Design of a program in Matlab environment for gamma spectrum analysis of geological samples

19th Chilean Physics Symposium 2014

Rojas, M.^1,2 ; Correa, R.^1

Physics Departament, Technological Metropolitan University (UTEM), Santiago, Chile^1

Invited Researcher, Universidad Nacional San Antonio Abad Del Cusco (UNSAAC), Cusco, Peru^2

关键词: Automatic Detection;    Gamma ray spectra;    Gamma spectroscopy;    Gamma spectrum analysis;    Geological samples;    High resolution;    Hyper-pure germanium detectors;    MATLAB environment;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/720/1/012051/pdf
DOI  :  10.1088/1742-6596/720/1/012051

来源: IOP

【 摘 要 】

In this work we present the analysis of gamma ray spectra Ammonites found in different places. One of the fossils was found near the city of Cusco (Perú) and the other in "Cajón del Maipo" in Santiago (Chile). Spectra were taken with a hyperpure germanium detector (HPGe) in an environment cooled with liquid nitrogen, with the technique of high-resolution gamma spectroscopy. A program for automatic detection and classifying of the samples was developed in Matlab. It program has the advantage of being able to make direct interventions or generalize it even more, or make it automate for specific spectra and make comparison between them. For example it can calibrate the spectrum automatically, only by giving the calibration spectrum, without the necessity of putting them. Finally, it also erases the external noise.