Abstract
The radon concentrations and exhalation rates of phosphate rocks samples were measured using a silicon surface barrier detector. In this study, samples were collected from different locations of phosphate mine in Northern Saudi Arabia. The radon concentrations varied from 17 ± 0.5 to 77 ± 1.3 Bq m
−3
, and the radon exhalation rates from these samples ranged from 0.1255 (0.024) to 0.5791 Bq m
−2
h
−1
(0.111 Bq kg
−1
h
−1
. The annual effective doses varied from 0.429 to 1.943 mSv y
−1
. The data were compared with the global values of radon concentration.