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Course web nuclear.bau.jo/ju/ju-special-topics/ or

Special Topics in Nuclear Physics 0342797. Course web http://nuclear.bau.edu.jo/ju/ju-special-topics/ or http://nuclear.dababneh.com/ju/ju-special-topics/. Grading. Mid-term Exam 40% Projects and HWs 20% Final Exam 40%.

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Course web nuclear.bau.jo/ju/ju-special-topics/ or

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  1. Special Topics in Nuclear Physics 0342797 Course web http://nuclear.bau.edu.jo/ju/ju-special-topics/ or http://nuclear.dababneh.com/ju/ju-special-topics/ Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  2. Grading Mid-term Exam 40% Projects and HWs 20% Final Exam 40% • Homeworks and small projects are due after one week unless otherwise announced. • Remarks or questions marked in red without being announced as homeworks should be also seriously considered! • Some tasks can (or should) be sent by email. Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  3. Main Project • Please do your own thorough research on relevant topics you may find appropriate. • Provide your suggestion next week. • Finaldecision on the subject of your project should be taken before the end of February. • Due date for writtenversion is Tuesday, May 3rd. • Presentation date will be decided later. Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  4. Topic I Monte Carlo Techniques in Radiation Detection and Measurement Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  5. Design a setup. Optimize a setup. Geometry, materials, orientation, fields, electronics, acquisition, analysis … Save money and time. Calibrate a setup … ! Solve chronic issues. More through examples … Why MC … ? Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  6. A toolkit. CERN. High-energy physics … ! Low-energy  nuclear, accelerator, astro, medical, environmental … C++. Unix flavors, Linux, Cygwin on Windows. Geant4 Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  7. Geometry of the system (Modeling). Materials. Fundamental particles of interest. Primary events. Physics processes governing particle interactions with materials and fields. Storage of events and tracks. Visualization of the detector and particle trajectories. Analysis of simulation data at different levels of detail and refinement. Simulate what … ? Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  8. Define physics, geometry, materials, particles …… etc… Random number generator. Fast processors  large number of “events”. Event  primary  interaction  secondaries  interaction    detector  response … Simulation vs. calculation … How ? Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  9. A gamma spectrometer Modeling an ORTEC GMX Detector. Lateral view Top view Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  10. G4double a; G4double z; G4double density; G4String name, symbol; G4int ncomponents; G4double fractionmass; a = 14.007*g/mole; G4Element* elN = new G4Element(name="Nitrogen", symbol=" N" , z=7., a); a = 15.999*g/mole; G4Element *elO = new G4Element(name="Oxygen", symbol=" O" , z=8., a); density = 1.29*mg/cm3; G4Material * = new G4Material(name="Air ",density,ncomponents=2); Air->AddElement(elO, fractionmass=30.0*perCent); Air->AddElement(elN, fractionmass=70.0*perCent); Material definition Air Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  11. G4double startFi = 0.0*deg; G4double endFi = 360.0*deg; G4double PbCapInR2 = 28.7/2*cm; G4double PbCapHalfh2 = 41.3/2.*cm; G4double AlCuthick =0.2*cm; G4double CuCapOutR = PbCapInR2; G4double CuCapInR = PbCapInR2-AlCuthick; G4double CuCapHalfh = PbCapHalfh2; G4Tubs *CuCap_tube= new G4Tubs("CuCap_tube",CuCapInR,CuCapOutR,CuCapHalfh,startFi,endFi); G4LogicalVolume *CuCap_log = new G4LogicalVolume(CuCap_tube,Cu,"CuCap_log",0,0,0); G4double Pos_x = 0.0*cm; G4double Pos_y = 0.0*cm; G4double Pos_z = 6.95*cm; G4VPhysicalVolume *CuCap_phys = new G4PVPlacement(0,G4ThreeVector(Pos_x,Pos_y,Pos_z),CuCap_log,"CuCap", World_log,false,0); Volumes Daughter Mother Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  12. Physics … ! #include "G4ComptonScattering.hh" #include "G4GammaConversion.hh" #include "G4PhotoElectricEffect.hh" void XriPhysicsList::ConstructEM() { theParticleIterator->reset(); while( (*theParticleIterator)() ){ G4ParticleDefinition* particle = theParticleIterator->value(); G4ProcessManager* pmanager = particle->GetProcessManager(); G4String particleName = particle->GetParticleName(); if (particleName == "gamma") { pmanager->AddDiscreteProcess(new G4PhotoElectricEffect()); pmanager->AddDiscreteProcess(new G4ComptonScattering()); pmanager->AddDiscreteProcess(new G4GammaConversion()); etc … Other particles are included in a similar manner but with their individual physics processes of interest Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  13. Simulation results exhibit excellent agreement when compared to real documented and experimental data for relative and absolute efficiencies. Validation Relative Efficiency: Manufacturer 50 % Simulation 50.19  1.06 % Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  14. The measured and simulated absolute efficiencies at 662 keV of 137Cs are (0.6232  0.0050)% and (0.6212 ± 0.0079)%, respectively. Relative error of 0.32%. 137Cs is summing free. So what about Correction Factors … ?!!! Absolute Efficiency Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

  15. Spectra … Experiment vs. simulation Special Topics in Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh).

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