Nuclear Physics and Atomic Energy

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Nuclear Physics and Atomic Energy

  ISSN: 1818-331X (Print), 2074-0565 (Online)
  Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine
  Languages: Ukrainian, English, Russian
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Nucl. Phys. At. Energy 2015, volume 16, issue 1, pages 5-14.
Section: Nuclear Physics.
Received: 22.01.2015; Accepted: 19.03.2015; Published online: 20.04.2015.
PDF Full Text (ru)
https://doi.org/10.15407/jnpae2015.01.005

Isomeric yield ratios and mean angular momenta of photofission fragments of 235U, 237Np and 239Pu

I.M. Vyshnevskyi1, V.O. Zheltonozhskyi1, V.A. Plujko2, A.M. Savrasov1,*, O.M. Gorbachenko2, O.I. Davydovska1, E.P. Rovenskykh2

1 Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
2 Taras Shevchenko National University, Kyiv, Ukraine

*Corresponding author. E-mail address: savrasov@kinr.kiev.ua.

Abstract: Isomeric yield ratios for the fragments of photofission of 235U, 237Np and 239Pu by bremsstrahlung with end-point energy of 18 MeV are measured. New data for isomeric yield ratios of the fragments 84Se, 90Br, 131Te, 132Sb, 132I, 133Te, 134I, 135Xe are determined. The contributions to the isomeric yield ratios from β-decay of the nuclei of parent isobaric chains were removed. Mean angular momenta of studied nuclei are estimated within the framework of an extended Huizenga-Vandenbosh statistical model with using EMPIRE 3.2 code.

Keywords: photofission, isomeric ratios method, average angular momenta of fission products.

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