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目的研究中子辐照杀灭炭疽菌的可行性以及制定一套高效率的采用中子照射杀灭炭疽菌的方案。方法利用MCNP程序建立模型,通过模拟得到单个中子在炭疽孢子中的能量沉积,以此估算出在该种情况下使全部炭疽孢子达到致死剂量的时间。通过研究反射层厚度、材料种类、炭疽层的面积以及中子源种类等因素对单个中子能量沉积的影响,制定出一套高效率的杀灭炭疽菌的方案。结果以14.0MeV中子管为中子源,炭疽层样本的面积为10cm×10cm,中子源距离炭疽层上表面5cm时的值为5×10-4MeV/g,只需要约20min就可以将炭疽孢子全部杀灭,而如果使用1014n/s产额的中子管只需十多秒即可使炭疽孢子达到致死剂量。结论中子辐照杀灭炭疽菌具有很高的效率和研究价值。
Objective To study the feasibility of using neutron irradiation to kill anthrax and to develop a high efficiency scheme of using neutron irradiation to kill anthrax. Methods The MCNP program was used to establish a model to simulate the energy deposition of a single neutron in anthrax spores, in order to estimate the time to let all the anthrax spores reach the lethal dose in this case. By studying the influence of the thickness of reflecting layer, the type of material, the area of anthrax layer and the type of neutron source on the energy deposition of a single neutron, a set of high efficiency program to kill anthrax was developed. Results 14.0MeV neutron tube as a neutron source, anthrax sample area of 10cm × 10cm, neutron source from the upper surface of anthrax layer when the value of 5 × 10-4MeV / g, only takes about 20min Anthrax spores all kill, and if the use of 1014n / s yield of neutron tube just takes more than ten seconds to make anthrax spores lethal dose. Conclusion Neutron irradiation to kill anthrax has high efficiency and research value.