nuclear optical clock
• Expanding Nuclear Physics Horizons with the Gamma Factory
• Electronic level structure of ${\mathrm{Th}}^{+}$ in the range of the ${}^{229m}\mathrm{Th}$ isomer energy
• A proposed solution for the lifetime puzzle of the 229mTh+ isomer
• Theoretical evaluation of decay mode of ${}^{229m}\mathrm{Th}$ in solid samples