1. Assume 235U splits into two stable nuclides 100 Ru, 132Xe and three neutrons. About 86%of the energy is in the kinetic energy of the fission fragments. a fully enriched 3U bomb is expected to give a prompt explosive yield of about 20 kilotons of TNT. How many kilograms of 235U are required (assume actually explosive yield efficiency is around 30%)? 2. Describe two methods used for separating 5U from natural uranium 3. What is the meaning of critical mass or critical size? How to roughly estimate the critical size of 233u bomb?
1．Assume 235U splits into two stable nuclides 100Ru, 132Xe and three neutrons. About 86% of the energy is in the kinetic energy of the fission fragments. A fully enriched 235U bomb is expected to give a prompt explosive yield of about 20 kilotons of TNT. How many kilograms of 235U are required (assume actually explosive yield efficiency is around 30%)? 2．Describe two methods used for separating 235U from natural uranium. 3．What is the meaning of critical mass or critical size? How to roughly estimate the critical size of 233U bomb?
