PPT-Compound nuclei reactions

北京大学物理学院 技术物理系 裴俊琛 Junchen Pei School of Physics Peking University 20169 Beijing Prepared based on many others slides Introduction. Isotope Geochemistry. Akilia. Gneiss, Greenland. Isotope Geochemistry. Some things we can do with it. Geochronology: Putting a time scale on Earth history. Understanding the formation of the solar system planets. . Chemical . Reactions and. . Reaction . Stoichiometry. James F. Kirby. Quinnipiac University. Hamden, CT. Lecture Presentation. Stoichiometry. The study of the mass relationships in chemistry. Based on the Law of Conservation of Mass (Antoine Lavoisier, 1789). ”Structure of the neutron star crust: experimental and observational. . signatures". May 26-27, 2014, GANIL, Caen, France. Dubna. , Russia. Avazbek NASIROV. Joint Institute for Nuclear Research. Contents of talk. Short information about synthesis of superheavy elements . . in heavy ion collisions.. 2. Significance of nuclear reactions: . V. V. . Sargsyan. *. , . G. G. . Adamian. , N. V. . Antonenko. In collaboration with . W. . . Scheid. , H. Q. . Zhang, D. . Lacroix. , G. Scamps. ECT*, Trento, . Italy. *Joint Institute For Nuclear Research. Dubna. , Russia. Avazbek NASIROV. Joint Institute for Nuclear Research. Contents of talk. Short information about synthesis of superheavy elements . . in heavy ion collisions.. 2. Significance of nuclear reactions: . – What Will Happen. ?. . Within . the Sun. The sun starts out as a ball of . completely uniform composition.. In . the outermost parts, there are no nuclear . reactions at all: . it. ’. s . not hot enough. Goal is to understand reaction mechanisms. Three types of reactions: . Substitution. Redox. Ligand-Based. Primarily substitution reactions. :. M. ost substitution reactions are rapid . but some are slow. Is radiation dangerous? . Is nuclear power a good choice?. . What is nuclear energy?. Are nuclear energy and nuclear bombs both dangerous? . Guiding Questions. Radioactive Decay. Discovered by Antoine Henri Becquerel in 1896. Double-displacement Reaction: . Precipitation. acid-base neutralization. gas-evolving. Single-displacement Reaction. 2. 2. Experiencing Chemical Change. Chemical Reactions. : happening both around you and in you all the time! . Nuclear chemistry is the study of the structure of and the they undergo.. atomi. c nuclei. changes. Chemical vs. Nuclear Reactions. Elements are Formed in Different Ways in our Universe. Nucleosynthesis. Nucleosynthesis. is the process of element (nuclei) formation.. Three types: . Big Bang nucleosynthesis. . Stellar (star) nucleosynthesis. In . your. seat:. With pen/pencil. With Notebook. With Handout. Packet from last class on your desk. Silent and ready for Do Now. After the . bell (2 min). Answer the following riddle:. What . occurs once in a minute, twice in a moment and never in one thousand . Chapter 6: Chemical Reactions. Learning Goals. Identify and predict single displacement reactions.. Single Displacement Reactions. In a . single-displacement . reaction, one element displaces another in a compound. .