PDF-Gamma Ray Attenuation Properties of Common

Shielding Materials Daniel R McAlister PhD PG Research Foundation Inc 1955 University Lane Lisle IL 60532 USA Revision 6 1 June 18 201 8 Introduction Attenuation or s hielding of gamma r. extreme physics at play. Bruce Gendre. ARTEMIS. Description of a GRB. Gamma-ray Burst : . burst of high energy photons. Isotropic distribution on the sky. extragalactic events. . quite common (~2/day. 84 . Hiroshi Nagai. (National Astronomical Observatory of Japan). In collaboration with. Monica . Orienti. , Motoki Kino, Kenta Suzuki, Keiichi Asada, Akihiro . Doi. , Gabriele . Giovannini. , Marcello . Polarimeter. for Solar flares . (. GRIPS. ). Recently funded NASA LCAS balloon mission. 3D position-sensitive germanium spectrometer. High spectral resolution (~2 keV FWHM at 662 keV). Compton-scatter track reconstruction. David Smith. Centre d’Etudes Nucléaires de Bordeaux-Gradignan. ( CENBG - in2p3 - CNRS ). I. nstitut. de Physique Nucléaire de Lyon. 6 mars 2015. Le ciel en rayons gamma. avec le. . satellite . Fermi . Andrew Levan. University of Warwick. Burst durations. Swift 1644+57. Very long bursts are often image triggers (1000+s). Correction from Swift observed rates to astrophysical rates (at Swift limits) could be a factor 10. with matter. Interaction of x-ray photons with matter. . When a beam of x-ray photons passes through matter, its intensity (energy . –. or number of x-ray photons - flowing per second) is reduced: . Nathalie . Japkowicz. , Colin . Bellinger. , . Shiven. Sharma, Rodney Berg, Kurt . Ungar. . University of Ottawa, Northern Illinois University. Radiation Protection Bureau, Health Canada. Mysterious explosions in the Universe. Poonam Chandra. Royal Military College of Canada. Universe is 14 billion years old.. Our sun is 5 billion years.. Supernovae and Gamma ray bursts. Explosions lasting fraction of a second to few seconds.. Stack before free surface multiple removal. Multiple attenuation. Free surface multiple attenuation. Stack after free surface multiple removal. Multiple attenuation. Internal multiple attenuation results . (. GammaSIG. ). (. PhysPAG. ). 231. st. AAS. Meeting (2018). Sylvain Guiriec . –. . sguiriec@gwu.edu. Gamma-ray Science Interest Group. (. GammaSIG. ). 2018/01/08. Agenda. PhysPAG. /. GammaSIG. “The e-ASTROGAM mission (exploring the extreme Universe with gamma rays in the MeV-GeV range)”. National Centre for Radio Astrophysics. Tata Institute of Fundamental Research. Poonam Chandra. What are Gamma Ray bursts (GRBs)?. Most energetic events in the universe. Long duration GRBs (t>2s) . . Matthew Erenpreiss. Ohio Department of Natural Resources. Division of Geological Survey. Utica . Shale Play Book Study Workshop. Canonsburg, PA. July 14, 2015. Outline. Background. Spectral Gamma-Ray Scanner. Marie-Laure Mauborgne. SLB. CSG17 – July 17. th. 2023. 1. Founded by a physicist and an engineer in 1926 to conduct the first geophysical measurements of rock formations . What is SLB?. (former Schlumberger). T. elescope. Liz Hays. NASA GSFC. Lecture Plan. The Fermi Observatory. Science Motivation. Instruments. Detecting gamma rays with the Large . A. rea Telescope. Instrument Subsystems. Angular resolution.