Either through gamma decay into electron-positron pairs or straight old beta emission?
Cerenkov radiation is produced when particles going close to the speed of light travel through a medium at a speed faster than the speed of light in that medium (such as electrons through water).
Yeah I know, but is there a relatively simple way of producing it.
That depends on what you mean by "lab conditions". I'd guess you could build a small accelerator in a small lab and observe the effects, but I really don't know for sure.
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