Large nuclei to proton ratios reduce repulsion in a nucleus

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Discussion Overview

The discussion revolves around the relationship between neutron-proton ratios in large nuclei and their effects on nuclear repulsion and attraction. Participants explore concepts related to stable and unstable nuclei, specifically addressing how varying these ratios influences the forces at play within the nucleus.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions why a higher neutron-proton ratio would reduce repulsion, referencing a note about nuclear attraction and repulsion.
  • Another participant suggests that a higher neutron-proton ratio allows protons to be farther apart, which could mitigate repulsion due to their electric charge.
  • Some participants argue that the phrase "without adding repulsion" does not imply a reduction in repulsion, but rather indicates that adding neutrons increases nuclear attraction without increasing electrostatic repulsion.
  • There is a contention regarding whether increasing the distance between protons effectively reduces repulsion, with some participants asserting that it does.

Areas of Agreement / Disagreement

Participants express differing views on the interpretation of "without adding repulsion" and its implications for nuclear forces. The discussion remains unresolved, with competing interpretations of the relationship between neutron-proton ratios and nuclear repulsion.

Contextual Notes

Some statements rely on specific definitions of nuclear forces and may depend on assumptions about the interactions between protons and neutrons. The discussion does not resolve the mathematical or conceptual nuances involved.

AnnieM
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Hi, I am new here.
I am just reading over my notes for stable and unstable nuclei and I came across this sentence: 'Large nuclei require a higher neutron proton ratio as this adds more nuclear attraction without adding repulsion'. I was wondering why the large ratio would reduce repulsion?
Thank you for reading.
 
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It allows the protons, with the electric charge, to be farther apart.
 
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DEvens said:
It allows the protons, with the electric charge, to be farther apart.
Thank you very much for your help. I understand now.
 
"Without adding repulsion" does not mean 'reducing' repulsion.
Adding a proton increases nuclear attraction, but also increases electrostatic energy.
Adding a neutron increases the nuclear attraction with no increase in electrostatic repulsion.
 
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Meir Achuz said:
"Without adding repulsion" does not mean 'reducing' repulsion.
In this case it does. It increases the effective distances between protons.
 
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mfb said:
In this case it does. It increases the effective distances between protons.
Thank you
 
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Meir Achuz said:
"Without adding repulsion" does not mean 'reducing' repulsion.
Adding a proton increases nuclear attraction, but also increases electrostatic energy.
Adding a neutron increases the nuclear attraction with no increase in electrostatic repulsion.
Thank you for you help
 
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