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Search for the “stability island” of superheavy nuclei using natural track detectors

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Abstract

The method of using natural track detectors, i.e., meteorite olivine crystals, is developed and improved applied to the problem of searching for superheavy nuclei in nature, in galactic cosmic rays (GCR). The new technique implements the sequence of etching, grinding, and track identification operations using the automated PAVICOM facility. The data on the track length and etching rate in combination with the results of calibration on heavy nucleus accelerators allowed the development of a technique for determining the GCR nucleus charge with an accuracy of ±2. On this basis, a significant set of experimental data on superheavy nuclei of natural origin was obtained (21743GCRheavy nucleiwithZ >20, including three nucleiwith a charge of 119−6+10). The minimum lifetime Tmin of the last-mentioned is within 50 years< Tmin < 100 years, which exceeds the lifetime of transfermium nuclei synthesized on accelerators by many orders of magnitude. The long-lived superheavy nuclei detected in the GCR spectrum can belong to the “stability island”.

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Authors and Affiliations

  1. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991, Russia

    V. A. Alekseev, G. V. Kalinina & T. A. Pavlova

  2. Lebedev Physical Institute, Russian Academy of Sciences, Leninskii pr. 53, Moscow, 119991, Russia

    A. V. Bagulya, A. E. Volkov, A. A. Gippius, L. A. Goncharova, S. A. Gorbunov, N. S. Konovalova, N. M. Okat’eva, N. G. Polukhina, N. I. Starkov, Tang Naing Soe, M. M. Chernyavsky & T. V. Shchedrina

  3. National University of Science and Technology “MISIS”, Leninskii pr. 4, Moscow, 119049, Russia

    N. G. Polukhina

Authors
  1. V. A. Alekseev
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  2. A. V. Bagulya
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  3. A. E. Volkov
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  4. A. A. Gippius
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  5. L. A. Goncharova
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  6. S. A. Gorbunov
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  7. G. V. Kalinina
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  8. N. S. Konovalova
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  9. N. M. Okat’eva
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  10. T. A. Pavlova
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  11. N. G. Polukhina
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  12. N. I. Starkov
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  13. Tang Naing Soe
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  14. M. M. Chernyavsky
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  15. T. V. Shchedrina
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Corresponding author

Correspondence to N. G. Polukhina.

Additional information

Original Russian Text © V.A. Alekseev, A.V. Bagulya, A.E. Volkov, A.A. Gippius, L.A. Goncharova, S.A. Gorbunov, G.V. Kalinina, N.S. Konovalova, N.M. Okat’eva, T.A. Pavlova, N.G. Polukhina, N.I. Starkov, TangNaing Soe, M.M. Chernyavsky, T.V. Shchedrina, 2017, published in Kratkie Soobshcheniya po Fizike, 2017, Vol. 44, No. 11, pp. 41–47.

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Alekseev, V.A., Bagulya, A.V., Volkov, A.E. et al. Search for the “stability island” of superheavy nuclei using natural track detectors. Bull. Lebedev Phys. Inst. 44, 336–339 (2017). https://doi.org/10.3103/S1068335617110069

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  • DOI: https://doi.org/10.3103/S1068335617110069

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