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

作者：Cassata W S^*; Velsko C A; Stoeffl W; Jedlovec D R; Golod A B; Shaughnessy D A; Yeamans C B; Edwards E R; Schneider D H G

来源：Journal of Radioanalytical and Nuclear Chemistry, 2016, 309(2): 899-908.

DOI：10.1007/s10967-015-4662-8

• Fission yields
• National Ignition Facility
• Xenon isotopes
• Depleted uranium
• 14 MeV neutrons

We determined fission yields of xenon (Xe-133m, Xe-135, Xe-135m, Xe-137, Xe-138, and Xe-139) 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 Xe-133m, Xe-135, and Xe-135m 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 Xe-139. Considerable differences exist between our measured yields and the JEFF-3.1 database values.

• 出版日期2016-8