Abstract

Quantum statistics and Maxwell-Boltzmann statistics are adopted to calculate distributions of isotopically resolved nuclear fragments emitted in the break-up of nuclear sources assumed to be in chemical equilibrium. Effects of unstable energy level decay in changing the composition of exploded nuclides before their detection are taken into account. The calculated nuclide distributions are compared with experimental emission yields, for all the measured single nuclides, isotopically resolved, with mass numberA between ≈6 and ≈30. Results obtained by using quantum statistics are very close to that ones deduced by Maxwell-Boltzmann statistics. A remarkable agreement is obtained when excitation energy of fragments and unstable energy level decay effects are taken into account.

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