Nuclear Physics

The number of neutrons accompanying the formation of from the absorption of a slow neutron by followed by nuclear fission is

Bombardment of aluminium by a-particle leads to its artificial disintegration in two ways, (i) and (ii) as shown. Products X , Y and Z respectively, are

is known to undergo radioactive decay to form by emitting alpha and beta particles. A rock initially contained of . If the number of alpha particles that itwould emit during its radioactive decay of to in three half-lives is , then what is the value of ?