LaBr3 Detector Modeling with MCNPX for INL

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LaBr3 Detector Modeling with MCNPX for INL

• Dan Speaker, Robin P. Gardner, Xiaogang Han and
  Libai Xu

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Advanced Compton Spectrometer

• Used for the direct non-destructive
  quantification of the Department of Energys
  remote handled transuranic waste
• Monte Carlo Simulation is a convenient tool to
  predict the suppression factor

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MCNPX vs. MCNP5
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MCNPX Beta Testers

• Design of Shielding in accelerator facilities
• Accelerator-based imaging technology such as
  neutron and proton radiography
• Charged Particles propulsion concepts for
  spaceflight
• Oil Well Logging Applications
• Detection technology using charged particles
  (i.e. abandoned landmines)

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MCNPX vs. MCNP5 Anticoincidence Counting

• First project that was done for INL was done in
  MCNP5
• The only type of tally that was available are
  that for the total spectrum
• Now for this new project, which is primary type
  of project, CEAR has the capacity to run MCNPX
• MCNPX has the capacity to perform Anticoincidence

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LaBr3 as the Primary Detector

• Wavelength of emission is 380nm
  
  
• Density 5.29 g/cc
• FOM 0.25
• Light Yield 63 photons/keV
• Background an issue

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Preliminary calculations
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Test to see whether an Isotropic Source is needed
Total Spectrum
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Test to see whether an Isotropic Source is needed
(cont) Anticoincidence
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Latest Results
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Future Work

• Implement Detector Response Function in MCNPX
  Source Code
• Add Background from La-138 to Measurements

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Questions ???