Nuclear Spallation: Calculating Neutrons per Reaction

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SUMMARY

Nuclear spallation involves the production of neutrons when high-energy protons strike a target. The average number of neutrons produced per reaction can be calculated, although individual reactions yield varying results. The efficiency of neutron production is contingent upon the choice of target materials and the energy of the protons used. Various publications provide detailed neutron yield data for specific energy and target combinations, highlighting the importance of factors such as target lifetime and cooling in optimizing neutron production.

PREREQUISITES
  • Understanding of nuclear reactions, specifically proton-target fusion and fission.
  • Knowledge of neutron yield calculations and statistical averages in nuclear physics.
  • Familiarity with target materials and their properties in high-energy physics.
  • Basic principles of energy measurements in MeV (Mega-electronvolts).
NEXT STEPS
  • Research neutron yield data for various target materials at different proton energies.
  • Explore the effects of target lifetime and cooling on neutron production efficiency.
  • Study the principles of proton-target fusion and its applications in nuclear physics.
  • Investigate publications and studies that detail neutron production in spallation reactions.
USEFUL FOR

Physicists, nuclear engineers, and researchers involved in high-energy particle interactions and neutron production optimization.

Aidan Davis
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When a proton strikes a target with high energy, neutrons are produced. Is the number of neutrons produced calculatable, or random? This reaction would be proton-target fusion, followed by fission. Is the fission random, or is there a way to calculate the average neutrons per reaction? If so, which target materials produce the most neutrons per MeV of proton energy?
 
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The number of neutrons produced by an individual proton is not fixed, but you can calculate the average.
Aidan Davis said:
This reaction would be proton-target fusion
There is no proper intermediate nucleus at high proton energies.
Aidan Davis said:
If so, which target materials produce the most neutrons per MeV of proton energy?
Depends on the proton energy. There are various publications listing neutron yields for energy/target combinations.
Other considerations like lifetime of the target, cooling and so on are important as well.
 

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