قياس النشاط الاشعاعي الطبيعي لنماذج من تربة بعض مدارس محافظة القادسية

Abstract EN

To measure the radioactivity of soil some schools in qadsiyah governorate, (20) locations had been selected to take samples from this schools, The gamma rays spectral measurements were done for all samples by using Iodide Sodium activated by Thallium NaI(Tl), its dimension 3"× 3".

The quality activity for thorium 232Th, uranium 238U and potassium 40K in the studied models is between (11.235 )Bq/Kg to (27.365)Bq/Kg and average (17.957)Bq/Kg, (8.125)Bq/Kg to (15.264 )Bq/Kg and average ( 11.828)Bq/Kg, (180.246)Bq/Kg to (378.246)Bq/Kg and average (302.769)Bq/Kg respectively.

The equivalent radium was calculated and ranged between (35.176 )Bq/Kg to (77.330)Bq/Kg and average (59.667)Bq/Kg, and the activity concentration index (Iγ) was to be between (0.247) Bq/Kg to (0.584) Bq/Kg and average (0.450) Bq/Kg, The internal risk coefficient ranged between (0.136) Bq/Kg to (0.242) Bq/Kg and average(0.193) Bq/Kg, External risk coefficient was calculated and its value ranged between (0.095) Bq/Kg to (0.209) Bq/Kg and average (0.161) Bq/Kg, The values of orbed dose in air ranged from (16.110)nGy/h to ( 37.002) nGy/h and average (28.617)nGy/h, The values of effective annual internal dose was between (0.474)mSv/y to (1.089)mSv/y and average (0.842)mSv/y and the effective dose of the annual external dose was between (0.119)mSv/y to (0.272)mSv/y and average (0.211)mSv/y.

By comparing the results with internationally, It was found that the levels of radiation for samples studied within the permissible limits globally