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Search for superheavy elements in galactic cosmic rays

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Abstract

The charge distribution of approximately 6000 nuclei with charge numbers above 55 in galactic cosmic rays has been obtained in the OLIMPIYA project. Three superheavy nuclei with the charge numbers in the range 105 < Z < 130 have been detected. The regression analysis has provided a more accurate estimate of the charge number of one of these nuclei (119 +10−6 with a probability of 95%). Such nuclei should form stability islands. Their detection in nature confirms theoretical predictions and justifies efforts for their synthesis under terrestrial conditions. The model calculations performed in this work possibly can explain the results of some experiments on the investigation of the charge composition of cosmic rays in which particles with charge numbers in the range 94 < Z < 100 were detected (they cannot enter into the composition of primary cosmic radiation because their lifetime is very short). The calculations indicate that events with Z > 92 are due to the fragmentation of heavier nuclei from the stability island, rather than to methodical inaccuracies or fault of instruments. Several such events have been revealed. Thus, the track method makes it possible to obtain the results very important for understanding of the physical picture of the world. The results obtained within the OLIMPIYA project show that the study of tracks of galactic cosmic rays in olivine crystals from meteorites opens new capabilities for the investigation of fluxes and spectra in cosmic rays in the region of heavy and superheavy nuclei.

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Authors and Affiliations

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

    A. V. Bagulya, N. S. Konovalova, N. M. Okat’eva, N. G. Polukhina & N. I. Starkov

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

    L. L. Kashkarov

Authors
  1. A. V. Bagulya
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  2. L. L. Kashkarov
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  3. N. S. Konovalova
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  4. N. M. Okat’eva
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  5. N. G. Polukhina
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  6. N. I. Starkov
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Correspondence to N. G. Polukhina.

Additional information

Original Russian Text © A.V. Bagulya, L.L. Kashkarov, N.S. Konovalova, N.M. Okat’eva, N.G. Polukhina, N.I. Starkov, 2013, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2013, Vol. 97, No. 12, pp. 811–824.

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Bagulya, A.V., Kashkarov, L.L., Konovalova, N.S. et al. Search for superheavy elements in galactic cosmic rays. Jetp Lett. 97, 708–719 (2013). https://doi.org/10.1134/S0021364013120047

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  • DOI: https://doi.org/10.1134/S0021364013120047

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