Study of gamma spectrometry laboratory measurement in various sediment and vulcanic rocks

International Conference on Advances in Nuclear Science and Engineering 2015

Nurhandoko, Bagus Endar B.^1,2 ; Kurniadi, Rizal^1,2 ; Hadi, Muhammad Rizka Asmara^2 ; Komara, Insan Rizal^2

Physics Department, Faculty of Mathematics and Natural Science, Institut Teknologi Bandung, Indonesia^1

Rock Fluid Imaging Lab., Indonesia^2

关键词: Gamma ray sources;    Gamma ray spectra;    Gamma ray spectrometry;    Gamma spectrometry;    Gamma-ray energy;    Gamma-ray spectroscopy;    Laboratory measurements;    Quantitative study;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/799/1/012027/pdf
DOI  :  10.1088/1742-6596/799/1/012027

来源: IOP

【 摘 要 】

Gamma-ray spectroscopy is the quantitative study of the energy spectra of gamma-ray sources. This method is powerful to characterize some minerals, especially to differentiate rocks which contains among Potassium, Uranium, dan Thorium. Rock contains radioactive material which produce gamma rays in various energies and intensities. When these emissions are detected and analyzed with a spectroscopy system, a gamma-ray energy spectrum can be used as indicator for mineral content of rock. Some sediment and vulcanic rock have been collected from East Java Basin. Samples are ranging from Andesite vulcanics, Tuff, Shale, various vulcanic clay and Alluvial clay. We present some unique characteristics of gamma spectrometry in various sedimentar and vulcanic rocks of East Java Basins. Details contents of gamma ray spectra give enrichments to characterize sample of sediment and vulcanic in East Java. Weathered vulcanic clay has lower counting rate of gamma ray than alluvial deltaic clay counting rate. Therefore, gamma spectrometrometry can be used as tool for characterizing the enviroment of clay whether vulcanic or alluvial-deltaic. This phenomena indicates that gamma ray spectrometry can be as tool for characterizing the clay whether it tends to Smectite or Illite.