Abstract
A preliminary test of a liquid mercury target for the production of neutrons by spallation was undertaken at the Alternating Gradient Synchrotron facility at Brookhaven National Laboratory. Neutron activation of elemental foils placed on the target demonstrates that a range of neutron energies does exist, as expected, and that the neutron flux is at a maximum 10–20 cm from the front of the target, moving deeper with increasing proton energy. Uncertainties in the activity calculations are in general significantly <10%. Impurities in some of the foils are a significant source of interference for some reactions, although there is no interference for most of the reactions. The presence of many interference-free reactions, along with the low uncertainties indicates that the foils will be useful benchmarks to validate the neutronics codes utilized in the target design.
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References
R. Filges, D. Neff, H. Schaal, Nuclear studies of different target systems for ESS, Proc. 3th Meeting of the International Collaboration on Advanced Neutron Sources, Paul Scherrer Institute, Switzerland, October, 1995.
T. A. Gabriel et al., Spallation neutron source target station issues, Symp. on the Savannah River Accelerator Project and Complementary Neutron Sources, Columbia, South Carolina, 1996.
J. R. Haines et al., Comparison of liquid and solid targets for pulsed spallation neutron sources, NSNS/Target Station Note 0009, Oak Ridge National Laboratory, 1997.
NSNS Collaboration Conceptual Design Report, NSNS/CDR-2/V2, 1997.
J. F. Briesmeister (Ed.), MCNP—A General Purpose Monte Carlo Code for Neutron and Photon Transport, LASL Report LA-7396-M, Revision 2, 1986.
T. A. Gabriel et al., CALOR87:HETC87, MICAP, EGS4, and SPECT, a code system for analyzing detectors for use in high energy physics experiments, Proc. of the Workshop on Detector Simulation for the SSC, Argonne National Laboratory, August, 1987.
E. Browne, R. B. Firestone, Table of Radioactive Isotopes, Wiley, New York, 1986.
J. R. Parrington, H. D. Knox, S. L. Breneman, E. M. Baum, F. Feiner, Nuclides and Isotopes, Chart of the Nuclides, 15th ed., General Electric-Lockheed Martin, 1996.
G. Erdtmann, Neutron Activation Tables, Verlag Chemie, Weinheim, 1976.
L. A. Charlton, E. A. Jerde, D. C. Glasgow, T. A. Gabriel, Radiat. Meas., (submitted).
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Jerde, E.A., Glasgow, D.C. & Hastings, J.B. Neutron activation by neutrons produced via proton-induced spallation in a liquid-mercury target: Measurements and assessment of uncertainties. J Radioanal Nucl Chem 242, 473–485 (1999). https://doi.org/10.1007/BF02345580
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DOI: https://doi.org/10.1007/BF02345580