J Med Phys. 2010 Oct;35(4):242-6.Indoor radon survey in a university campus of Nigeria.Obed RI, Lateef HT, Ademola AK.Department of Physics, University of Ibadan, Nigeria.AbstractCR-39 tracketch detectors were used for the measurement of (222)Rn concentration in 24 offices in Nigeria's oldest university campus in order to estimate the effective dose to the occupants from (222)Rn and its progeny. The dosimetric measurements were made over a period of 3 months. Questionnaires were distributed and analyzed. The radon concentration ranged from 157 to 495 Bq/m(3), with an arithmetic mean and standard deviation of 293.3 and 79.6 Bq/ m(3), respectively. The effective dose to the workers was estimated and this varied from 0.99 to 3.12 mSv/ y, with a mean of 1.85 mSv/y. The radon concentrations were found to be within the reference levels of ICRP. ```````````````````````````````````R. William Field, PHDEmail: bill-field@uiowa.edu``````````````````````````````````` ********** RN PROF (Subscription changes - archives) - http://list.uiowa.edu/scripts/wa.exe?A0=RADONPROFESSIONALS ***********