Physics

Problem

Which one of the following single-step nuclear processes is expected to absorb energy rather than release it? a)

^{2}\!\text{H}+{}^{3}\!\text{H}\;\rightarrow\;{}^{4}\!\text{He}+n

^{12}\!\text{C}+{}^{12}\!\text{C}\;\rightarrow\;{}^{24}\!\text{Mg}

^{56}\!\text{Fe}+{}^{56}\!\text{Fe}\;\rightarrow\;{}^{112}\!\text{Xe}

n+{}^{235}\!\text{U}\;\rightarrow

fission fragments

+\,

neutrons