I thought of subcriticality, not criticality. I also thought that the spontaneous fission could feed 238U with neutrons > 1 MeV. If there's even only trace amounts of 250Cm and 252Cf, these would get closer to 238U atoms when compressed... The neutrons get closer to 238U locally during a few...
Ok thanks a lot.
Another possibility is the contamination by 238Pu and 240Pu. My question was actually related to the use of uranium in so-called "depleted" uranium weapons, which are not made with depleted uranium as :
- Asaf Durakovic found 0,7% 235U in several samples taken in Irak, as well...
Hi,
I have a question related to 238U.
I know of course that it can fission with neutrons above 1 MeV, but there is a elevated risk it would absorb the neutron and produce 239Pu instead.
Let's assume you have a ram of metallic 238U, with perhaps 0,7% 235U, and that you collide it very very...