252CF

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• characteristics of the radiations from 252Cf

• We have 0.87 MeV gammas from 252CF

• From W.R. Leo the range for 1 MeV gammas in Pb is about 1 [math]\mbox{g/cm^2}[/math]

[math] x = \frac{1\ g/cm^2} {11.35\ g/cm^3} \approx 0.1\ cm  [/math]

• We need 0.1 cm of Pb to completely stop gammas from 252CF