1.5 1958 7.0^2802.0 1341 8.0^2542.5 965 10.0^2143.0 729 12.0^1813.5 580 14.0^153(4) 10 μg of natural zinc was irradiated in a thermal neutron flux of 5 × 1012 neutrons cm–^2 s–^1 for one
week. Calculate the induced activity due to^65 Zn which is produced from an (n, γ) reaction on^64 Zn.
The natural abundance of^64 Zn is 48.88% and its activation cross-section to thermal neutrons is 0.50 b.
The half-life of^65 Zn is 245 d.
(5) Natural sodium is monoisotopic and undergoes activation by thermal neutrons as follows: