@article{oai:repo.qst.go.jp:00042948,
 author = {Koi, Tatsumi and Muraki, Yasushi and Masuda, Kimiaki and Matsubara, Yutaka and Sako, Takashi and Murata, Takuya and Tsuchiya, Harufumi and Shibata, Shoichi and Munakata, Yoshinori and Hatanaka, Kichiji and Wakasa, Tomotsugu and Sakai, Hideyuki and 小井 辰巳},
 journal = {Nuclear Instruments & Methods in Physics Research Section A},
 month = {},
 note = {A neutron beam dump experiment has been carried out using the accelerator beam at RCNP, Osaka University. Neutrons with energies Tn=100?00 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.},
 pages = {63--69},
 title = {Attenuation of neutrons in the atmosphere and a thick carbon target},
 volume = {469},
 year = {2001}
}