正 The cross sections for the formation of long-lived products 108Agm(6+,433a),150Eum(5-,36.9a),158Tb(3-,180a)and 178Hfm2(16+,31a)are measured in the(n,2n)reaction on the elementsof 109Ag,151Eu,159Tb and 79Hf at neutron energies of 9.5 MeV and 0.9 MeV,respectively.The neu-tron fluence is obtained through the 197Au(n,2n)196Au reaction.The D(d,n)3He reaction is used as neu-tron source at the tandem accelerator.The present results are compared with the averaged values of theo-retical cross sections and the experimental data.
展开▼