Abstract
The (n,2n) cross sections of 85Rb, 107Ag and 181Ta leading to 21 min activity of 84mRb, 24 min activity of 106Ag and 8.1 h activity of 180Ta were measured at a neutron energy of 14.6 MeV. Well-type NaI (Tl) crystals were used for measurement of activities by detecting X-rays, annihilation photons, and gamma rays. 63Cu(n,2n)62Cu and 121Sb(n,2n)120Sb reactions were used for the measurement of neutron flux. The values of the cross sections obtained are 814+or-42, 705+or-32 and 900+or-47 mb respectively.
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