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I- 131
Half life of 8.02 days
Tc-99 m
Half life of 6.01 hours
F-18
Half life of 1.83 hours
I-125
Half life of 59.4 days
Ir-192
Half life of 73.8 days
Co-60
Half life of 5.27 years
Ra-223
Half life of 11.4 days
Cs-137
Half life of 30.17 Years
Z # above 82 (usually alpha)
what elements are radioactive?
Ci= ? dps
3.7 × 10^10 dps
mCi=? dps
3.7 × 10^7 dps
Bq=? dps
1 dps
Decay constant
.693/ HL
Average (Effective) Life
HL/.693
Change in radioactivity formula
A = Ao e-lt
Specific activity
Ci/g
Secular
parent T1/2 is much longer than daughter T1/2
Transient
patent T1/2 is similar to daughter T1/2