In this study, we calculated the theoretical gamma-ray spectra of the first 36 representative elements in groups 1, 2, and 13-18. We found that the width of these atoms' gamma-ray spectra is proportional to the value of the corresponding Rahm's electronegativity (Eg). Based on this, we present a new explanation of the width of the gamma-ray spectra. We also define a new physical quantity, average Doppler shift (ADS). ADS can quantitatively verify that positrophilic electrons in the positron-electron annihilation process are valence electrons. ADS also can express some characteristics of the gamma-ray spectra such as the full width at half maximum (FWHM), and even more general than FWHM in some cases. Both the FWHM and ADS of the gamma-ray spectra in light elements agree with the corresponding Rahm's electronegativity values, respectively. ADS provides strong evidence in favour of Rahm's electronegativity scale. It is expected that this will be useful for understanding the mechanism of the positron-electron annihilation process.

在这项研究中，我们计算了第1、2和13-18组中前36个代表性元素的理论伽马射线谱。我们发现这些原子的伽玛射线谱的宽度与相应的拉姆电负性（Eg）的值成正比。基于此，我们提出了对伽马射线光谱宽度的新解释。我们还定义了一个新的物理量，平均多普勒频移（ADS）。ADS可以定量验证正电子-电子an灭过程中的正电子为价电子。ADS还可以表达伽玛射线光谱的某些特征，例如半峰全宽（FWHM），在某些情况下甚至比FWHM更通用。轻元素中伽马射线光谱的半高全宽和全角全反射都与相应的拉姆电负性值一致，分别。ADS为拉姆的电负性标度提供了有力的证据。期望这对于理解正电子-电子an灭过程的机理将是有用的。