4.5 Article

Measurement of the 169Tm(n, 3n)167Tm cross section and the associated branching ratios in the decay of 167Tm

Journal

PHYSICAL REVIEW C
Volume 93, Issue 1, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.93.014611

Keywords

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Funding

  1. US Department of Energy by Lawrence Berkeley National Laboratory [DE-AC02-05CH11231]
  2. Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
  3. Laboratory Directed Research and Development Program [15-ERD-015]
  4. University of California [DE-AC0376SF0098]
  5. US Department of Energy's NNSA, Office of Nonproliferation Research and Development [NA-22]
  6. Department of Energy National Nuclear Security Administration through the Nuclear Science and Security Consortium [DE-NA-0000979]
  7. US Department of Energy [DE-FG-97ER40133]
  8. National Nuclear Security Administration [DA-NA-0001839]

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The cross section for the Tm-169(n, 3n) Tm-167 reaction was measured from 17 to 22 MeV using quasimonoenergetic neutrons produced by the H-2(d, n) He-3 reaction. This energy range was studied to resolve the discrepancy between previous (n, 3n) cross-section measurements. In addition, the absolute gamma-ray branching ratios following the electron-capture decay of Tm-167 were measured. These results provide more reliable nuclear data for an important diagnostic that is used at the National Ignition Facility to estimate the yield of reaction-in-flight neutrons produced via the inertial-confinement-fusion plasma in deuterium-tritium capsules.

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