Recent content by T.Duncan

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1)Would you give me more examples on 'fissile' and 'fissionable' elements? i want to know more ~ 2)and why we use U but not other 'fissile' elements in a chain reaction?

1) is the fissioned U235 caused the U238 to fission in a chain reaction (since i know that the % of U238 is higher than that of U235)? 2) why can U235 fission by low energy, U238 need a large energy to fission. is it relative to the critical energy for fission? 3)In a chain reaction, why...

U235 can decay after absorbing a very low energy but U238 needs a large energy to decay, so that a chain reaction used U235, right?? other questions, why U238 needs a large energy to decay but U235 only needs < 1eV. The stability of U235 is lower than U238 ?? or other reasons ~? and a whole...

i want to ask why only U235 is used for the chain reaction but not used U238