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Production of Transuranium Nuclides in Pulsed Neutron Fluxes from Thermonuclear Explosions

  • Fields, Particles, and Nuclei
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Abstract

The production of transuranium nuclides in pulsed neutron fluxes from thermonuclear explosions has been studied within the kinetic model of the astrophysical r-process taking into account the time dependence of external parameters and processes accompanying the beta decay of neutron-rich nuclei. Neutron fluxes depending on the time in the range of ~10–6 s have been simulated within the developed adiabatic binary model. The probabilities of beta-delayed processes have been calculated within the microscopic theory of finite Fermi systems. The yields of transuranium nuclides Y(A) have been calculated for three experimental thermonuclear explosions Mike (YM), Par (YP), and Barbel (YB) (United States). The rms deviations of the calculations from experimental data are 91, 33, and 29% for YM, YP, and YB, respectively. These deviations are much smaller than those for other known calculations and are comparable with the proposed exponential approximation ensuring rms deviations of 56, 86.8, and 60.2% for YM, YP, and YB, respectively. The even–odd anomaly in the observed yields of heavy nuclei is explained by the dominant effect of processes accompanying the beta decay of heavy neutron-rich isotopes.

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Authors and Affiliations

  1. National Research Center Kurchatov Institute, Moscow, 123182, Russia

    Yu. S. Lutostansky & V. I. Lyashuk

  2. Institute for Nuclear Research, Russian Academy of Sciences, Moscow, 117312, Russia

    V. I. Lyashuk

Authors
  1. Yu. S. Lutostansky
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  2. V. I. Lyashuk
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Correspondence to Yu. S. Lutostansky.

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Original Russian Text © Yu.S. Lutostansky, V.I. Lyashuk, 2018, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2018, Vol. 107, No. 2, pp. 87–93.

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Lutostansky, Y.S., Lyashuk, V.I. Production of Transuranium Nuclides in Pulsed Neutron Fluxes from Thermonuclear Explosions. Jetp Lett. 107, 79–85 (2018). https://doi.org/10.1134/S0021364018020108

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  • DOI: https://doi.org/10.1134/S0021364018020108

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