相邻道址插值法合成γ能谱

Synthesis of γ Spectra by Interpolation of Adjacent Channel

为实现阵列探测器的γ能谱合成,提出了基于拉格朗日线性插值原理的相邻道址插值法合成γ能谱。使用两个10.16 cm×10.16 cm×40.64 cm探测器组成的阵列进行了方法验证。实验结果表明,用该方法合成的γ能谱的662 ke V全能峰计数相对合成前两个能谱的662 ke V全能峰计数之和偏差为-0.5%,合成能谱的FWHM@662 ke V大于2号探测器、小于1号探测器测得的能谱。

In order to realize the gamma spectrum synthesis of array detectors,an adjacent channel interpolation method based on the Lagrange linear interpolation principle is proposed to synthesize the gamma spectra. The detector array with two 10. 16 cm×10. 16 cm ×40. 64 cm is verified by experiments.The experimental results show that the relative deviation between the sum of the full energy peak（@ 662 keV） counts and the full energy peak counts of the synthetic spectra is-0. 5%,and the FWHM@ 662 keV of the synthetic spectrum is between the FWHM of 2#detector and 1#detector.