- #1
genloz
- 76
- 1
I recently had a test question posed to me that asked firstly for an explanation of the terms in the semi empircal mass forumla (which I gave correctly) but then went on to ask:
For
[tex]^{40}_{20}Ca[/tex]
and
[tex]^{208}_{96}Pb[/tex]
estimate the fraction of the binding energy provided by the surface and coulomb terms, and comment on the significance of these results...
So I estimated:
Pb
Surface: 17.23*(208)^(2/3) = 604.868
Coulomb: (0.714*96^2)/(208^(1/3)) = 1110.58
Ca
Surface: 17.23*(40)^(2/3) = 201.52
Coulomb: (0.714*20^2)/(40^(1/3)) = 83.5
But could not work out at all what the significance was... I have a feeling the same question will be on the exam, so I was wondering if anyone could give me a clue please?
For
[tex]^{40}_{20}Ca[/tex]
and
[tex]^{208}_{96}Pb[/tex]
estimate the fraction of the binding energy provided by the surface and coulomb terms, and comment on the significance of these results...
So I estimated:
Pb
Surface: 17.23*(208)^(2/3) = 604.868
Coulomb: (0.714*96^2)/(208^(1/3)) = 1110.58
Ca
Surface: 17.23*(40)^(2/3) = 201.52
Coulomb: (0.714*20^2)/(40^(1/3)) = 83.5
But could not work out at all what the significance was... I have a feeling the same question will be on the exam, so I was wondering if anyone could give me a clue please?