Use GIS technical to draw of the background radiation in selected soil samples in the Najaf sea areaMohammed A. Mohammed, Tabarak S. Hashesh, Faisel G. Mohammed, Rand A. Hayder and Maryam H. AliE3S Web Conf., 633 (2025) 02005DOI: https://doi.org/10.1051/e3sconf/202563302005