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 . Oscillating . electric and magnetic fields. propagate through space. Virtually . all energy exchange between the Earth and the rest of the Universe. is by electromagnetic radiation. Most of . what we perceive as temperature. Particle Detectors. … is a device used to . detect, . track, and/or . identify high-energy particles [e.g., those produced by nuclear decay, cosmic radiation, or reactions in a particle accelerator]. . 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 . 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 . Radioactivity: The characteristic of various materials to emit ionizing radiation. Ionization: The removal of electrons from an atom. The essential characteristic of high energy radiations when interacting with matter.. as in international and national standards The general meaning is unambiguous but a value depends on a number of conditions and the purpose Hence a clear on a numerical value of the energy threshold :. 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. Jack . micallef. roadmap. RADIATION IN MEDICINE. INDUSTRIAL USES. SCIENTIFIC APPLICATIONS. DANGERS OF RADIATION. INTERESTING CASES. RADIATION USES IN MEDICINE. X-Rays. X Ray machines produce photons that are able to pass through objects made of light elements. 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. AASIF MAJEED LONE . ASSISTANT PROFESSOR. CENTURION UNIVERSIT. Y. Dosimetry. Radiation Dosimetry is a study in physics which deals with the measurement of radiation which may include Exposure, Absorbed dose etc., . 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 . “. Radiation.  is a process in which energetic particles or energetic waves travel through vacuum or media. .. Radiobiology.  (also known as radiation biology) is the study of the action of ionizing radiation on living things.. Physics Behind PHITS Simulation. 2. Radiation & Radioactivity. Ability to generate radiation due to decay of nucleus. *to be explained later. Example. : Spent nuclear fuel. Plume containing . Radiation dosimetry . is the quantitative description of the effect of radiation on living tissue. . . . The absorbed dose . of radiation is the energy delivered to the tissue per unit mass. . . Used of Absorbed dose.