NP/CT · databaseDecay Calculators
Decay calculations
Starting from an initial activity, calculate the remaining radioactivity after a chosen delay (to find the activity at an earlier time, just use negative delay).
Specific assay, residual and injection times
Current activity
Given time and intial acitivty, displays activity at current time/day
Ge Tanks for calibrations
3.31 mCi (122.37 MBq) @ 13-Aug-2012
Volume: 6189 ml
T1/2 = 390168 hrs = 271 days
Enter date for activity
S/N: 8495; Model: CS-20-3 (Siemens)
3.39 mCi (125.43 Bq) @ 05-Sept-2013
Volume: 6189 ml
T1/2 = 390168 hrs = 271 days
Enter date for activity
S/N: 9528; Model: CS-20-3 (Siemens)
3.30 mCi (122.10 Bq) @ 18-Sept-2014
Volume: 6189 ml
T1/2 = 390168 hrs = 271 days
Enter date for activity
S/N: 10519; Model: CS-20-3 (Siemens)
3.35 mCi (123.95 Bq) @ 24-Sept-2015
Volume: 6189 ml
T1/2 = 390168 hrs = 271 days
Enter date for activity
S/N: 11594; Model: CS-20-3 (Siemens)
3.40 mCi (125.65 Bq) @ 04-Oct-2016
Volume: 6189 ml
T1/2 = 390168 hrs = 271 days
Enter date for activity
253 nCi = 9368 Bq @ 1-Jan-2011
T1/2 = 1369200 hrs = 2.605 yrs
3550 Bq on 27-Aug-2014
Enter date for activity