PPT-Energy and Radiation

ATS 150 Lecture 3 Defining Energy is Hard Energy is the capacity to perform work but physicists have a special definition for work too Part of the trouble is that scientists have . . Emission and Absorption . Take away concepts. Conservation of energy. . Black body radiation principle. Emission wavelength and temperature (Wien’s Law). . Radiation vs. distance relation . Black body energy flux (Stefan-Boltzmann Law) . Quantities. and . units. in radiation dosimetry. Marco SILARI, . CERN. 1. th. Annual ARDENT Workshop, Vienna, 20-23 November 2012. 1895. D. iscovery . of X rays. Wilhelm . C. . Röntgen. . . 1897 . Transfer of Energy as Heat. Energy moves as heat in three ways. Heat is always a transfer of energy from objects at a higher temperature to a lower temperature. There are 3 different ways this transfer of energy can happen. Alan martin, . sam. . harison. ,. karen. beach and peter . cole. Radiation detection and . measurement . 7.1 GENERAL PRINCIPLES . The . fact that the human body is unable to sense ionizing radiation . Dr. Matthew C. Carroll. Texas A & M University at Galveston. 2011 Thermal and Fluids Analysis Workshop. Passive Thermal Session #1. Newport News, Virginia, August 2011. What are we doing?. The Big Picture. All matter is composed of combinations of elements.. There are 115 elements that have been discovered so far, but only 92 elements that occur in nature.. The smallest . “. piece. ”. of an element that retains it characteristics is an atom.. Radiation Backgrounds for Future High Energy Electron Positron Colliders Hongbo Zhu (IHEP, Beijing) On behalf of the CEPC Study Group Workshop on the Circular Electron Positron Collider – EU edition, 24 – 26 May, Rome What type of radiation is most harmful It depends on whether your exposure to radiation is internal or external beta particles Radioactive materials thatRadiation can affect the bodyThese adverse hea 0720112-1CHAPTER 2FUNDAMENTAL RADIATION CONCEPTSPAGEI What is Radiation2-2IIThe Radioactive Atom2-2IIIRadioactive Decay Modes2-4ABeta Decay2-4BPositron Decay2-4CAlpha Decay2-5CElectron Capture2-5ENucl 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. :. Gas . Detectors for . Microdosimetry. A.J. . Waker. , UOIT. . One of the oldest and most widely used radiation detector types. Gas-filled detectors respond to the direct ionization created by charged particles set in motion by the interaction of the radiation field with the chamber gas. Nuclear. . radiation: . Arises from hundreds of different kinds of unstable atoms, created in nuclear reactions. .. Ionizing radiation: . Emitted as unstable items. , . which can damage living tissue. •. Radiation biology . is the study of the action of ionizing radiation on living organisms . •The action is very complex, involving physics, chemistry, and biology . –Different types of ionizing radiation . Defining Energy is Hard!. “. Energy. is the capacity to perform . work. ”. (but physicists have a special definition for . “. work,. ”. too!). Part of the trouble is that scientists have . “.