In gamma spectrometry, energy is deposited in the crystal and the e from valence band gets excited to he conduction band. Both the bands have degenerate energy levels. More the energy deposition, more is the no. of e-h pair. There is no difference in the energy of the e or hole. Then how the energy info is reconstructed in the gamma spectrum? Assume 662 kev and 1460keV gamma is incident simultaneously of equal activity of 1nCi and counting by HPGe detector.

In gamma spectrometry, energy is deposited in the crystal and the electron from the valence band gets excited to the conduction band. Both bands have degenerate energy levels. More the energy deposition, more is the no. of electron-hole pair. There is no difference in the energy of the electron or hole. Then how the energy info is reconstructed in the gamma spectrum? Assume 662 keV and 1460 keV gamma is incident simultaneously of equal activity of 1 nCi and counting by HPGe detector.