Radioactive Decay
Timed Decay
Timed Solid Disposal
N=N
o
e
-(0.693t/T
½
)
Initial activity (N
o
)
Decay time (t)
Time units
s
m
h
d
y
Final activity (N)
t = -(T
½
/0.693) * ln(N/N
o
)
Initial activity (N
o
)
Final activity (N)
Decay time (t)
t = -(T
½
/0.693) * ln(D.L./(N
o
/m))
Initial activity (N
o
)
kBq
mass (m)
kg
Decay time (t)
Unit Converter
Find the difference between two dates.
Add or subtract a number of days to a date.
Activity 1
kBq
MBq
GBq
µCi
mCi
Activity 2
kBq
MBq
GBq
µCi
mCi
Date 1
Date 2
Days
Date 1
Days
Date 2