Toy model

[Himanshu Sharma]

We say the monopole shift gives a positive contribution because it increases binding, making the system more stable. In toy model A, the added negative charge inside the nucleus lowers the total energy, which may seem contradictory. However, this energy decrease actually reflects stronger attraction, not a negative shift in the physical sense. The “positive” shift refers to increased stability, not a rise in energy value. So, there’s no contradiction—just a difference in how the term is interpreted.

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