Measurements of Double-Differential Neutron Emission Cross Sections of Nb, Mo, Ta, W and Bi for 14 and 18 MeV Neutrons

Mamoru Baba, Shigeo Matsuyama, Takuya Ito, Takeshi Ohkubo, Naohiro Hirakawa

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Double-differential neutron emission cross sections have been measured for Nb, Mo, Ta, W and Bi at 14 MeV incident energy, and for Nb and Bi at 18 MeV using Tohoku University Dynamitron TOF spectrometer. The experimental results indicated problems in current evaluations both for energy spectra and angular distributions. Angle-integrated neutron emission spectra and angular distributions of secondary neutrons were analyzed, respectively, by the statistical multi-step model code EXIFON and the systematics by Kalbach-Mann and by Kalbach. The energy spectra were reproduced successfully by EXIFON except for Bi, and the angular distributions were followed by the systematics over wide range of outgoing energy and target mass if the emission spectra calculated by EXIFON were employed for generation of angular distributions.

Original languageEnglish
Pages (from-to)757-769
Number of pages13
Journaljournal of nuclear science and technology
Volume31
Issue number8
DOIs
Publication statusPublished - 1994 Jan 1

Keywords

  • 14 and 18 MeV
  • Kalbach systematics
  • Kalbach-Mann systematics
  • TOF method
  • angular distribution
  • bismuth
  • code EXIFON
  • double-differential cross sections
  • energy spectra
  • measurements
  • molybdenum
  • neutron emission
  • niobium
  • pre-equilibrium neutrons
  • statistical multi-step model
  • tantalum
  • tungsten

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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