夜光表的镭辐射到底有多大? - 知乎
Edward Russak · University at Buffalo, The State University of New YorkI believe Ra-226 has a specific activity of 1 Ci/gm, which would be about 10 E10 Bq/Kg if my math is correct. Hard to imagine the
Edward Russak · University at Buffalo, The State University of New YorkI believe Ra-226 has a specific activity of 1 Ci/gm, which would be about 10 E10 Bq/Kg if my math is correct. Hard to imagine the
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