Measurement of (n,p) and (n,α) Reaction Cross Sections on Some Isotopes of Nickel in the Energy Region of 5 to 10 MeV Using a Deuterium Gas Target at a Compact Cyclotron

Activation cross sections of some neutron-induced reactions in the energy range of 13.82–14.71 MeV

The cross sections of the reactions 70Zn(n,2n)69mZn,74Ge(n,α)71mZn and 90Zr(n,2n)89m,gZr in the energy range of 13.82–14.71 MeV were measured by the activation technique in combination with HPGe detector γ-ray spectroscopy. The measured results were compared with other experimental data and with the data given in the library TENDL-2019. A nuclear model calculation based on the code TALYS-1.8 was also performed after adjustment of an input parameter for the spin distribution of level density. The results of this work strengthen the database and could be useful in further evaluation of the data.

New empirical formulae for (n, p) reaction cross sections on stable isotopes from Z= 21 to Z= 51 for energies up to 20 MeV

Neutron Induced reactions on different target nuclei have get impact on many nuclear basic sciences and applications. Due to the lack of literature available experimental data for many targets, empirical formulae for the (n, p) reactions cross section on different targets and different incident neutron energies are formulated. The formulae are used for calculation of excitation functions for target isotopes having atomic numbers in the range from 21 to 51 and neutron energies from 20 MeV down to respective threshold energy of each reaction. The results are compared to the existing experimental results as well as the TENDL-2019 database values.

Cross sections of (n,p), (n,alpha) and (n,2n) reactions on some isotopes of zirconium in the neutron energy range of 10-12 MeV and integral tests of differential cross section data using a 14 MeV d(Be) neutron spectrum

Cross sections were measured for the 90Zr(n,alpha)87mSr, 90Zr(n,2n)89m,gZr, 91Zr(n,p)91mY, 92Zr(n,p)92Y, 94Zr(n,alpha)91Sr and 96Zr(n,2n)95Zr reactions over the neutron energy range of 11.4 to 12.4 MeV and for the 94Zr(n,p)94Y reaction from 9.2 to 12.4 MeV. Nuclear model calculations were performed up to 16MeV. The statistical model incorporating precompound effects reproduces excitation functions of the three major threshold reactions, namely (n,p), (n,alpha) and (n,2n), quite well. Spectrum averaged cross sections were measured using a thick target Be(d,n) neutron field at Ed = 14 MeV. For the same neutron field averaged reaction cross sections were deduced using the excitation functions measured in this work as well as those given in the ENDF/B-VI, JEF-2, JENDL-3.2, BROND and ADL-3 data files. A comparison of the experimental and deduced integral data helped validating the differential data.