Spallation Neutron Measurement by the Time-of-Flight Method with a Short Flight Path

Tatsushi Nakamoto, Kenji Ishibashi, Naruhiro Matsufuji, Nobuhiro Shigyo, Keisuke Maehata, Shin ichirou Meigo, Hiroshi Takada, Satoshi Chiba, Masaharu Numajiri, Takashi Nakamura, Yukinobu Watanabe

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


The experimental method of measuring neutron production double-differential cross sectionswas tested at incident proton energies of 0.8 and 1.5GeV with C and Pb targets. Neutronswere measured with liquid scintillators by the time-of-flight method. The use of very weaksecondary beam forced us to take a typical flight path length as short as 1m. Preliminaryexperimental consideration led to the results that the amount of back ground neutrons weremade low by the short flight path measurement, and a two-gate integration method was suitedfor the pulse shape discrimination between high energy neutrons and gamma-rays. The crosssections were obtained in the neutron energy range up to 100MeV with acceptable energyresolution. The experimental results obtained at the incident proton energy of 0.8GeV wereconsistent with the data taken with much longer flight paths. It was confirmed that the time-of-flight method with bare detectors at the short flight path was reliably applicable to thespallation neutron measurement.

Original languageEnglish
Pages (from-to)827-833
Number of pages7
Journaljournal of nuclear science and technology
Issue number9
Publication statusPublished - 1995

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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