IN-SITU COMPOSITIONAL ANALYSIS AND PROVENANCE STUDY OF THE HISTORIC TERENGGANU STONE (THE INSCRIBED STONE “BATU BERSURAT”) USING NEUTRON-INDUCED PROMPT GAMMA-RAY TECHNIQUES (NIPGAT)
“Batu Bersurat Terengganu (inscribed stone)” is the oldest artifact with Jawi writing on it. The artifact proves that the Kingdom of Terengganu exist earlier than 1326 or 1386. To date, a lot of studies on the content of the inscription have been carried out by historians and archaeologists, but no scientific investigation about the material composition and its provenance has been performed. This paper focuses on the study of the origin of the Batu Bersurat Terengganu using Neutron-Induced Prompt Gamma-Ray Techniques (NIPGAT). Portable NIPGAT system has been designed and developed based on volumetric measurement methods and it will be considered as a non-destructive testing. The system uses low activity of californium-252 (Cf-252) neutron radioactive sources, gamma ray spectroscopy and special computer software to carry out the investigation. The study found that the Batu Bersurat Terengganu is made of dolerite based on the elemental composition of the stone. Although most of the scientific data for the study of the origin are already obtained, but further research is still ongoing to complete the scope of this study.