PPT-Radioactivity (

Discovery Most of the nuclides that have been identified are radioactive A radioactive nuclide spontaneously emits a particle transforming itself in the process into a different nuclide occupying a different square on the . 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 . For . B.Sc. 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. Pierre Curie was already a famous scientist before he married Marie Sklodowska in 1895.  This famous couple did not only find true love, they also discovered radium and polonium.  For their groundbreaking research in radioactivity, the couple were awarded the 1903 Nobel Prize in physics.  It was Marie Curie who coined the term "radioactivity", and in her honor, the 1910 Radiology Congress chose the curie as the basic unit of radioactivity.  Pierre died from being run over by a horse drawn wagon, but Marie continued their research, and was eventually awarded a second Nobel Prize, the 1911 prize for Chemistry.  She died in 1934, suffering from pernicious anemia which had undoubtedly been the result of years of radiation exposure.. 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. 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. Nuclear Stability . Nuclear stability . means that nucleus is stable meaning . that it . does not spontaneously emit any kind of radioactivity (radiation). . On the other hand, . if the . nucleus is unstable (not stable), it has the tendency of emitting some kind of . 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. 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. – What is it?. All substance are made of . atoms. . These have . electrons. (e) around the outside, and a . nucleus. in the middle. The nucleus consists of . protons. (p) and . neutrons. (n), and is extremely small. (Atoms are almost entirely made of empty space. What are they? . exposure … contamination. Are they the same?. Radioactivity. Spontaneous emission of radiation from the nucleus of an unstable isotope. Disintegration Decay. Demonstrate Decontamination. 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:. measurements for decommissioning facilities P Fichet (1), C Mougel (1), I Desnoyers (2), P Sardini (3), H Word (4) (1) Den – Service d’Etudes Analytiques et de Réactivité des Surfaces (SEAR 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)..