TY - JOUR
T1 - Attenuation of neutrons in the atmosphere and a thick carbon target
AU - Koi, T.
AU - Muraki, Y.
AU - Masuda, K.
AU - Matsubara, Y.
AU - Sako, T.
AU - Murata, T.
AU - Tsuchiya, H.
AU - Shibata, S.
AU - Munakata, Y.
AU - Hatanaka, K.
AU - Wakasa, T.
AU - Sakai, H.
N1 - Funding Information:
We thank Prof. H. Ejiri and Prof. Y. Nagai who are the former and the present directors of RCNP for providing us their machine time for present experiment. The author thanks Prof. Sir Ian Axford for reading the manuscript. We also acknowledge the help of Mr. I. Imaida, A. Okada, T. Hoshida, and S. Ohno in the preparation of the experiment. This project was carried out as a part of Grant-in-Aid for Scientific Research on Priority Areas (A) of Japanese Ministry of Education, Science, Sports and Culture.
PY - 2001/8/1
Y1 - 2001/8/1
N2 - 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.
AB - 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.
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U2 - 10.1016/S0168-9002(01)00289-3
DO - 10.1016/S0168-9002(01)00289-3
M3 - Article
AN - SCOPUS:0035421814
SN - 0168-9002
VL - 469
SP - 63
EP - 69
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1
ER -