Measurement of Au-197(n, gamma)Au-198g reaction cross-section at the neutron energies of 1.12, 2.12, 3.12 and 4.12 MeV

摘要

The Au-197(n,gamma)Au-198 reaction cross-sections at the neutron energies of 1.12, 2.12, 3.12 and 4.12 MeV were determined by using activation and off-line gamma-ray spectrometric technique. The mono-energetic neutron energies of 1.12-4.12 MeV were generated from the 7 Li(p, n) reaction by using the proton energies of 3 and 4 MeV from the folded tandem ion beam accelerator (FOTIA) at BARC as well as 5 and 6 MeV from the Pelletron facility at TIFR, Mumbai. The In-115(n,gamma)(116m) In reaction cross-section was used as the neutron flux monitor. The Au-197(n,gamma)Au-198 reaction cross-section at the neutron energies of 3.12 and 4.12 MeV are reported for the first time. The Au-197(n,gamma)Au-198 reaction cross-sections at 1.12 and 2.12 MeV are close to the literature data of in between neutron energies. The Au-197(n,gamma)Au-198 cross-section was also calculated theoretically by using the computer code TALYS 1.6 and found to be higher than the experimental data of present work and literature data within the neutron energies of 0.8 to 4 MeV.