How to calculate the threshold energy of (n,n') reactions?

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SUMMARY

The discussion focuses on calculating the threshold energy of the 89Y(n,n')89mY reaction, specifically addressing the Q-value determination. The Q-value for this reaction is established at 909.15 keV, which is linked to gamma-ray energy of 909.157 keV. The mass of reactants and products remains constant in this scenario, simplifying the calculation process. For further details, the source provided is a document from the International Atomic Energy Agency (IAEA).

PREREQUISITES
  • Understanding of nuclear reactions, specifically (n,n') reactions.
  • Familiarity with Q-value calculations in nuclear physics.
  • Knowledge of gamma-ray energy and its significance in nuclear reactions.
  • Access to nuclear mass data for accurate calculations.
NEXT STEPS
  • Research the principles of nuclear reaction Q-value calculations.
  • Study the significance of gamma-ray energy in nuclear physics.
  • Explore the IAEA resources for detailed nuclear data.
  • Learn about the implications of low Q-values in nuclear reactions.
USEFUL FOR

Nuclear physicists, researchers in nuclear energy, and students studying nuclear reactions will benefit from this discussion.

dsaha
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Let us take the example of 89Y(n,n')89mY reaction. In the calculation of Q value we require mass of reactants and products. Both are same here. Then how to calculate the Q value of this reaction or how to calculate the threshold energy of this type of reactions?
 
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dsaha said:
Then how to calculate the Q value of this reaction or how to calculate the threshold energy of this type of reactions?
see the data below
refer to the source - http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/36/116/36116089.pdf

Reaction - '89Y (n, n') 89m Y

gamma-ray energy 909.157

Q-value [keV] 909.15

one gets a low Q-value which is associated with gamma-ray production/absorption.
 

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