[ RadSafe ] Po-210: What is a unit?

Ivor Surveyor isurveyor at vianet.net.au
Tue Dec 19 20:20:21 CST 2006

My thanks to all for clearing up the point about a "unit" of Po-210.
  It is a pity the authorities do not tell as the actual quantities 
of Po-210 in SI units.

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