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Radiation Physics I

Introduction

QuestionAnswer
What Fundamental units of measurement do we use? inchces, pounds, seconds
Definition of Work? applying a force over a distance
Definition of Momentum? product of mass of an object x velocity (speed)
Definition of Force? push or pull exerted on object
Definition of Velocity? speed
Definition of Power? rate of doing work
Name the forms of energy. Chemical, electrical, kinetic, potential, thermal
What is chemical energy? release by chemical reaction
What is electrical energy? movement of e- (current)
What is kinetic energy? energy in motion
What is potential energy? energy at rest
What is thermal energy? from heat
State the unit of measurements of temperature? F , C, Kelvin
Definition of x-ray ionizing electromagnetic radiation
Definition of gamma naturally occurring, comes from within the nucleus
Definition of alpha heavy, absorbs by a piece of paper
Definition of beta high speed e-, that will penetrate up to 5cm of skin
Definition of valence determines chemical binding ability of atom
What are types of chemical bonding and definition 1.) covalent bond = sharing of a e- 2.) ionic bond = attraction between 2 ions
Definition of electromagnetic energy and examples oscillating electric and magnetic fields that travel in a vacuum with the velocity of light. EXAMPLES = x-ray, gamma
Definition of matter and examples anything that occupies space and has matter.EXAMPLES = solid, liquid, gas
Definition of analysis collect data
Definition of synthesis combination of components to form a connected whole
Definition of scientific law proven idea
Definition of element substance that CAN'T be broken down any further without changing its chemical properties
Definition of atom smallest particle that has all the properties of an element
Definition of compound amount of a molecule
Definition of ionization when an atom has too many or too few electrons
Definition of octet if an element has exactly 8 e- in outer most shell, it is considered stable
What is atomic #? # of protons in the nucleus (Z#)
What is atomic mass? # of protons and neutrons in the nucleus (A#)
Definition of a nucleon proton and neutron in the nucleus
Definition of isotope same atomic # (Z#), but different atomic mass (A#)
What is the horizontal and vertical portion of the periodic table called? * vertical= family (group 1-8)* horizontal = period
What is the family on the periodic table? same chemical properties
What is the period on the periodic table? same # of electron shells, but different chemical properties
What is LET? linear energy transfer = measure of the rate of which energy is transferred ionizing radiation to soft tissue
What is curie (bq)? * curie = conventional unit of measurement of radioactivity* bq = standard unit of measurement of radioactivity
What is physical half-life? amount of time it takes for radioactive source to reduce to ½ of initial intensity
What is biological half-life? amount of time of radioactive source in the BODY to reduce by ½ of initial intensity
State the Laws of Conservation of Energy & Matter matter can neither be created nor destroyed, but changed from one form to another
State the formula to compute # of e- permitted per shell 2n(2)
What are the 4 causes of ionization? 1.) Exposure of matter to x-ray or gamma (happens in pt body)2.) Exposure of matter to stream of e- (happens in tube)3.) Exposure of certain elements to light (in IRD & film screen crystals)4.) Spontaneous breakdown of a radioactive element
What is Physics? study of matter and energy and interactions of energy and matter
What is Chemistry? study of interactions of matter
How many sV per rem? 1 sV = 100 rem
How many R per gy? 100 R = 1 gy
What is the Conventional unit of measurement? rem, rad, R
What is the Standard international unit of measurement? gy, sV, C
Newton’s Law of Motion Inertia = property of matter that acts to resist a change in its state of motion * Force = mass x acceleration (push or pull) * for every action there is an equal and opposite reaction
Created by: sr4095 on 2009-02-01



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