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。
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Either way, one sign of dark matter particles, researchers think, is a burst of annihilation-induced gamma rays.
科学家们认为，无论是这两种解释的哪一种，暗物质颗粒的一种标志是粒子湮没爆发出的伽马射线。
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One signature of positron-electron annihilation is gamma rays carrying 511 thousand electron-volts (keV) of energy.