艾伦电负性与原子中正电子湮灭伽马谱的研究  

Allen's Electronegativity and the Positron Annihilationγ-Spectrum in Atoms

作　　者：袁芳 吴钰 马晓光 YUAN Fang;WU Yu;MA Xiaoguang(School of Physics and Optoelectronic Engineering,Ludong University,Yantai 264039,China)

机构地区：[1]鲁东大学物理与光电工程学院,山东烟台264039

出　　处：《鲁东大学学报（自然科学版）》2021年第4期315-319,共5页Journal of Ludong University:Natural Science Edition

基　　金：国家自然科学基金面上项目(11674145)。

摘　　要：本文将理论计算得到的36个原子的正电子湮灭伽马射线谱宽度与艾伦电负性进行对比拟合,发现艾伦电负性与正电子湮灭伽马射线谱宽度之间存在线性相关关系,证明了价电子在正电子湮灭过程中起主要作用。同时将艾伦电负性与描述伽马射线谱的特征值—平均多普勒频移(ADS)进行拟合对比,进一步证明了电负性与正电子湮灭之间存在联系。因为平均多普勒频移是对伽马射线谱积分得到的物理量,包含伽马谱的所有信息,所以平均多普勒频移相比于半高全宽(FWHM)具有更广泛的适用性。这些研究将有助于对正电子湮灭过程的理解。In this paper,the positron annihilation gamma-ray spectrum widths of 36 atoms obtained by theoretical calculation were compared with Allen's electronegativity.It was found that there was a linear correlation between the Allen's electronegativity and the width of the positron annihilation gamma-ray spectrum.It was proved that the valence electron played a major role in the positron annihilation process.The relationship between the electronegativity and positron annihilation was further proved by fitting the Allen's electronegativity with the average Doppler shift(ADS),which is the characteristic value of the gamma-ray spectrum.Because the average Doppler shift is the physical quantity obtained by the integration of the gamma-ray spectrum,which contains all the information of the gamma-ray spectrum,the average Doppler shift has a wider applicability than the full width at half maximum(FWHM).These studies will contribute to the understanding of the positron annihilation process.

关 键 词：艾伦电负性 正电子湮灭 伽马射线谱 半高全宽 平均多普勒频移 

分 类 号：O414.2[理学—理论物理]