Physics

Problem

For the reaction

_0^1\text{n}+{}_2^4\text{He}\;\rightarrow\;{}_1^3\text{H}+{}_1^2\text{H}

the atomic masses are

_0^1\text{n}=1.008665\,\text{u},\quad {}_2^4\text{He}=4.002603\,\text{u},

_1^3\text{H}=3.016049\,\text{u},\quad {}_1^2\text{H}=2.014102\,\text{u}.

The reaction is endothermic. If the helium nucleus is initially at rest, determine the minimum kinetic energy that the incident neutron must possess for the reaction to occur. Choose the closest value. a)

17.6\,\text{MeV}

4.4\,\text{MeV}

22\,\text{MeV}

35.2\,\text{MeV}

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