Abstract
A systematic investigation was carried out on115In to determine the contribution of different reactions to the total non-elastic cross-section in the 13.43 and 14.84 MeV incident neutron energy range. All the major components ofσ NE were measured with exception of theσ g(n, n′) cross section. An analytical expression is recommended to estimate theσ NE data as a function of mass number at En=14.1 MeV. By the knowledge ofσ NE, the energy dependence ofσ g(n, n′) could be deduced. The isomeric cross section ratios both for (n, 2n) and (n, n′) processes were also determined in the given energy range. The present experiment proves the dependence ofσ m/(σ g+σ m) ratio on the spin value (I m) of the isomeric state in the (n, 2n) reaction. Excitation functions of the (n, 2n), (n, n′) (n, p) and (n∶ p, α) reactions calculated by STAPRE code show good agreement with the experimental results.
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