Study of Excitation Functions of (p, n) Reactions for 56Fe and 57Fe Target from Threshold to 30 MeV

The theoretical calculation of the cross section for formation of 56,57co in (p, n) reaction from 56,57Fe target have been studied from reaction threshold to 30 MeV using TALyS-1.4 nuclear model reaction code whereby we have studied major nuclear reaction mechanisms, including direct, pre-equilibrium and compound nuclear reactions. These calculations were carried out by adjusting the effective imaginary potential, level density and shell damping parameters. It is observed that an excellent agreement between the theoretical calculated and experimental data is obtained with minimal effort on parameter fitting. we have also observed that there is significant contribution of pre-equilibrium emission in (p, n) reaction cross-section of 56Fe and 57Fe. The systematic increase in (p, n) cross-sections with increasing neutron number in reactions induced by protons on 56Fe and 57Fe is explained in terms of compound and pre-equilibrium mode

Pöschl Teller model for the total cross-section of neutron scattering from ²³²Th

289-294Neutron scattering cross-section of 232Th have been investigated using an attractive potential. On applying the modified Pöschl-Teller model, the total cross-section of the n+232Th in the energy range 5-20 MeV has been calculated. It was compared with the available experimental data and evaluated data of JENDL-4.0, ENDF/B-VII.0 and CENDL-3.1 as well as with the theoretical value from TALYS-1.2 Nuclear Reaction Program, EMPIRE: 2.19 Nuclear Reaction Model Code and are found to be in reasonably good agreement. This supports the validity of the present calculation

Measurement and evaluation of the excitation functions in (α,xn) reactions on Tantalum from 20 to 80 MeV

696-700The excitation function for (α,xn) reactions from 20 to 80 MeV on Tantalum have been calculated using TALYS-1.2 nuclear model code involving the fixed set of global parameters. Level density parameter is varied to get good agreement between the calculated and measured data with minimum effort on parameter fitting. This is of importance required for the validation of nuclear model approaches with increased predictive power. The alpha induced cross-sections provide clues to the problem of nuclear structure and offer the testing ground for ideas about nuclear forces. Accurate knowledge of cross-section in alpha induced reaction at energy levels where resonance occurs is crucial while designing nuclear reactors

Measurement of

The $$^{96}\rm{Zr}(n,\gamma)^{97}Zr$$ reaction cross sections relative to $$^{197}\rm{Au}(n,\gamma)^{198}Au$$ monitor reaction with the neutron energies of 0.61 and 1.05 MeV from the 7Li(p,n)7Be reaction have been measured for the first time by using the activation and off-line $\gamma$-ray spectrometric technique. The error analysis of the experimental data was done by considering the partial uncertainties in various attributes and the correlations between those attributes were reported through covariance analysis. The present experimental cross sections have been compared with the theoretical prediction by TALYS-1.8 using the back-shifted Fermi gas model and Brink-Axel Lorentzian $\gamma$-ray strength functions. The TALYS-1.8 calculations well predicted the present experimental cross sections at both neutron energies. The spectrum averaged neutron capture cross sections of 96Zr obtained in the present work have also been compared with the evaluated cross sections from ENDF/B-VIII.0, JENDL-4, JEFF-3.3, CENDL-3.1 and TENDL-2015 libraries. They are found to be in close agreement with the TENDL-2015 and CENDL-3.1 libraries at the neutron energies of 0.61 and 1.05 MeV