Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5454480 | Journal of Radiation Research and Applied Sciences | 2017 | 7 Pages |
Abstract
The paper deals with the study of natural radioactivity in the rocks of Coorg district, Karnataka state. The samples were analyzed by NaI(Tl) based gamma ray spectrometer. The activity of 232Th varies from 16.46 Bq kgâ1 to 160.84 Bq kgâ1 with mean value of 79.05 Bq kgâ1. The activity of 40K varies from 96.72 Bq kgâ1 to 933.68 Bq kgâ1 and that of 226Ra was found to vary from BDL to 34.36 Bq kgâ1. A correlation coefficient of R = 0.81 was found between 232Th activity and 40K activity. The correlation between 226Ra activity and 232Th activity is R = 0.59. The correlation between 40K and 226Ra is R = 0.51. The Radium Equivalent Activity (Raeq) ranges from 46.78Bq kgâ1 to 315.55Bq kgâ1. The absorbed gamma dose rate (D) ranges from 21.28 nGy hâ1 to 141.45 nGy hâ1, with an average of 73.37 nGy hâ1. The radionuclides activity was compared with world average values. The external Hazard index (Hex) varies from 0.12 to 0.84. The internal hazard index (Hin) is in the range 0.15-0.89. The hazard indices were found to be within safety limits.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
M.M. Prakash, C.S. Kaliprasad, Y. Narayana,