Attenuation of neutrons in the atmosphere and a thick carbon target

T. Koi, Y. Muraki, K. Masuda, Y. Matsubara, T. Sako, T. Murata, H. Tsuchiya, S. Shibata, Y. Munakata, K. Hatanaka, T. Wakasa, H. Sakai

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


A neutron beam dump experiment has been carried out using the accelerator beam at RCNP, Osaka University. Neutrons with energies Tn = 100-400 MeV were allowed to bombard a carbon target (density 1.8 g/cm3) which had a thickness varying from 0 to 300 cm, and the attenuation of the neutrons was measured in the range from 0 to 540 g/cm2. The experimental data were well reproduced by the Monte Carlo calculation by the Shibata model. Using these results, the attenuation of neutrons in the Earth's atmosphere was obtained by means of a simulation. The results are useful not only for cosmic ray experiments but also for radiation protection experiments since the target does not contain hydrogen.

Original languageEnglish
Pages (from-to)63-69
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1
Publication statusPublished - Aug 1 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation


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