Question

Expain the surface energy term in semi empirical mass formula.

Answer 1

Surface energy term in semi empirical mass formula :-

• Nucleon on the surface have fewer neighbors than those in the interior.
• Surface nucleon reduce the binding energy by an amount proportional to their number.
• The number of nucleon is proportional to the surface area.
• Thus surface energy term expressed as

- a_S A^2/3

Where a_s is constant.