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Recoil Energy

by dranger35
Tags: energy, recoil
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dranger35
#1
Apr4-05, 09:28 PM
P: 14
What is the recoil energy (in eV) of a 57Co nucleus
emitting a 14.4 keV gamma ray?

If anyone knows the equation that I can use, thanks.
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dextercioby
#2
Apr4-05, 09:42 PM
Sci Advisor
HW Helper
P: 11,896
Since the energy of the photon is small (i think it's not [itex] \gamma[/itex],are u sure it's not MeV...?),you can use the nonrelativistic formula for KE...

For a nice use of the total momentum conservation law ,assume the nucleus to be initially at rest.

Daniel.


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