caa a22 4500 378897187 CHVBK 20180305123509.0 cr unu---uuuuu 161128e20041201xx s 000 0 eng 10.1524/ract.92.12.945.55107 doi (NATIONALLICENCE)gruyter-10.1524/ract.92.12.945.55107 Determination of natural radioactivity in building materials used in the Karachi area by γ-ray spectrometry and INAA [Elektronische Daten] [Jamshed H. Zaidi, M. Arif, I. Fatima] Samples of sand, stone and manufactured building materials collected from Karachi area have been analyzed for the primordial natural radionuclides 238U, 232Th and 40K using γ-ray spectrometry. The uranium and thorium contents have also been determined by instrumental neutron activation analysis (INAA). The specific activities in these materials, having a radium equivalent activity less than 370Bq kg-1, when evaluated for radiological effects show that all materials meet the external γ-ray dose limitation of 1.5mSv y-1. The γ-ray spectrometric and INAA techniques complemented each other well in this study. © 2004 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Zaidi Jamshed H. aut Arif M. aut Fatima I. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/12/2004(2004-12-01), 945-949 0033-8230 92:12/2004<945 2004 92 ract https://doi.org/10.1524/ract.92.12.945.55107 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.92.12.945.55107 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zaidi Jamshed H. aut NATIONALLICENCE 700 1- Arif M. aut NATIONALLICENCE 700 1- Fatima I. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/12/2004(2004-12-01), 945-949 0033-8230 92:12/2004<945 2004 92 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter