用GEANT4研究α符合光谱

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC) Pub Date : 2013-11-02 DOI:10.1109/NSSMIC.2013.6829561

M. Dion, B. Miller, G. Tatishvili, G. Warren

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引用次数: 1

摘要

用硅探测器测量的α光谱峰的高能侧，如241Am，其结构主要是由α转换电子和一定程度的α - γ巧合引起的。我们将GEANT4模拟结果与钝化植入平面硅探测器的241Am α光谱测量结果进行了比较。测量和模拟之间的差异表明，237Np (241Am衰变的子)的GEANT4光子蒸发数据库不能准确地描述转换电子能谱，因此发现与实验测量存在差异。我们描述了如何通过将转换电子能谱的实验测量纳入光子蒸发数据库来改善GEANT4和α光谱对感兴趣的锕系元素的一致性。

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Alpha coincidence spectroscopy studied with GEANT4

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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2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)

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