Given the following particle masses:
\(m_p=1.0072~\text{u}\) (proton)
\(m_n=1.0087~\text{u}\) (neutron)
\(m_e=0.000548~\text{u}\) (electron)
\(m_\nu=0~\text{u}\) (antineutrino)
\(m_d=2.0141~\text{u}\) (deuteron)
Which of the following processes is allowed, considering the conservation of energy and momentum?
1. | \(n+p \rightarrow d+\gamma\) |
2. | \(e^{+}+e^{-} \rightarrow \gamma\) |
3. | \(n+n\rightarrow \text{}\) deuterium atom (electron bound to the nucleus) |
4. | \(p \rightarrow n+e^{+}+\nu\) |
1. | kinetic energy | 2. | mass |
3. | momentum | 4. | all the above |