Radiation презентация
Содержание
- 2. Definition of Radiation “Radiation is an energy in the form of
- 3. Forces: There are many interactions among nuclei. It turns out that
- 5. Basic Model of a Neutral Atom. Electrons (-) orbiting nucleus of
- 7. Radioactivity If a nucleus is unstable for any reason, it will
- 15. The electro-magnetic waves vary in their length and frequency along a
- 19. Types of Radiation Radiation is classified into: Ionizing radiation Non-ionizing radiation
- 21. Ionizing Radiation Definition: “ It is a type of
- 22. Another Definition
- 25. Alpha Particles (or Alpha Radiation): Helium nucleus (2 neutrons and 2
- 27. Beta Particles: High speed electron ejected from nucleus; -1 charge, light
- 31. X- and Gamma Rays: X-rays are photons (Electromagnetic radiations) emitted from
- 35. QUANTIFICATION OF RADIATION A. Quantifying Radioactive Decay B. Quantifying Exposure
- 36. A. Quantifying Radioactive Decay Measurement of Activity in disintegrations per second
- 37. B. Quantifying Exposure and Dose Exposure: Roentgen 1 Roentgen (R) =
- 40. Exposure Limits OSHA Limits: Whole body limit = 1.25 rem/qtr or
- 43. Community Emergency Radiation Hazardous Waste Sites: Radiation above background (0.01-0.02
- 45. HEALTH EFFECTS Generalizations: Biological effects are due to the ionization
- 47. Delayed Somatic Effects: Delayed effects to exposed person include: Cancer, leukemia,
- 48. Critical Organs: Organs generally most susceptible to radiation damage include: Lymphocytes,
- 49. Non-ionizing Radiation Definition: “ They are electromagnetic waves incapable of producing
- 50. All earth surface system components emit radiation---the sun and the earth
- 55. Other Manmade Sources of Non-Ionizing Radiation
- 58. Effects Radiofrequency Ranges (10 kHz to 300 GHz) Effects
- 59. RADIATION CONTROLS A. Basic Control Methods for External Radiation Decrease
- 60. Time: Minimize time of exposure to minimize total dose. Rotate employees
- 62. B. Monitoring Personal Dosimeters: Normally they do not prevent exposures
- 66. Direct Reading Survey Meters and Counters: Useful in identifying source of
- 68. Continuous Monitors: Continuous direct reading ionization detectors (same detectors as above)
- 69. Elements of Radiation Protection Program Monitoring of exposures: Personal, area,
- 70. Thank You
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