NEUTRON GENERATOR AT HIROSHIMA-UNIVERSITY FOR USE IN RADIOBIOLOGY STUDY

被引:23
作者
ENDO, S [1 ]
HOSHI, M [1 ]
TAUCHI, H [1 ]
TAKEOKA, S [1 ]
KITAGAWA, K [1 ]
SUGA, S [1 ]
MAEDA, N [1 ]
KOMATSU, K [1 ]
SAWADA, S [1 ]
IWAMOTO, E [1 ]
SAKAMOTO, S [1 ]
TAKEYAMA, K [1 ]
OMURA, M [1 ]
机构
[1] NISSHIN HIGH VOLTAGE CO LTD,MAEBASHI,GUMMA 371,JAPAN
关键词
D O I
10.1269/jrr.36.91
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
A neutron generator (HIRRAC) for use in radiobiology study has been constructed at the Research Institute for Radiation Biology and Medicine, Hiroshima University (RIRBM). Monoenergetic neutrons of which energy is less than 1.3 MeV are generated by the Li-7(p,n)(7) Be reaction at proton energies up to 3 MeV. The protons are accelerated by a Schenkel-type-accelerator and are bombared onto the Li-7-target. An apparatus for the irradiation of biological material such as mice, cultured cells and so on, was designed and will be manufactured. Neutron and gamma-ray dose rates were measured by paired (TE-TE and C-CO2) ionization chambers. Contamination of the gamma ray was less than about 6% when using 10-mu m-thick Li-7 as a target. Maximum dose rates for the tissue equivalent materials was 40 cGy/min at a distance of 10 cm from the target. Energy distributions of the obtained neutrons have been measured by a He-3-gas proportional counter. The monoenergetic neutrons within an energy region from 0.1 to 1.3 MeV produced by thin Li-7 or (LiF)-Li-7 targets had a small energy spread of about 50 keV (1 sigma width of gaussian). The energy spread of neutrons was about 10% or less at an incident proton energy of 2.3 MeV. We found that HIRRAC produces small energy spread neutrons and at sufficient dose rates for use in radiobiology studies.
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页码:91 / 102
页数:12
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