Measurements of neutron spectra produced from a thick tungsten target bombarded with 0.5- and 1.5-GeV protons

Shin Ichiro Meigo, Hiroshi Takada, Nobuhiro Shigyo, Kiminori Iga, Yousuke Iwamoto, Hirohiko Kitsuki, Kenji Ishibashi, Keisuke Maehata, Hidehiko Arima, Tatsushi Nakamoto, Masaharu Numajiri

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Abstract

For validation of calculation codes that are employed in the design of pulse spallation neutron source and accelerator driven system, spectrum of neutrons produced from a thick target plays an important role. However, appropriate experimental data were scarce for the incident energies higher than 0.8 GeV. In this study, the spectrum from a thick tungsten target was measured The experiment was carried out at the ダ2 beam line of the 12-GeV proton synchrotron at KEK. The tungsten target was bombarded by the 0.5- and 1.5-GeV secondary protons. Spectrum of neutrons was measured by the time-of-flight technique using organic scintillators of NE213, The calculated result with NMTC/JAM and MCNP-4A is compared with the measured data. It is found that the NMTC/JAM generally gives a good agreement with experiment. The NMTC/JAM, however, gives 50 % lower neutron flux in the energy region 20-80 MeV, which is consistent with the results in previous comparison of lead target. For the neutrons between 20 and 80 MeV, the calculation using with the in-medium nucleon-nucleon cross sections reproduced the experiment fairly well.

Original languageEnglish
Pages (from-to)1252-1255
Number of pages4
Journaljournal of nuclear science and technology
Volume39
DOIs
Publication statusPublished - Aug 2002

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neutron spectra
Tungsten
Neutrons
Protons
tungsten
protons
neutrons
Neutron flux
Neutron sources
Experiments
Synchrotrons
Phosphors
Particle accelerators
spallation
neutron sources
Lead
flux (rate)
scintillation counters
synchrotrons
accelerators

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

Cite this

Measurements of neutron spectra produced from a thick tungsten target bombarded with 0.5- and 1.5-GeV protons. / Meigo, Shin Ichiro; Takada, Hiroshi; Shigyo, Nobuhiro; Iga, Kiminori; Iwamoto, Yousuke; Kitsuki, Hirohiko; Ishibashi, Kenji; Maehata, Keisuke; Arima, Hidehiko; Nakamoto, Tatsushi; Numajiri, Masaharu.

In: journal of nuclear science and technology, Vol. 39, 08.2002, p. 1252-1255.

Research output: Contribution to journalArticle

Meigo, Shin Ichiro ; Takada, Hiroshi ; Shigyo, Nobuhiro ; Iga, Kiminori ; Iwamoto, Yousuke ; Kitsuki, Hirohiko ; Ishibashi, Kenji ; Maehata, Keisuke ; Arima, Hidehiko ; Nakamoto, Tatsushi ; Numajiri, Masaharu. / Measurements of neutron spectra produced from a thick tungsten target bombarded with 0.5- and 1.5-GeV protons. In: journal of nuclear science and technology. 2002 ; Vol. 39. pp. 1252-1255.
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AU - Iga, Kiminori

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AU - Nakamoto, Tatsushi

AU - Numajiri, Masaharu

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