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Questions and Answers
Neutron removal cross section (FR) is always equal to the macroscopic removal cross section (ER).
False
Elastic scattering conserves kinetic energy in neutron collisions.
True
Inelastic scattering conserves kinetic energy in neutron collisions.
False
Moderators slow neutrons by inelastic scattering.
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The lower the atomic mass number of the target, the more effective it is as a moderator.
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What is the relationship between the microscopic removal cross section (FR) and the macroscopic removal cross section (ER)?
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Which type of scattering collision conserves kinetic energy in neutron collisions?
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What type of nuclei and neutron energies make inelastic scattering most likely to occur?
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Which materials are effective as moderators for slowing down neutrons through elastic scattering?
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What happens when a nucleus undergoes inelastic scattering?
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Study Notes
Neutron Interactions
- Neutron removal cross section (FR) is always equal to the macroscopic removal cross section (ER).
Scattering Types
- Elastic scattering conserves kinetic energy in neutron collisions.
- Inelastic scattering does not conserve kinetic energy in neutron collisions.
Moderation
- Moderators slow neutrons by inelastic scattering.
- The lower the atomic mass number of the target, the more effective it is as a moderator.
Scattering Conditions
- Inelastic scattering is most likely to occur with high-energy neutrons and heavy nuclei.
Moderator Materials
- Materials with low atomic mass numbers are effective as moderators for slowing down neutrons through elastic scattering.
Inelastic Scattering
- When a nucleus undergoes inelastic scattering, it undergoes an internal energy state change.
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Description
Test your knowledge about neutron shielding cross sections, including microscopic and macroscopic removal cross sections, mass attenuation coefficient, and elastic scattering in neutron shielding calculations.
