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Determination of natural radioactivity in building materials used in the Rawalpindi/Islamabad area by γ-ray spectrometry and instrumental neutron activation analysis by J.H. Zaidi; M. Arif; S. Ahmad; I. Fatima; I.H. Qureshi is a Physics and Astronomy article available to read on EtoBox.

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Samples of sand and manufactured building materials collected from the Rawalpindi/Islamabad area have been analyzed for the primordial natural radionuclides 238 U, 232 Th and 40 K using g-ray spectrometry. The uranium and thorium contents have also been determined by instrumental neutron activation analysis (INAA). The speci®c activities of these radionuclides in the samples are compared with those of the world averages for soil. The comparison shows that, of the nine samples analyzed, only the three brick samples have higher activities than the world averages for soil. The speci®c activities in these materials, having a radium equivalent activity of less than 370 Bq kg À1 , when evaluated for radiological eects show that all materials meet the external g-ray dose limitation of 1.5 mSv y À1 . The g-spectrometric and INAA techniques complemented each other well in this study.

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Author

J.H. Zaidi; M. Arif; S. Ahmad; I. Fatima; I.H. Qureshi

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0969-8043)

Published

1999

Language

EN

Field

Physics and Astronomy (Physical Sciences)