A radioactive nucleus in state 1 with atomic number \(Z = 92\) and mass number \(A = 238\) undergoes Transition 1 to state 2 (\(Z = 90\), \(A = 234\)), and then Transition 2 to state 3 (\(Z = 91\), \(A = 234\)), as represented in the graph of mass number \(A\) versus atomic number \(Z\). Which of the following correctly identifies the decay process occurring in Transition 1 and compares the magnitude of the change in mass number \(|\Delta A|\) for Transition 1 to that for Transition 2?