Determination of Westcott g-factors for the assay of non-1/v nuclides using k-NAA.

This study examines the impact of the Westcott g-factor on the concentration of elements like In, Ir, Re, Yb, Eu and Lu, measured using neutron capture reactions (n,γ), specifically focusing on those reactions, whose thermal neutron capture cross-sections (σ ) deviate from the conventional '1/v' behaviour. These measurements are quantified using k₀-based neutron activation analysis. The Westcott g-factor for the non-1/v nuclides was calculated using the characterized neutron temperature (T) at PFTS irradiation channel of KAMINI reactor.

Assessing rare earth elements in Indian coal ash using Westcott formalism in NAA and leaching studies.

This study employs Westcott formalism coupled with the internal monostandard approach in -NAA to assess Rare Earth Elements (REEs) in Indian coal ash samples. This method mitigates neutron flux perturbations during irradiation and enables detector efficiency calibration for quantitative analysis. Deviations in thermal capture cross-sections for non-1/ nuclides in REEs were addressed using the Westcott ( )-factor obtained from the ENDF/B-VIII.

Determination of neutron energy spectrum at KAMINI shielding experiment location.

The neutron spectrum at KAMINI reactor south beam tube end has been determined using multifoil activation method. This beam tube is being used for characterizing neutron attenuation of novel shield materials. Starting from a computed guess spectrum, the spectrum adjustment/unfolding procedure makes use of minimization of a modified constraint function representing (a) least squared deviations between the measured and calculated reaction rates, (b) a measure of sharp fluctuations in the adjusted spectrum and (c) the square of the deviation of adjusted spectrum from the guess spectrum.