Is the Mass Defect in Heavy Nuclei Well Supported by Scientific Evidence?

  • Context: Graduate 
  • Thread starter Thread starter granpa
  • Start date Start date
Click For Summary
SUMMARY

The discussion centers on the scientific evidence supporting the mass defect in heavy nuclei, specifically addressing the misconception that heavy nuclei might produce stronger magnetic fields than lighter nuclei. It is established that the mass of atoms is determined through ion deflection in external magnetic fields, measuring the charge-to-mass ratio. The conversation clarifies that heavy nuclei do not generate magnetic fields; rather, they exhibit electric charge, which is additive. Misunderstandings regarding charge screening among protons in nuclei are also debunked, emphasizing that equal charges do not screen each other.

PREREQUISITES
  • Understanding of atomic mass measurement techniques
  • Familiarity with magnetic field interactions with charged particles
  • Knowledge of electric charge properties and behavior
  • Basic concepts of nuclear physics and mass defect
NEXT STEPS
  • Research atomic mass measurement techniques using magnetic deflection
  • Explore the principles of charge-to-mass ratio in ionized particles
  • Study the effects of electric fields on charged nuclei
  • Investigate the concept of charge screening in nuclear physics
USEFUL FOR

This discussion is beneficial for nuclear physicists, researchers in atomic science, and students studying the properties of heavy nuclei and their mass characteristics.

granpa
Messages
2,268
Reaction score
7
how sure are we that heavy nuclei are less massive than the sum of their constituent particles? the masses of atoms are determined by sending their ions through magnetic fields and measuring how much they are deflected. how do we know that heavy nuclei don't simply produce, at any given velocity, slightly stronger magnetic fields than lighter nuclei?
 
Last edited:
Physics news on Phys.org
The nuclei bend in Magnetic fields due to their own charge. The magnetic field is external, the only thing you are measuring of the nuclei is their charge vs. mass ratio.

So there is not a magnetic field beeing produced by the nucleus.. only electric charge, which electric field is additative.

There was a crackpot here almost a year ago who claimed that the other protons in the nuclei whould sheild the charge from the protons inside, hence resulting in a smaller net charge than the sum of the constituent protons... but as he didn't know, equal charges do not screen...
 

Similar threads

  • · Replies 10 ·
Replies
10
Views
6K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 29 ·
Replies
29
Views
3K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 0 ·
Replies
0
Views
3K
  • · Replies 11 ·
Replies
11
Views
4K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 9 ·
Replies
9
Views
2K