Co60 In the Nuclear Physics: Gamma Radiation (NP1) experiment we used Co60 as the gamma source, with Aluminium as the ab

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Co60 In The Nuclear Physics Gamma Radiation Np1 Experiment We Used Co60 As The Gamma Source With Aluminium As The Ab 1 (53.16 KiB) Viewed 14 times

Co60 In the Nuclear Physics: Gamma Radiation (NP1) experiment we used Co60 as the gamma source, with Aluminium as the absorber. Co60 also emits beta radiation of around 0.32 MeV. Recall that the no absorber thickness counts didn't fit with the rest of the data. How many 1.6 mm thick Al plates does it take to stop all the beta radiation from reaching the GM tube? Look up the CSDA range for beta radiation of 0.3 MeV energy in Al on the NIST ESTAR database. Convert from the px (g/cm²) value given to the distance x in cm. Thickness of Al required to stop 0.3 MeV betas: x 1.78 x cm In fact we see from the ESTAR database that one Al plate of 0.16 cm should stop betas of up to energy 0.32 * MeV. So after you put one plate in, only gammas are detected by the GM tube. 2nd part: Convert x=0.16 cm to px (g/cm2). What energy is closest to this CSDA range in the table?