363701
\(\gamma - {\mathop{\rm rays}\nolimits} \) radiation can be used to create electron-positron pair. In this process of pair production, \(\gamma - {\mathop{\rm rays}\nolimits} \) energy cannot be less than
1 \(5.0\,MeV\)
2 \(1.02\,MeV\)
3 \(4.02\,MeV\)
4 \(15.0\,MeV\)
Explanation:
Energy released by \(\gamma - {\mathop{\rm rays}\nolimits} \) for pair production must be greater than \(1.02\,MeV\) \(\because \) Energy of each electron is \(0.51\,MeV\)
PHXII13:NUCLEI
363702
The minimum amount of energy released in annhilation of electron-positron is
1 \(1.02\,MeV\)
2 \(0.58\,MeV\)
3 \(185\,MeV\)
4 \(200\,MeV\)
Explanation:
Pair annihillation reaction is \({ }_{+1} e^{0}+{ }_{-1} e^{0} \rightarrow\) photons. Rest mass energy of positron or electron is \(0.51\,MeV\). \(\Rightarrow\) Energy released during annhilation is \(1.02\,MeV\).
363701
\(\gamma - {\mathop{\rm rays}\nolimits} \) radiation can be used to create electron-positron pair. In this process of pair production, \(\gamma - {\mathop{\rm rays}\nolimits} \) energy cannot be less than
1 \(5.0\,MeV\)
2 \(1.02\,MeV\)
3 \(4.02\,MeV\)
4 \(15.0\,MeV\)
Explanation:
Energy released by \(\gamma - {\mathop{\rm rays}\nolimits} \) for pair production must be greater than \(1.02\,MeV\) \(\because \) Energy of each electron is \(0.51\,MeV\)
PHXII13:NUCLEI
363702
The minimum amount of energy released in annhilation of electron-positron is
1 \(1.02\,MeV\)
2 \(0.58\,MeV\)
3 \(185\,MeV\)
4 \(200\,MeV\)
Explanation:
Pair annihillation reaction is \({ }_{+1} e^{0}+{ }_{-1} e^{0} \rightarrow\) photons. Rest mass energy of positron or electron is \(0.51\,MeV\). \(\Rightarrow\) Energy released during annhilation is \(1.02\,MeV\).