Assertion: hydrogen atom's neutron | /r/CapableOf | irradiate the u-238 bomb casing
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text: The fuel undergoing the fusion reaction emits a large flux of high energy (17.6 MeV) neutrons, which irradiates the U-238 tamper (or the U-238 bomb casing), causing it to undergo a fast fission reaction, providing about half of the total energy.