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您的检索式：作者名="R.Ravisankar"
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| 1 | Instrumental neutron activation analysis of beachrock samples of South East Coast of Tamilnadu,India显示文摘Element profiles of some beach rock samples collected from South East Coast of Tamilnadu, India have been determined using single comparator method of INAA. The geo-chemical behavior of the elements in the region is discussed. The irradiations were done at thermal neutron flux of ~ 1011 cm-2·s-1 at 20kW power using Kalpakkam Mini Reactor (KAMINI), IGCAR, Kalpakkam, Tamilnadu, India. Around 19 elements have been determined from 15 samples by high-resolution gamma spectrometry. The accuracy and precision were evaluated by assaying the irradiated Standard Reference Material (SRM 1646a Estuarine sediment) and were found to be in good agreement with certified values. | R.RAVISANKAR P.ESWARAN N.P.SESHADERSSAN Bramaji RAO | 2007 | Nuclear Science and Techniques2007，18，4： | 5 |
| 2 | Radioactivity levels in soil of salt field area,Kelambakkam,Tamilnadu,India显示文摘Soil samples in and around salt field area have been analyzed for natural radioactivity concentration using gamma ray spectrometer.The activity concentration for ^(232)Th,^(238)U and ^(40)K are ranged from 27.88 to 45.27 Bq/kg, from BDL to 13.30 Bq/kg,and from 135.54 to 381.28 Bq/kg,respectively.The measured activity concentrations for these radionuclides were compared with world average activity of soil.The average activity concentration of ^(232)Th in the present study is 1.19 times higher than world median value while the activity of ^(238)U and ^(40)K is found to be lower. The absorbed dose rates due to these radionuclides were calculated.The average absorbed gamma dose rate due to the presence of ^(232)Th,^(238)U and ^(40)K in soil samples is 36.99 nGy·h^(-1).These results indicate no radiological anomaly. The data presented in this study will serve as a base line survey for primordial radionuclides concentration in the study area. | R.RAVISANKAR A.RAJALAKSHMI P.ESWARAN V GAJENDIRAN V.MEENAKSHISUNDRAM | 2007 | Nuclear Science and Techniques2007，18，6： | 2 |
| 3 | Measurement of natural radionuclides in bricks and brick-making clays from Cuddalore district,Tamilnadu,India显示文摘In India,bricks as building materials are mainly prepared by clay using the deposited sediments of rivers,and the radionuclide contents in bricks and brick-making clays should vary with origin and geological condition.In this paper,the radionuclide contents of these materials from river bank areas of Cuddalore district,Tamilnadu India are measured by gamma ray spectrometer using NaI(Tl) detector,and compared with those of other countries.The radiation hazard indices,which are evaluated by radium-equivalent(Raeq) activity,are lower than that of NEA-OECD. | G.Viruthagiri R.Ravisankar B.Rajamannan K.Thillaivelavan A.Chandrasekaran V.Meenkshisundram | 2010 | Nuclear Science and Techniques2010，21，4： | 0 |
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