# Photon Energy deposition in a pure Ge crystal

Here are is the mass attenuation cross sections for Germanium ---

Determine the deposition of photons ranging in energy from 10 eV to 3 MeV in a pure Germanium crystal assuming an infinite block.

Attenuation coefficient about 1/5.323 cm = 0.19 cm or about 2 mm to maybe 2 cm?

Create file containing Photon Energy, ProcessID, step #, Energy Lost, Position for each step a photon takes through the Germanium crystal.

 Date Time 1/26/16 1 hour 1/27/16 1 hour 1/29/16 1 hour 2/4/16 1 hour 2/5/16 3 hour 2/8/16 2 hour 2/9/16 2 hour 2/10/16 1 hour 2/11/16 2 hour 2/14/16 2 hour

|2/16/16||2.5 hour |-

# Results of energy loss in Germanium

Why do SN>1 photons loose energy at Z = -9000?


## 10 eV

1-D plot of events for each step as function of Z

1-D plot of the energy deposited for each step as function of Z

## 500 keV

Change units on Y-axis to Energy (eV?)

"No Backscattering" Do another plot with momentum cut Pz>0

Add 9000 to Z-position to start Ge barrier at zero