Abstract

Harlem Marpaung¹, Jamahir Gultom¹, Zul Alfian¹ and Monica Gabryella¹

DOI : http://dx.doi.org/10.13005/ojc/330157

Measurement of natural radionuclides concentration in Samosirarea of Sumatera island of Indonesia aims to obtain basis data of the content of radionuclides that could be tended in the development of the area. This research was conducted using Neutron Activation Analysis (NAA), which consists of a sampling of soil of SamosirIsland as the residential area and the soil surrounding ofPangururan hot-spring as the recreational area which then samples and standards were prepared. Then irradiated with thermal neutron flux 3.510¹³ n.cm^-2.s^-1 for 1 hour in a nuclear reactor, and then counted using a gamma spectrometer by HPGe detector. The analysis showed that the soil of Samosir Island samples with concentrations of Uranium of (<0.67) ppm and Thorium of (18.00 ± 0.49) ppm and soil surroundingof hot-spring Pangururan detected and found Uranium of (16.83 ± 0. 83) ppm and Thorium of (6.49 ± 0.35) ppm.

NAA; Natural radionuclide; Uranium and Thorium; Samosir Island

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