The (n,2n) cross sections of ⁸⁵Rb, ¹⁰⁷Ag and ¹⁸¹Ta at 14.6 MeV

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.