Characterization of a 40-90 MeV 7Li(p,n) neutron source at TIARA using a proton recoil telescope and a TOF method

M. Baba, Y. Nauchi, T. Iwasaki, T. Kiyosumi, M. Yoshioka, S. Matsuyama, N. Hirakawa, T. Nakamura, Su Tanaka, S. Meigo, H. Nakashima, Sh Tanaka, N. Nakao

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99 Citations (Scopus)


The intensity and energy spectra of a quasi-monoenergetic 7Li(p,n) neutron source at TIARA of Japan Atomic Energy Research Institute (JAERI) have been measured for eight incident proton energies between 43 and 87 MeV, using a proton recoil telescope (PRT) of annular geometry and a time-of-flight (TOF) method employing organic scintillators (BC501A, NE213) calibrated prior to the experiment. By combining the two data, we deduced energy spectra of the source neutrons absolutely down to a few MeV, and the cross section of the peak neutron production reaction, 7Li(p,n0.1)7Be. The continuum component of the energy spectrum in the source proved to be described consistently by assuming a three-body phase-space distribution corresponding to the 7Li(p,n3He)α reaction as a main component. The annular PRT achieved a good compromise between energy resolution and detection efficiency with a good signal-to-noise ratio.

Original languageEnglish
Pages (from-to)454-465
Number of pages12
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number2
Publication statusPublished - 1999 Jun

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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