To have less than one left, one needs a DF < 1/1000. no. 12%
This happens after 10 half-lives because (1/2)10 = 1/1024, so after 200 minutes (3 hrs 20 min).
• Ratio of total radioisotope activity to total mass of the element present
• Measured in Bq/g or Bq/mole
• Useful if radioactive and non-radioactive isotopes of the same element are in mixture (sample with carrier)
• Maximum Specific Activity in carrier-free samples:
Carrier Free Specific Activity (CFSA)
"CFSA [Bq\/g] \u2248 4.8\\times1018 \/(A\\times T1\/2) for T1\/2 \\space given\\space in\\space days,"
Comments
Leave a comment