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Retrospective neutron spectrum determination of a (30 MeV D, Be) source using the multi-foil activation technique and STAYSL-PNNL

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Abstract

Retrospective characterization of a (30 MeV D, Be) neutron source was performed employing multi-foil activation and STAYSL-PNNL. Experimental reaction rates were calculated from gamma spectroscopy measurements of irradiated foils and MCNP provided the guess spectrum. Adjusted spectra were evaluated through activation calculations for a stainless-steel target using FISPACT-II. Adjusted spectra showed limited dependence on the dosimetry reactions and provided minor improvements in activation calculations. Omitting reflected neutrons in the guess spectrum generated poor activation results and the limited number of dosimetry reactions introduced doubt in the adjusted spectra. A dedicated neutron spectrometry experiment and a more detailed simulation is required.

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Acknowledgements

This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.

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Authors and Affiliations

  1. Department of Chemistry and Biochemistry, University of Maryland, 0107 Chemistry Building, College Park, MD, 20742, USA

    John J. Goodell & Alice C. Mignerey

  2. Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, 7000 East Ave, P.O. Box 808, Livermore, CA, 94551, USA

    Christine M. Egnatuk, Stephen W. Padgett, Bryan B. Bandong & Kevin E. Roberts

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  1. John J. Goodell
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  2. Christine M. Egnatuk
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Correspondence to John J. Goodell.

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Goodell, J.J., Egnatuk, C.M., Padgett, S.W. et al. Retrospective neutron spectrum determination of a (30 MeV D, Be) source using the multi-foil activation technique and STAYSL-PNNL. J Radioanal Nucl Chem 318, 375–380 (2018). https://doi.org/10.1007/s10967-018-6064-1

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