The solution of the problem 4.45 кр 4 from the problem

The solution of the problem 4.45 кр 4 from the problem

Task 4.45
Calculate the mass defect, binding energy and specific binding energy of the nucleus 23892U.
Task 4.55
Determine the threshold energy for the formation of an electron-positron pair in the Coulomb field
Electron, which occurs according to the scheme
+ E -> e - + e + + e-.