| 单词 | gamma-ray astronomy |
| 释义 | gamma-ray astronomy Astronomy involving gamma-ray photons (with energies in excess of 100 MeV). The cosmic radiation with the highest energy can be detected by electron-photon cascades, which take place in the atmosphere. Gamma rays having lower energies can only be detected above the atmosphere. Many high-energy processes in astrophysics are responsible for the production of gamma rays; one example is the decay of neutral pions. An interesting phenomenon is the gamma-ray burst . These events last for a few seconds, during which they are the strongest source of gamma rays in the sky. Many theories have been put forward to explain gamma-ray bursts |
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