[en] An accurate knowledge of neutron induced reaction/fission cross sections plays a vital role in the design and safe operation of various nuclear systems such as fission power plants, fusion devices, generation IV nuclear reactors and accelerator driven sub critical systems (ADSS). The activation cross sections have direct applications in estimating the radiation levels and decay heat of materials that have been exposed to radiation fields. The International Atomic Energy Agency-Exchange Format (IAEA-EXFOR) database shows that a significant discrepancy as well as wide gap exists in the measured experimental data for large number of neutron induced reactions in the region of fast and thermal energies. In view of this, we are measuring the neutron induced cross sections for materials to measure neutron flux, structural materials and other reactor based materials at different energies using activation and off-line gamma ray technique. The experimentally measured cross sections are being compared with the evaluated nuclear data libraries of ENDF/B-VII.1, JENDL4.0, TENDL-2010 and also with EXFOR database. The measured cross sections were also estimated theoretically using computer code TALYS over neutron energies from threshold to 20 MeV. Some of our recent results will be presented in this talk. (author)

[en] The α induced reactions are important to study due to the breakup problem of the projectile as its binding energy is large. The study of α-induced reactions and their possible isomeric cross-section ratio (ICR) have significant importance for testing nuclear models. The cross section production of isomeric states is more difficult to be predicted than for the total reaction channels due to the detailed structure of the residual nucleus has been taken into consideration. The ¹⁰⁹Ag(α, n)¹¹²In reaction has been studied theoretically in the present work. The present work describes the scarcity of experimental data. More measurements are needed for this reaction channel to validate the theoretical calculations

[en] Highlights: • Rh mirror like thin films are fabricated by PLD technique for FM application. • Rh thin film FMs are irradiated with 10, 20, and 30 keV D ion beam. • Effect of D ion beam irradiation on Rh FM’s reflectivity is investigated. - Abstract: The effect of deuterium ion beam irradiation on the reflectivity of mirror-like pulsed laser deposited (PLD) thin film of rhodium is reported. The deposition parameters; target-substrate distance and background helium gas pressure were optimized to obtain the good quality rhodium films, of higher thickness, oriented preferentially in (1 1 1) plane. The rhodium thin films deposited at optimum PLD parameters were exposed to 10, 20, and 30 keV deuterium ion beam. The changes in surface morphology and UV–Visible–FIR reflectivity of mirror-like rhodium thin films, as a function of energy of deuterium ion beam, after exposure are reported