Question
(a) What temperature gas would have atoms moving fast enough to bring two ${}^{3}\textrm{He}$ nuclei into contact? Note that, because both are moving, the average kinetic energy only needs to be half the electric potential energy of these doubly charged nuclei when just in contact with one another. (b) Does this high temperature imply practical difficulties for doing this in controlled fusion?
1. $6.4\times 10^{9}\textrm{ K}$
2. The temperature exceeds the melting point of every material. Yes, controlled fusion is therefore difficult.
Solution Video