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Modern Physics
Half-Life
t
1
/
2
=
ln
2
λ
=
0.693
λ
t_{1/2} = \frac{\ln 2}{\lambda} = \frac{0.693}{\lambda}
t
1/2
=
λ
ln
2
=
λ
0.693
t₁/₂ = ln 2/λ= 0.693/λ
The time required for half of the radioactive nuclei to decay.
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Variables
t_{1/2}
Half-life
s
\lambda
Decay constant
s⁻¹
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