Radiological Exam - Radiological Exam Quiz 18 Radiation...

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Radiological Exam Quiz 18 Radiation decay -spontaneous transformation of an unstable combination of nucleons (PARENT) to a more stable combination of nucleons (DAUGHTER) -unaffected by temperature, pressure or chemical environment -always accompanied by ionizing radiation 3 intrinsic properties that can be used to differentiate various radionuclide’s are: -type of radiation (a,B, Y) -radiation energy -rate of decay Alpha particles: -have double positive charge -are composed of two neutrons and two protons Rate of radiation decay is: -the number of atoms decay per unit time -depends on the number of atoms present -is different for each radionuclide -is characteristic of a radionuclide because radiation decay is a spontaneous and random process Quiz 19 Eben Byers event had an impact on public perception about radium because….made the public aware that radium could be dangerous and needed to be regulated Health physicists: -are a group within the physics section assigned to consider health effects of radiation exposure -consider ways to measure radiation levels and limit exposure to personnel Ingestion of large amounts of radium by the Radium Girls resulted in many of them developing
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-bone cancer The beneficial uses of radiation include -medical diagnostics -food preservation -nuclear power Quiz 20 When excitation occurs: -electrostatic attraction of the radioactive particle raises an electron to a higher level -electrons of the matter will not be lost from the atom. Instead, they are raised to a higher energy state -when electrons drop back to normal (stable state), they may emit electromagnetic radiation, such as fluorescent light. When ionization occurs: -kinetic energy is taken from the radioactive particle as it produces excitation and ionization -the velocity of radioactive particles is reduced as it loses energy -when the a-particle loses all its energy, it combines with 2 free electrons and form helium. The radiation no longer exists Bremsstrahlung: -due to electrostatic repulsion, electrons de-accelerate in the orbital. Some of this energy may be
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This note was uploaded on 11/17/2010 for the course POL 223 taught by Professor Aldrich during the Spring '10 term at Purdue University-West Lafayette.

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Radiological Exam - Radiological Exam Quiz 18 Radiation...

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