CodyMilne G4Proj

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

Ration of photoelectric cross section to compton scattering is ~100.

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

200 px

100 eV

ratio of photoelectric cross section to compton scattering is ~4

Start with[math] E_{gamma}[/math] = 100 eV

200 px

1 keV

Start with[math] E_{gamma}[/math] = 1 keV

200 px 200 px

10 keV

Start with[math] E_{gamma}[/math] = 10 keV

200 px

100 keV

Start with[math] E_{gamma}[/math] = 100 keV

500 keV

Start with[math] E_{gamma}[/math] = 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

1 MeV

Start with[math] E_{gamma}[/math] = 1 MeV

3 MeV

Start with[math] E_{gamma}[/math] = 3 MeV

Runing Types

nohup ../exampleN02 run1.mac > /dev/null &

Divide canvas into 2 x 5

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