The k0-based internal monostandard neutron activation analysis (IM-NAA) method was used for the analysis of 30 large and non-standard
geometry ancient pottery samples obtained from Buddhist sites of Andhra Pradesh, India. One freshly finished pottery and a
sun-drenched pottery were also analyzed for comparison. Samples were irradiated in thermal column facility of Apsara reactor
and also in graphite reflector position of critical facility of Bhabha Atomic Research Centre. Radioactive assay was carried
out using a 40% relative efficiency HPGe detector coupled to MCA. Concentration ratios of 15 elements with respect to Sc were
determined. The La/Ce values as well as statistical cluster analysis utilizing concentration ratios of elements were used
for grouping/provenance of the potteries.