PPT-EXPLAIN: 1. Energy and 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 . The US Environmental Protection Agency EPA is responsible for advising the government on radiation hazards and regulating certain sources of radioactivity in the environment This booklet provides basic facts about radiation science as well as inform 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]. . Biology. Rad T 290. Objectives – Radiation Biology. Radiosensitivity. Somatic Effects. Embryonic and Fetal Risks. Genetic Effects. Patient Interactions. **Photoelectric**. Classic Coherent Scatter. 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 . 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.. How is sunlight measured?. What types of radiation are more energetic than others?. What is the link between sun exposure and skin cancer?. How does Earth’s atmosphere naturally protect us from the Sun?. transmitted. absorbed. reflected. 1. transmission. Radiation passes through atmosphere unimpeded.. Shortwave and longwave “windows” . 2. absorption. Energy is transferred to absorber; absorber emits energy. 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. Radiation refers to the process that is concerned with the passage of energy between places through space. . It is the radiation generated by sun that . regulates the temperature of earth. . . CLASSIFICATION OF RADIATION: ionizing or non-ionizing types. . 4 - 1 CHAPTER 4 RADIATION DETECTORS AND SURVEY INSTRUMENTS: THEORY OF OPERATION AND LABORATORY APPLICATIONS PAGE I. Portable Survey Instruments ................................ ....................... . Radiation is the emission of energy in the form of waves or particles. Radiation that is so powerful that it can remove electrons from atoms is called ionizing.. Examples of types of ionizing radiation are x-rays from medical machines and gamma rays from radioactive substances. . •. 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 .