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

In summary, calculating the threshold energy of (n,n') reactions involves finding the minimum energy needed for a neutron to collide with a target nucleus and produce a new nucleus with the same number of neutrons. This can be done by determining the difference in mass between the initial and final nuclei and converting it into energy using Einstein's famous equation, E=mc². The threshold energy is an important factor in nuclear reactions as it determines the feasibility and rate of the reaction. Various factors, such as the target nucleus, neutron energy, and spin states, can affect the threshold energy calculation.
  • #1
dsaha
1
0
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?
 
Physics news on Phys.org
  • #2
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.
 

1. What is the definition of threshold energy in (n,n') reactions?

The threshold energy in (n,n') reactions refers to the minimum amount of energy required for a neutron to induce a nuclear reaction with a target nucleus, resulting in the emission of a neutron.

2. How is the threshold energy calculated for (n,n') reactions?

The threshold energy can be calculated using the equation Eth = (mT + mn)c2, where Eth is the threshold energy, mT is the mass of the target nucleus, mn is the mass of the neutron, and c is the speed of light.

3. What factors affect the threshold energy of (n,n') reactions?

The threshold energy of (n,n') reactions is affected by the mass of the target nucleus, the mass of the neutron, and the speed of the neutron. It is also influenced by the spin and parity of the nuclei involved in the reaction.

4. Can the threshold energy of (n,n') reactions be determined experimentally?

Yes, the threshold energy can be determined experimentally by measuring the energy spectrum of the emitted neutrons and identifying the energy at which an increase in neutron intensity occurs.

5. How important is knowing the threshold energy in (n,n') reactions?

The threshold energy is crucial in understanding the behavior of neutrons and their interactions with nuclei. It is also essential in predicting the outcomes of (n,n') reactions and designing experiments for nuclear research and applications.

Similar threads

I Negative Q-value for 7Li(alpha,n) reaction
    • High Energy, Nuclear, Particle Physics
Replies
18
Views
531
I What kind of energy is released in a nuclear fusion reaction?
    • High Energy, Nuclear, Particle Physics
Replies
14
Views
1K
Gibbs free energy of activation and activation energy
    • Chemistry
Replies
4
Views
1K
I Reaction Q value and threshold energy
    • High Energy, Nuclear, Particle Physics
Replies
3
Views
3K
Endothermic and Threshold reactions - Are they Equivalent?
    • Nuclear Engineering
Replies
2
Views
2K
B Assistance finding the nuclear energy difference during nuclear fusion
    • Atomic and Condensed Matter
Replies
5
Views
921
B How many nuclear weapons are needed to make a wormhole?
    • Other Physics Topics
Replies
11
Views
3K
Engineering Tubular Reactor with catalytic walls
    • Engineering and Comp Sci Homework Help
Replies
6
Views
773
Off by order of magnitude when calculating how much calcium is in bone
    • Introductory Physics Homework Help
Replies
8
Views
859
B Thinking about a calendar epoch based on the field of physics
    • Other Physics Topics
2
Replies
49
Views
3K

Hot Threads

Recent Insights

Back
Top