标题： 用60%浓缩铀制造的自制核武器 显示英文标题

标题： Improvised Nuclear Weapons with 60%-Enriched Uranium

摘要： 在本工作中，我们表明仅需40公斤的60%富集铀即可制造一枚千吨当量的简易核武器。 尽管太大无法装入导弹，但这种武器可以通过集装箱运输。 此分析是受到2025年6月以色列和美国对伊朗的袭击所激发，特别是对纳坦兹、福多温和伊斯法罕的核设施的轰炸。 截至撰写本文时，伊朗大约408公斤的60%富集铀库存无法被国际原子能机构检查员接触，并被秘密储存。 2025年6月该材料的快速秘密转移为渴望拥有核武器的恐怖分子提供了机会，使其能够转移足以用于建造类似“小男孩”型简易枪式核武器的材料。 显示英文摘要

摘要： In this work we show that as little as 40 kg of 60%-enriched uranium can be used to build a crude nuclear weapon with a kiloton yield. While too large to fit on a missile, such a weapon could be delivered by shipping container. This analysis is motivated by the June 2025 Israeli and US attacks on Iran, especially the bombings of the nuclear facilities at Natanz, Fordow, and Isfahan. The Iranian stockpile of approximately 408 kg of 60%-enriched uranium is, at the time of writing, inaccessible to IAEA inspectors and stored in secret. The rapid clandestine relocation of this material in June 2025 creates an opportunity for aspiring nuclear terrorists to divert an amount that could be used in the construction of an improvised gun-type nuclear weapon in the style of Little Boy.