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Measurement of the neutron-induced fission cross section of \(^{243}\)Am relative to \(^{235}\)U in the neutron energy range of 0.3–500 MeV and its analysis

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Abstract

The \(^{243}\)Am fission cross section was measured for incident neutron energies from 0.3 MeV to 500 MeV on the time-of-flight spectrometer of the neutron complex GNEIS at the NRC “Kurchatov Institute” – PNPI. Fission fragments were registered using position-sensitive low-pressure multiwire counters, which made it possible to simultaneously measure the angular distributions of fission fragments. As a result of processing these distributions, the energy dependence of the angular anisotropy of fission fragments of \(^{243}\)Am in a wide range of neutron energies was determined for the first time. The cross section of \(^{243}\)Am(n, f) was measured relative to the \(^{235}\)U(n, f) cross section. The obtained data are compared with the results of other experimental works. Theoretical estimates for the fission cross section and anisotropy of angular distribution of fission fragments for the \(^{243}\)Am(n, f) reaction are presented and discussed.

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Data Availability

Data will be made available on reasonable request. [Author’s comment: Data sharing not applicable to this article as no datasets were generated or analysed during the current study.]

Code availability statement

This manuscript has no associated code/software data. [Author’s comment: Code/Software sharing not applicable to this article as no code/software was generated or analysed during the current study.]

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Acknowledgements

The authors express their sincere gratitude to E.M. Ivanov and the staff of the Accelerator Department of NRC “Kurchatov Institute” – PNPI for the constant friendly support and stable operation of the synchrocyclotron SC-1000 during the experiment as well as L.S. Falev for help in creating the experimental setup.

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Authors and Affiliations

  1. B.P. Konstantinov Petersburg Nuclear Physics Institute of National Research Center “Kurchatov institute”, Gatchina, 188300, Leningrad Region, Russia

    Alexander S. Vorobyev, Alexei M. Gagarski, Oleg A. Shcherbakov & Larisa A. Vaishnene

  2. National Research Center “Kurchatov institute”, Moscow, 123182, Russia

    Alexey L. Barabanov

  3. National Research Nuclear University MEPhI, Moscow, 115409, Russia

    Alexey L. Barabanov

  4. JSC “V.G. Khlopin Radium Institute”, Rosatom State Atomic Energy Corporation, St. Petersburg, 194021, Russia

    Tatiana E. Kuz’mina

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  1. Alexander S. Vorobyev
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  2. Alexei M. Gagarski
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  3. Oleg A. Shcherbakov
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  4. Larisa A. Vaishnene
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  5. Alexey L. Barabanov
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Correspondence to Alexander S. Vorobyev.

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Communicated by Alberto Mengoni.

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Vorobyev, A.S., Gagarski, A.M., Shcherbakov, O.A. et al. Measurement of the neutron-induced fission cross section of \(^{243}\)Am relative to \(^{235}\)U in the neutron energy range of 0.3–500 MeV and its analysis. Eur. Phys. J. A 60, 117 (2024). https://doi.org/10.1140/epja/s10050-024-01334-2

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