PPT-Lecture 6 Radioactive Isotopes

Definitions and types of decay Derivation of decay e quations Half l ives and mean lives Secular Equilibrium Useful radiotracers in oceanography E amp H Chpt 5 The chart of the nuclides decay. Radioactivity and quantitative geochronology. Radioactive decay. Marie . Skłodowska. -Curie. Explored spontaneous radioactivity. Shockingly dangerous chemical separations. to isolate and study heavy radioactive elements. 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. Reprocessing is tricky. Reprocessing: separating the elements in the highly radioactive spent fuel. Small reactors that produce medical isotopes reprocess the spent fuel to obtain the highly radioactive isotopes for medical uses.. low-temperature microcalorimeters. Some preliminary ideas and results. Michael W. Rabin. Los Alamos National Laboratory. D.A. . . Bennett. 4. , E. Birnbaum. 1. , . E.M. . Bond. 1. , R.C. Cantor. 5. , M.P. Geersen et al., 2015. Geersen et al., 2015. Wei et al., 2013. Wei et al., 2013. Duputel et al., 2012. GEOL 460 LECTURE . 8. TODAYS MATERIAL:. Geochronology. PREVIEW MATERIAL:. Heat Flow. Note Supplemental Reading on website:. Lecture . 9. Absolute Dating of the Earth. Major Concepts. The discovery of radioactivity in the early 1900’s and the recognition that . radioactive deca. y . (a statistical event) . occurs at a constant average rate for particular unstable isotopes has provided a means of determining the absolute ages of earth materials. Lecture 9. Absolute Dating of the Earth. Major Concepts. The discovery of radioactivity in the early 1900’s and the recognition that . radioactive decay . (a statistical event) occurs at a constant average rate for particular unstable isotopes has provided a means of determining the absolute ages of earth materials. Unscramble the following keywords for today’s lesson:. . Yecad. Iriaovadect. Ootspei. Nsteruon. nadgit. Isotopes . When the nucleus of an atom possesses either too many or too few neutrons compared to the number of protons it becomes unstable. These are called radioactive isotopes. Unstable nuclei split up in a process called radioactive decay and emit radioactive radiation.. FIGURE 01: Simple Bohr-type model of a lithium atom. Radioactive Isotopes. Unstable isotopes decay to other nuclides. The rate of decay is constant, and not affected by P, T, X…. Parent. nuclide = . What number equals the number of protons?. Atomic Number. From the periodic table – . How is the mass of a “regular” (most abundant) atom determined?. Protons Neutrons = Atomic Mass. An Isotope is defined as…. UNIT-I Metabolic pathways in higher plants and their determination. Study of utilization of radioactive isotopes in the investigation of Biogenetic studies.. 1. Study of utilization of radioactive isotopes in the investigation of Biogenetic studies. Radiation refers to the process that is concerned with the passage of energy between places through space. . It is the radiation generated by sun that . regulates the temperature of earth. . . CLASSIFICATION OF RADIATION: ionizing or non-ionizing types. . By . Dr. . Sarab. . Alazawi. Atomic structure. The atom is the smallest part of matter that represents a particular element.. There . are three major atomic (or subatomic) particles: Protons, Neutrons and Electrons. Table below summarizes the characteristics of these three subatomic particles. The masses of the subatomic particles are listed in two ways, grams and . Definitions and types of decay. Derivation . of decay . e. quations. Half l. ives and mean lives. Secular . Equilibrium. Useful . radiotracers . in . oceanography. E & H . Chpt. 5. The chart of the nuclides - decay.