Abstract. Soil samples were collected from Al-Najaf governorate, Iraq; these samples were investigated for radon concentrations using CN-85 detector, and for uranium concentrations assessment CN-85 and CR-39 detectors were used. Also, some radiation parameters due to radon concentrations were calculated. Radon concentrations were varied from 506.84 Bq·m-3 to1194.69 Bq·m-3 with an average of 894.21±77.80 Bq·m-3, … تابع قراءة Ali abid abojassim* alpha particles concentrations from some soil samples of al-najaf (iraq)