PPT-Radioactivity

For BSc Chemistry General Part I By Dr Kakoli Banerjee Department of Chemistry Aims and Objectives Definition of Radioactivity Discovery of Radioactivity The Pioneers Cause of Radioactivity Nuclear Instability. Sections 32-1 . – 32-9. Physics 1161: . . Lecture . 25. Radioactivity. Spontaneous emission of radiation from the nucleus of an unstable isotope.. Marie Curie. 1867 - 1934. Wilhelm Roentgen. 1845 - 1923. Fourth lecture. Discovery of radio activity. Radioactivity was the first nuclear phenomenon to be discovered , the credit for this discovery goes to the French physicist Henri Becquerel (1896) .. Radioactivity . Lab 8. Generators. Properties:. A radionuclide generator must be sterile and pyrogen-free.. The generator. system may be sterilized either by . autoclaving the entire column . Or by preparing it from sterile materials under aseptic conditions. . G0 = Cell rests (it Their Effect on Health, The Energy Field. and The Immune System. Dr. Donna M. Starita, DVM, Medical Intuitive. … And Effective Ways To Protect Yourself. Electromagnetism: The Phenomenon Associated With Electricity and Magnetism And Their Interactions With Each Other. Artificial Radioactivity. . And Q-value. Consider the nuclear reaction:.  . . 11. Na. 23. + α → [. 13. Al. 27. ] → . 12. Mg. 26. + . 1. H. 1.  . . Z. X. A. + α → [. Z+2. C. n. Definition . Technetium (99mTc) . macrosalb. injection is a sterile. , a . pyrogenic. . suspension of human albumin in the form of irregular insoluble aggregates obtained by denaturing human albumin in aqueous solution. http://www.npl.co.uk/educate-explore/factsheets/ionising-radiation/. We’re surrounded by radioactivity everyday.. Some sources are natural and some sources are anthropogenic (human made.). We’re going to investigate some sources of natural radioactivity found in the environment.. radiation … radioactive material. What are they? . exposure … contamination. Are they the same?. Radioactivity. Spontaneous emission of radiation from the nucleus of an unstable isotope. Disintegration Decay. Background Image courtesy of Dr. Bill Moore, Dept. of Radiology, Stony Brook Hospital. http://www.colin-studholme.net/research/ipag/mrdspect/mrspect3.html. http://www.mwit.ac.th/~Physicslab/applet_04/atom2/Alphae.gif. Fission produces highly radioactive isotopes. All of the highly radioactive materials on earth have been produced by fission.. Cs-137 (Cesium-137). Cs-137 is . produced by nuclear fission . for use in medical devices and gauges. . Joseph T. Hodges. , Adam J. Fleisher, Qingnan Liu, Abneesh Srivastava and David A. Long. Chemical Sciences Division. National Institute of Standards and Technology . Gaithersburg, MD. joseph.hodges@nist.gov. nEXO. collaboration. The University of Alabama. Radon daughter plate-out . as a background source in nEXO. Motivation: Radon daughter background. Radon daughters can deposit on the nEXO detector surfaces while they are exposed to air:. David O. Carpenter, MD. Institute for Health and the Environment. University at Albany. . What Are the Risks?. Risks to human health:. a. Air contamination with volatile organic compounds (VOCs)..