|Feb6-13, 03:17 PM||#1|
elastic scattering and target recoil
I understand that in elastic scattering, the incident particle leaves the interaction with the same magnitude of momentum it had initially. But, can there also be a target particle recoil in this case? If the kinetic energy of the incident particle is conserved, how does the target particle acquire kinetic energy in recoiling? I see two possibilities:
1) the target particle acquires energy from the interaction between the two particles (for example, from the electromagnetic field for Rutherford scattering), or
2) the target particle acquires energy from the incident particle, in which case this doesn't meet the definition of elastic scattering. If this is the case, is "elastic scattering" really just an approximation for when the target particle is really heavy compared to the incident particle?
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|Feb6-13, 04:15 PM||#2|
Elastic scattering just means that both particles stay the same afterwards. There is always energy and momentum transfer (otherwise it is no interaction at all).
|Feb6-13, 05:08 PM||#3|
I'm confused. The Wikipedia article on elastic scattering states that the kinetic energy of the incident particle is conserved. If the incident particle's energy doesn't change, and if, from what you say, the target can't acquire energy except through exchange with the incident particle, then what is the point of defining "elastic scattering," if it never actually happens?
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