PPT-Gamma-rays and Nuclear Physics

121120 1 Gammarays are ideal probes of a subset of the radioactive isotopes produced in astrophysical transients A number of new gammaray missions are being developed ASCENT COSI LOX AMEGO that will improve sensitivities by over an order of magnitude allowing us to probe more transients and a broader range of isotopes. 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. Radiation for life. Sparks. Insulating materials. Metals are . good conductors. , which means that electric charges move easily through them. Materials such as plastic, wood, glass and polythene are . Wavelength the size of an atom. Frequencies above UV. Uses of X-rays. Used in airports to examine luggage for the presence of dangerous weapons or bombs or for illegal transit of goods. . used to detect structural deficits or cracks in metal objects such as bridges and aircraft that are likely to be missed by the human eye. 24.1 Nuclear Radiation. 24.2 Radioactive Decay (includes decay rates & radiochemical dating). 24.3 Nuclear Reactions (Transmutation. Part only). 24.4 Applications & Effects of Nuclear Reactions (except for radiation dose and intensity/distance). Gerald R. Aben, MD FACR. Department of Radiology. College of Osteopathic Medicine. 6/12/2012. 1. DEPARTMENT OF RADIOLOGY. Nuclear Medicine. 6/12/2012. 2. DEPARTMENT OF RADIOLOGY. Nuclear Medicine. Physiological Imaging. H. . Herrmann (LANL. ). e. -. Next . Steps. Cherenkov detectors . Energy . thresholded. Gas limited to >2.5 . MeV. Solid limited to <~0.2 . MeV. Aerogel. might span the gap. Real . g. -ray spectroscopy (Energy resolved) . 24.1 Nuclear Radiation. 24.2 Radioactive Decay (includes decay rates & radiochemical dating). 24.3 Nuclear Reactions (Transmutation. Part only). 24.4 Applications & Effects of Nuclear Reactions (except for radiation dose and intensity/distance). Liz Hays . (. NASA Goddard Space Flight Center). The Origin of Cosmic Rays. Credit S. . Swordy. Victor Hess and his . “Flight . Ops . Team”, . 1912. From protons. Pion decay. Accelerated protons (p) interact with matter. Standards. Paddy Regan. Department of Physics, U. Surrey, UK . p.regan@surrey.ac.uk. &. Nuclear Metrology Department, National Physical Lab. UK, . paddy.regan@surrey.ac.uk. . Outline:. Introduction to radioisotope physics. Gamma radiation. In gamma radiation no particle is released, just a “packet” of energy.. Photon- “packet” of energy.. When an atom has too much energy, it is . excited. , it’s electrons are in higher energy levels.. Atom structure. 1. 2. 3. What is the radius of an atom?. What is the radius of a nucleus?. 1x10. -10. m. 1x10. -15. m. Atom structure. An isotope is an element with a different number of neutrons. Isotope. L-35 Nuclear structure. what’s inside the nucleus. what holds it together. isotopes. radioactivity. half-life. L-36 Nuclear energy. nuclear fission. nuclear fusion. nuclear reactors. nuclear weapons. Schedule Notes. Program web page: . https://confluence.slac.stanford.edu/x/No-cDg. Hashtag #. FermiSchool. . Let’s Begin!. Intro to the Fermi Summer School. Liz Hays. NASA GSFC. May 28, 2019. What makes gamma-ray observations distinctive?. Stephen Croft (ORNL). Acknowledgement. Attendance and preparatory work was funded by ORNL.. X-Ray Emissions. We will talk about:. Self-induced X-rays from actinides. X-ray Fluorescence induced from an external source.