Measurements and model calculations of activation cross sections for Th-232(n,2n)231Th reaction between 13.57 and 14.83 MeV neutrons


Reyhancan I. A.

ANNALS OF NUCLEAR ENERGY, cilt.38, ss.2359-2362, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 38 Konu: 11
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.anucene.2011.07.032
  • Dergi Adı: ANNALS OF NUCLEAR ENERGY
  • Sayfa Sayıları: ss.2359-2362

Özet

In this study, activation cross sections were measured for the reaction of Th-232(n2n)231Th (T-1/2 = 25.5 h) by using neutron activation technique at six different neutron energies from 13.57 and 14.83 MeV. Neutrons were produced via the H-3(H-2,n)4He reaction using SAMES T-400 neutron generator. Irradiated and activated high purity Thorium foils were measured by a high-resolution gamma-ray spectrometer with a highpurity Germanium (HpGe) detector. In cross section measurements, the corrections were made for the effects of gamma-ray self-absorption in the foils, dead-time, coincidence summing, fluctuation of neutron flux, low energy neutrons. For this reaction, statistical model calculation, which the pre-equilibrium emission effects were taken into consideration, were also performed between 13.57 and 14.83 MeV energy range. The cross sections were compared with previous works in literature, with model calculation results, and with evaluation data bases (ENDF/B-VII, ENDF/B-VI, JEFF-3.1, JENDL-4.0, JENDL-3.3, and ROSFOND-2010). (C) 2011 Elsevier Ltd. All rights reserved.