波形脉冲高度校正提高CdTe探测器能量分辨率
Improvement of the energy resolution of CdTe detectors by pulse height correction from waveform
摘要:
由CdTe晶体制成的半导体探测器具有高的γ射线探测效率,并且可以在室温下使用。然而,碲化镉探测器的能量分辨率MeV的γ射线是相当差的,因为显着的空穴捕获效应。我们提出了一种利用信号波形校正脉冲高度的方法来提高能量分辨率,并对662 keV γ射线实现了2.0%(FWHM)的能量分辨率。最佳能量分辨率在-10 ° C至0 ° C之间的温度下实现。
英文摘要:
Semiconductor detectors made of CdTe crystal have high gamma-ray detection efficiency and are usable at room temperature. However, the energy resolution of CdTe detectors for MeV gamma-rays is rather poor because of the significant hole trapping effect. We have developed a method to improve the energy resolution by correcting the pulse height using the waveform of the signal and achieved 2.0% (FWHM) energy resolution for 662keV gamma-rays. Best energy resolution was achieved at temperatures between -10 degrees C and 0 degrees C.
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