Takahashi Yoshiyuki, Misawa Tsuyoshi, Pyeon Cheol Ho, Shiroya Seiji, Yoshikawa Kiyoshi
Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto, Japan.
Appl Radiat Isot. 2011 Jul;69(7):1027-32. doi: 10.1016/j.apradiso.2011.01.008. Epub 2011 Jan 11.
The usefulness of the measurements of the backscattering neutron and 2.22MeV capture γ-ray from hydrogen in the landmine detection method is described in this paper. When the soil moisture content is increased, the reaction rates of both the neutron scattering reaction and capture reaction are increased. However, the backscattering neutrons are more influenced than the capture γ-rays by the soil moisture before the reaction with the detector. The facts that the backscattering neutron method is useful in the dry soil case and that the capture γ-ray method is effective in well-wet soil case are confirmed by the experiments and the calculations. The landmine detection efficiency is improved in various soil moisture conditions by combining the backscattering neutron method together with the capture γ-ray method. The effectiveness of the pulse mode operation was confirmed numerically.
本文描述了在探雷方法中测量来自氢的背散射中子和2.22兆电子伏俘获γ射线的有用性。当土壤含水量增加时，中子散射反应和俘获反应的反应速率都会增加。然而，在与探测器发生反应之前，背散射中子比俘获γ射线受土壤湿度的影响更大。实验和计算证实了背散射中子法在干燥土壤情况下有用，而俘获γ射线法在土壤充分湿润的情况下有效。通过将背散射中子法与俘获γ射线法相结合，在各种土壤湿度条件下提高了探雷效率。通过数值计算证实了脉冲模式操作的有效性。
