对这些正电子有一个可能解释，就是它们来自同一种暗物质以正、反物质形式出现的一对粒子的碰撞（物质湮灭），这样的暗物质又被称为“大质量弱相互作用粒子”（WIMP）。
One possible explanation for these positrons is the mutual annihilation of the matter and antimatter forms of a type of dark matter called weakly interacting massive particles, also known as WIMPs.
据称，在两个弱作用大质量粒子碰撞时会发生湮灭，并且放出伽马射线，类似费尔米卫星的探测器能够捕捉到这种信号。
These annihilations are thought to occur when two WIMPs collide, generating gamma-rays which can be picked up by detectors such as those on board Fermi.
正电子与人体组织中的电子发生作用而湮灭，产生两个伽玛射线光子。
These positrons then come into contact with electrons in the body, and the two annihilate, releasing two gamma-ray photons.
应用推荐