Self absorption
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Self Absorption. Photon Attenuation. HW 1. Self-Absorption. Valid for parallel photon emission or far geometries. Self absorption. Calculation vs. Simulation Data from XCOM. http://www.nist.gov/pml/data/xcom/index.cfm. More Realistic. Parallel Photon Emission. Isotropic Photon

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Self Absorption

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Self Absorption

Photon Attenuation

HW 1

Self-Absorption

Valid for parallel

photon emission

or far geometries.

Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).


Self absorption

Calculation vs. Simulation

Data from XCOM

http://www.nist.gov/pml/data/xcom/index.cfm

More

Realistic

Parallel Photon

Emission

Isotropic Photon

Emission

Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).


Self Absorption

Geant4 vs. XCOM for Parallel Photon Emission

But

not

realistic

Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).


Self Absorption

XCOM vs. Geant4for Isotropic Photon Emission

in Close Geometry

Al

Isotropic Photon

Emission

Al

Fe

Fe

Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).


Self Absorption

XCOM vs. Geant4 for Isotropic Photon Emission in Close and Far Geometries

Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).


Geometric Correction Factor

Total Geometric Correction Factor for Self-Absorption and Extended Source

No Coincidence Summing yet …!

Point

Source

Air

Sample

Container

Soil

Extended

Source

Detector

Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).


Geometric Correction Factor

GMX HPGe detector total geometric correction factor kg

for a soil sample of 4 cm height.

Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).


Simulated Efficiency Calibration

Efficiency Calibration of the GMX System for Environmental Samples

Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).


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