论文标题
在室温下分子的正电子通知过程中的伽玛 - 射线光谱
Gamma -ray spectra in the positron-annihilation process of molecules at room temperature
论文作者
论文摘要
在这项研究中，开发了一种完全自洽的方法，以同时在分子中获得正电子和电子的波函数。正电子在室温下的波函数，其特征能量约为0.04美元，EV $，用于分析其在氦，霓虹灯，氢和甲烷分子中歼灭的实验结果。正电子和分子之间的相互作用在歼灭电子 - 尖齿对的伽马射线光谱中提供了显着的校正。还观察到，高阶相关性在光谱中几乎没有校正，因为低能正电子和电子之间的相互作用无法将电子驱动到激发的电子状态。必须进行更准确的研究，这些研究必须考虑正电子对 - 电子对状态和核的振动状态的耦合。
In this study, a fully self-consistent method was developed to obtain the wave functions of the positron and electrons in molecules simultaneously. The wave function of a positron at room temperature , with a characteristic energy of approximately $0.04 eV$, was used to analyse the experimental results of its annihilation in helium, neon, hydrogen, and methane molecules. The interactions between the positron and molecule provide a significant correction in the gamma-ray spectra of the annihilating electron--positron pairs. It was also observed that high-order correlations offered almost no correction in the spectra, as the interaction between the low-energy positron and electrons cannot drive the electrons into excited electronic states. More accurate studies, which consider the coupling of the positron--electron pair states and vibration states of nuclei, must be undertaken.
