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Resonance Conversion as the Predominant Decay Mode of \(^{229m}\)Th

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Abstract

Calculations performed within the advanced MCDF method show that the probability of decay of the 3.5-eV level of \(^{229m}\)Th through the resonance electronic bridges exceeds the direct radiative nuclear decay width by a factor of around \(5\cdot 10^3\). Experimental consequences for detection of the delayed soft photons or \(\alpha\) particles from the decay of the isomer are discussed.

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Authors and Affiliations

  1. Fock Institute of Physics, St. Petersburg State University, 198504, St. Petersburg, Russia

    F. F. Karpeshin

  2. Petersburg Nuclear Physics Institute, Gatchina, Leningrad district, 188300, St. Petersburg, Russia

    M. B. Trzhaskovskaya

Authors
  1. F. F. Karpeshin
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  2. M. B. Trzhaskovskaya
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Correspondence to F. F. Karpeshin.

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Karpeshin, F.F., Trzhaskovskaya, M.B. Resonance Conversion as the Predominant Decay Mode of \(^{229m}\)Th. Hyperfine Interact 162, 125–132 (2005). https://doi.org/10.1007/s10751-005-9213-1

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  • DOI: https://doi.org/10.1007/s10751-005-9213-1

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