Measurement of neutron capture cross-sections and capture γ-ray spectra of 161,162,163,164Dy at 550 keV

Hyunduk Kim, Jung Keun Ahn, Guinyun Kim, Tae Ik Ro, Won Chung Chung, Masayuki Igashira, Toshiro Ohsaki, Satoshi Mizuno

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The neutron capture cross-sections and capture γ-ray spectra of 161,162,163,164Dy were measured at a neutron energy of 550 keV by using the 3-MV Pelletron accelerator of the Research Laboratory for Nuclear Reactors at the Tokyo Institute of Technology. A neutron time-of-flight method was adopted with a 1,5-ns pulsed neutron source using the 7Li(p,n) 7Be reaction, and a large anti-Compton NaI(Tl) γ-ray spectrometer was used. A pulse-height weighting technique was applied to the observed capture γ-ray pulse-height spectra to derive the capture yields. The measured capture cross-sections were 0.221 ± 0.016, 0.110 ± 0.007, 0.119 ± 0.008, and 0.037 ± 0.005 (barn) for 161Dy, 162Dy, 163Dy, and 164Dy, respectively. The present results were in good agreement with previous measurements. However, the evaluated values of ENDF/B-VI for 162,164Dy were more than three times higher than our measurements. The capture γ-ray spectra were obtained by unfolding the observed capture γ-ray pulse-height spectra.

Original languageEnglish
Pages (from-to)1474-1480
Number of pages7
JournalJournal of the Korean Physical Society
Issue number6
Publication statusPublished - 2004 Dec 1
Externally publishedYes



  • 550 keV neutrons
  • Anti-Compton NaI(Tl) spectrometer
  • Capture gamma ray spectrum
  • Dysproslum isotopes
  • Neutron capture cross-section
  • Pulse-height weighting technique
  • Time-of-Flight method

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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