All About Radioactivity
- Think why nucleus is stable even though the electrostatic force between protons with same charges is repulsion
- There is a strong nuclear force between protons that keep them together
- This force is not completely understood
- This force needs protons to be close and is distance dependent
- Neutrons play a stabilizing role in nucleus
- In larger nucleus the ratio of N/P is 1.5 —> This ratio is 1 in smaller nucleus
- Radioactive nucleus are those unstable nuclide that the ratio of P/N is unfavorable
- Decay Constant
- Fraction of atoms that decay per unit of time
- Half life and decay constant:
- Half life = 0.693/decay conctant
page revision: 1, last edited: 10 Nov 2012 21:27