"Cherenkov radiation" meaning in English

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          "ref": "2006, Eric Nylund, Halo: Ghosts of Onyx, New York: Tor, →ISBN, →OCLC, page 187:",
          "text": "They were going to remain stealthed, no matter what the cost, and fissile materials exiting Slipspace lit up with Cherenkov radiation—a signal flare to any Covenant ship within light-minutes.",
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  "lang_code": "en",
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  "word": "Cherenkov radiation"
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