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Experimental cross sections in fission of natural uranium induced by a neutron spectrum of 12.4-MeV average energy

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Abstract

Yields of fission products are essential for designing Radioactive Ion Beam facilities and extracting cross section data to refine reaction models. This work reports the results of irradiations of natural uranium targets with a continuous spectrum of fast neutrons. A rapid transport system has been used to bring the targets in front of two segmented Clover detectors operated in coincidence. Decay \(\gamma \)-ray spectroscopy of the fission products has allowed for cross sections to be obtained in 61 mass chains, either as independent or as cumulative for the chain. Interpolation versus mass number together with the assumption of a Gaussian distribution of isobars enable cross sections to be evaluated in nearly 80 mass chains. The measurement demonstrates the power of the detectors for twofold \(\gamma \)–\(\gamma \) events following \(\beta \)-decay and indicates that new fission product decay data could be obtained with a dedicated set up.

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Data Availability Statement

This manuscript has associated data in a data repository. [Authors’ comment: The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.]

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Acknowledgements

The authors are indebted to O. Bajeat, S. Gaudu, P. Karvonen, S. Ketelhut and M.G. Saint-Laurent for their contribution during the experiment, as well as to the GANIL and JYFL laboratories for having granted access to their computing facilities after retirement of one of us (G.L). This work has been supported in part by the Academy of Finland under the Finnish Centre of Excellence Programme 2006–2011. Support by the National Research Foundation of South Africa grant numbers 90741 and 127116 is acknowledged.

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Authors and Affiliations

  1. Guilherand-Granges, France

    G. Lhersonneau

  2. iThemba Laboratories for Accelerator Based Sciences, PO Box 722, Somerset West, South Africa

    P. Jones

  3. CEA/DRF/IRFU-CNRS/IN2P3, GANIL, Bd. H. Becquerel, BP 55027, 14076, Caen, Cedex 5, France

    M. Fadil

  4. CSC-IT Center for Science Ltd, P.O.Box 405, Keilaranta 14, 02101, Espoo, Finland

    T. Malkiewicz

  5. Department of Physics, University of Jyväskylä, P.O.Box 35, 40014, Jyväskylä, Finland

    W. H. Trzaska

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  1. G. Lhersonneau
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  2. P. Jones
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  3. M. Fadil
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  4. T. Malkiewicz
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Correspondence to P. Jones.

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Lhersonneau, G., Jones, P., Fadil, M. et al. Experimental cross sections in fission of natural uranium induced by a neutron spectrum of 12.4-MeV average energy. Eur. Phys. J. Plus 138, 303 (2023). https://doi.org/10.1140/epjp/s13360-023-03912-7

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