Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Consider an α α -particle just in contact with a 
nucleus. Calculate the coulombic repulsion energy ( i.e. the height of the coulombic barrier between 
and alpha particle) assuming that the distance between them is equal to the sum of their radii
A
23.8517× 
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
where A is mass number
∴ ∴ Total distance in between uranium and 
nuclei
= 8. 06× 
+ 2.06 × 
= 10.12 × 
cm
Now repulsion energy = 
= 
= 
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