I How Does Binding Energy Affect the Mass of Nucleons?

AI Thread Summary
Binding energy plays a crucial role in the mass of nucleons, as separating a nucleus requires work against the strong force, which affects the overall energy and mass of the system. When nucleons are separated, the energy used does not dissipate but is recoverable when they are re-bound, illustrating the conservation of energy. However, the individual masses of nucleons do not change based on their state as bound or unbound; rather, the mass of the entire system of nucleons can be greater than the sum of their individual masses. This discrepancy arises because the binding energy contributes to the mass of the system rather than altering the mass of the nucleons themselves. Understanding this relationship is essential in nuclear physics and helps clarify the concept of mass-energy equivalence.
Jas
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So we have a nucleus. Let's say its a helium nucleus.

If I want to split this nucleus into its constituent nucleons, I must do work against the strong force which is holding it together. Now that I have done the work, the particles are no longer bound. I have done work against the strong force; where on Earth does the extra energy/mass come from which results in the constituent nucleons being heavier than the nucleus? The energy that was put into the system to separate the nucleons was dissipated in doing work against the force?
 
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Jas said:
The energy that was put into the system to separate the nucleons was dissipated in doing work against the force?
Which way are you going? Up? Or, down hill?
 
Jas said:
The energy that was put into the system to separate the nucleons was dissipated in doing work against the force?
Energy isn't dissipated. The energy is fully recoverable by binding them back together. Energy is conserved.
 
Khashishi said:
Energy isn't dissipated. The energy is fully recoverable by binding them back together. Energy is conserved.
So could you say that:

the energy that was put into seperating the nucleons actually adds to the mass of the individual nucleons, which is the reason as to why they are heavier as constituents?
 
Yes.
 
Jas said:
So could you say that:

the energy that was put into seperating the nucleons actually adds to the mass of the individual nucleons, which is the reason as to why they are heavier as constituents?
No, the masses of the individual nucleons do not depend on whether they are part of a bound nucleus or not.

The energy that goes into separating the nucleons increases the mass of the system of nucleons. The mass of a system of particles generally does not equal the sum of the masses of the individual particles.
 
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