Measurement of fast neutron-induced fission cross section ratio of Neptunium-237 relative to Uranium-235 between 6 and 120 keV

Tomohiko Iwasaki, Kciichiro Saito, Mamoru Baba, Toshiya Sanami, Yasushi Nauciii, Naohiro Hirakawa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

To obtain the nuclear data for 237Np which plays an important role in high burn-up reactors and transmutation systems, we measured neutron-induced fission cross section ratios of 237Np relative to 235U between 6 and 120 keV using a pulsed white neutron source produced by the 4.5 MV Dynamitron accelerator of Tohoku University. The fission cross section ratios were measured by two separate runs with the experimental errors of 7% to 25%. The results by two separate runs agreed within the experimental errors. The fission cross section of 237Np was deduced by averaging two results and by using the fission cross section of U taken from JENDL3.2. The present results agreed with the result of Hoffman et al. and was consistent with the newest experimental result by Yamanaka et al. The present result around 10keV agreed with JENDL3.2, while those near 100 keV were close to ENDF/B-VI.

Original languageEnglish
Pages (from-to)127-134
Number of pages8
Journaljournal of nuclear science and technology
Volume36
Issue number2
DOIs
Publication statusPublished - 1999 Feb

Keywords

  • ENDF/B-VI
  • Experimental data
  • Fast neutrons
  • Fission cross section ratio
  • JENDL3.2
  • Kev range 01-10
  • Kev range 10-100
  • Kev range 100-1000
  • Measurement
  • Neptunium 237
  • Uranium 235

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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