Alpha coincidence spectroscopy studied with GEANT4
Nuclear Science Symposium and Medical Imaging Conference（2013）
摘要
The high-energy side of peaks in alpha spectra, e.g. 241Am, as measured with a silicon detector has structure caused mainly by alpha-conversion electron and to some extent alpha-gamma coincidences. We compare GEANT4 simulation results to 241Am alpha spectroscopy measurements with a passivated implanted planar silicon detector. A discrepancy between the measurements and simulations suggest that the GEANT4 photon evaporation database for 237Np (daughter of 241Am decay) does not accurately describe the conversion electron spectrum and therefore was found to have discrepancies with experimental measurements. We describe how to improve the agreement between GEANT4 and alpha spectroscopy for actinides of interest by including experimental measurements of conversion electron spectroscopy into the photon evaporation database.
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关键词
alpha-particle spectra,alpha-particle spectroscopy,electron spectroscopy,evaporation model,high energy physics instrumentation computing,nuclear structure,nuclei with mass number 220 or higher,silicon radiation detectors,237np geant4 photon evaporation database,241am alpha spectroscopy measurements,241am decay daughter,geant4 simulation results,actinide alpha spectroscopy,alpha coincidence spectroscopy,alpha spectra high-energy peak side,alpha-conversion electron,alpha-gamma coincidences,conversion electron spectroscopy experimental measurements,conversion electron spectrum,measurement discrepancy,passivated implanted planar silicon detector,simulation discrepancy,geant4,alpha spectrometry,conversion electrons,databases,spectroscopy,photonics,silicon,isotopes,detectors
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