Measurement of Cross Sections for 50Cr(n,2n)49Cr and 52Cr(n,2n)51Cr Reactions Induced by 13.5—14.6MeV Neutrons
- Received Date: 2004-09-23
- Accepted Date: 1900-01-01
- Available Online: 2005-07-05
Abstract: Cross sections for (n,2n) reactions are measured on chromium isotopes at the neutron energies of 13.5—14.6MeV using the activation technique. The data of the cross sections are reported for the following reactions: 50Cr (n,2n)49 Cr and 52Cr (n,2n)51 Cr. The cross sections of 50Cr (n,2n)49 Cr reaction are 3.4±0.2,6.8±0.3,21.5±1.0 and 25.0±1.2mb at the neutron energies of 13.5±0.3 ,14.1±0.2,14.4±0.3 and 14.6±0.3MeV incident neutron energies,respectively.The cross sections of 185±10,193±9,258±13 and 332±16mb for 52Cr (n,2n)51 Cr reaction are given at the neutron energies of 13.5±0.3 ,14.1±0.2,14.4±0.3 and 14.6±0.3MeV,respectively.The samples wrapped in cadmium foil are irradiated in order to avoid the effect of 50Cr (n, g)51Cr reaction induced by thermal neutron to 52Cr (n,2n)51Cr reaction,and the measured results are compared with published data. Neutron energies are determined by the method of cross-section ratios of 90Zr(n,2n) 89m+gZr and 93 Nb(n,2n) 92mNb reactions, and the neutron fluencies are determined using the monitor reaction 93 Nb(n,2n) 92mNb.