In analyzing the neutron active detection , the neutron multiplication in the nuclear warheads induced by outer neutron source with different neutron energys is studied with numeral simulation , and the feasibility of through counting neutrons to determine the presence of high enrichment uranium ( heu ) in nuclear warhead has been proved . the method of detecting the warhead which contains heu pit by counting the released neut rons whose energy is higher than that of source neutron is studied . the feasibility of this method has been studied 对几种主动探测核弹头方法进行的研究中，首先对不同能量各向同性外源中子照射核弹头的中子增殖行为进行了数值模拟，检验了用外源中子照射核弹头后，通过测量瞬发中子在核弹头中的增殖量，来证明核弹头中高浓铀存在的可行性；研究了用能量低于1mev的外中子源照射核弹头，用测量核弹头中裂变产生的高于源中子能量中子数的方法探测核弹头，通过数值模拟分析了可行性。
Because the nuclear disarmament verification technologies are quite complex , particularly the technology for nuclear warhead detection is very difficult , and it concerns to the sensitive issues such as national security and nonproliferation of nuclear weapons , it would be benefitial for china to explore the technology of nuclear warhead detection before participating in the nuclear disarmament process 由于核裁军的核查技术复杂，特别是核弹头的探测技术复杂，难度大，涉及国家的安全和国际核不扩散等敏感问题，因此在中国参加核裁军之前开展核查技术中的核弹头探测技术研究是一项非常重要的技术储备。
