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An experimental investigation of the 15.1 keV M1 + E2 nuclear transition in 227Th from the \(\beta^{-}\) decay of 227Ac

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Abstract.

Using the internal conversion electron spectroscopy, the energy of the 15.1 keV \( M1+E2\) nuclear transition in 227Th populated in the \( \beta^{-}\) decay of 227Ac was determined to be \( 15098.6 \pm 1.0\) eV. This value is more accurate than the present accepted one by a factor of 200. The present uncertainty in the transition multipolarity was removed and it was found to be \( M1+E2\) with the admixture \( \vert\delta (E2/M1)\vert = 0.035 \pm 0.006\).

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Authors and Affiliations

  1. Dzhelepov Laboratory of Nuclear Problems, JINR, 141980, Dubna, Moscow Region, Russia

    A. Kovalík, A. Kh. Inoyatov, L. L. Perevoshchikov, D. V. Filosofov & J. A. Dadakhanov

  2. Nuclear Physics Institute of the ASCR, CZ-25068, Řež near Prague, Czech Republic

    A. Kovalík & M. Ryšavý

  3. Institute of Applied Physics, National University, University Str. 4, 100174, Tashkent, Uzbekistan

    A. Kh. Inoyatov

Authors
  1. A. Kovalík
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  2. A. Kh. Inoyatov
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  3. L. L. Perevoshchikov
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  4. M. Ryšavý
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  5. D. V. Filosofov
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  6. J. A. Dadakhanov
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Corresponding author

Correspondence to A. Kh. Inoyatov.

Additional information

Communicated by M.J. Garcia Borge

Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: All data generated during this study]

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Kovalík, A., Inoyatov, A.K., Perevoshchikov, L.L. et al. An experimental investigation of the 15.1 keV M1 + E2 nuclear transition in 227Th from the \(\beta^{-}\) decay of 227Ac. Eur. Phys. J. A 55, 131 (2019). https://doi.org/10.1140/epja/i2019-12812-5

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  • DOI: https://doi.org/10.1140/epja/i2019-12812-5

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