Abstract
Isomeric cross-section ratios (ICSR) σ g/σ m for the 4;6;8He-induced reactions of Sr isotopes giving rise to 89mg Zr isomeric pair (Jπ = 9/2+, T 1 2/(g) = 3:27 d; Jπ = 1/2−, T 1 2/(m) = 4:18 min) are calculated using a statistical model approach. ICSR of the reactions 86Sr(α; n)89mgZr and 87Sr(α; 2n)89mgZr measured by us earlier in the energy range E = 17−29 MeV are used as a test. Calculations and analysis of ICSR of reactions produced by unstable projectiles are performed for the first time. The dependence of obtained values on the projectile neutron number is discussed.
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