Inelastic and elastic scattering and absorption.

samedi 1 février 2014

I have to write some training on the following and I really have no idea. Is this correct? Any help is greatly appreciated;)



Inelastic scattering

In inelastic scattering, a neutron collides with and is temporarily absorbed by the nucleus of the target particle. This excites the nucleus, causing it to release gamma radiation and another neutron. Both the neutron and the target particle ‘scatter’ in different directions. As the neutron continues to collide with target particles, it loses more energy and is therefore more likely to experience an elastic scattering.



Elastic scattering

In elastic scattering, the neutron is at a lower energy state and so bounces off the target nucleus, but in the process it shares its kinetic energy with the target nucleus, causing the neutron to change direction. The target particle to continues on its original trajectory, but at a higher velocity.



Absorption

In absorption, the lower energy neutron collides with the nucleus of an atom that has the same mass and as a result is captured forming a heavier nucleus. When a neutron is captured, the heavier nuclear becomes unstable and decays, releasing gamma radiation.



Measuring

Inelastic scattering and absorption can be measured by the amount of gamma radiation they release......and because the radioactive emissions of elements are well known, we can compare the spectra of radiation released with known elements, to determine the concentration of elements within a formation.





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