One way to create such short bursts of gamma rays is through the collision — and subsequent annihilation, as the mass of those particles converts into energy — of an electron and a positron.
制造伽马射线短脉冲的一种方法，是电子与正电子的碰撞——之后的湮灭，使粒子的质量转化为能量。
2
Optimum location of nitrogen and vanadium in the V-N-vacancy complex is determined, according to the result of the positronannihilation lifetime experiment and minimizing the total energy.
根据正电子湮没寿命实验的结果和总能量极小原理，确定了V和N在V - N -空位复合体中的最佳占据位置。
3
One signature of positron-electron annihilation is gamma rays carrying 511 thousand electron-volts (keV) of energy.