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Determination of gaseous fission product yields from 14 MeV neutron induced fission of 238U at the National Ignition Facility

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Abstract

We determined fission yields of xenon (133mXe, 135Xe, 135mXe, 137Xe, 138Xe, and 139Xe) resulting from 14 MeV neutron induced fission of depleted uranium at the National Ignition Facility. Measurements begin approximately 20 s after shot time, and yields have been determined for nuclides with half-lives as short as tens of seconds. We determined the relative independent yields of 133mXe, 135Xe, and 135mXe to significantly higher precision than previously reported. The relative fission yields of all nuclides are statistically indistinguishable from values reported by England and Rider (ENDF-349. LA-UR-94-3106, 1994), with exception of the cumulative yield of 139Xe. Considerable differences exist between our measured yields and the JEFF-3.1 database values.

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Acknowledgments

This work 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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Correspondence to W. S. Cassata.

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Cassata, W.S., Velsko, C.A., Stoeffl, W. et al. Determination of gaseous fission product yields from 14 MeV neutron induced fission of 238U at the National Ignition Facility. J Radioanal Nucl Chem 309, 899–908 (2016). https://doi.org/10.1007/s10967-015-4662-8

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  • DOI: https://doi.org/10.1007/s10967-015-4662-8

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