Nuclear Physics and Atomic Energy


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
  Periodicity: 4 times per year

  Open access peer reviewed journal


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Nucl. Phys. At. Energy 2017, volume 18, issue 2, pages 125-135.
Section: Nuclear Physics.
Received: 25.09.2017; Accepted: 12.10.2017; Published online: 22.11.2017.
PDF Full text (ua)
https://doi.org/10.15407/jnpae2017.02.125

Research of neutron interaction with matter under high neutron flux. Part III. Research of neutrons transmission time dependence

Yu. G. Shchepkin, V. I. Slisenko, N. I. azina*, . O. styuk

Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine

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

Abstract: Measurements of the transmission of neutrons through two samples of 235U and Cd, which are simultaneously on neutron beam, with different sequence of their location for different exposure times of the samples on the beam, are performed. Previously observed difference in these transmissions is confirmed asymmetry of transmission. The purpose of the measurements is to determine the lifetime of the expected metastable states, to explain the observed asymmetry of transmission. Based on the results of asymmetry of transmission measurements, it was found that it is less than 5 s.

Keywords: neutron, cross section, lifetime, neutron flux density, asymmetry of transmission, reduced transition probability, metastable state.

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