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

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 absorption1

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 absorption2

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 absorption3

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 absorption4

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

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 factor1

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

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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