emission of energy through space. - Can move as electromagnetic waves or subatomic particles (Wave-Particle Duality).

- Can be intercepted or absorbed by Matter - MATTER that INTERCEPTS RADIATION is said to be EXPOSED or IRRADIATED

a type of radiation that does not remove electron from atoms

a type of radiation that removes electrons from atoms and molecules

Radio waves, Microwaves, Infrared Radiation, Visible light are type of what radiation?

Alpha Radiation, Beta Radiation, X-rays, Gamma rays are types of what radiation?

* Results in an annual radiation dose of approximately 3 millisieverts. * Human evolution has been influenced by this

Natural Environment Radiation composes of what fours?

* Originates in outer space through heavenly bodies such as the sun and stars. * Source of natural background radiation. * Composed of particulate and electromagnetic radiations.

The intensity of cosmic radiation on Earth increases with what?

source of ionizing radiation that * Results from deposits of Uranium, Thorium, and other radionuclides in the Earth. * Can be found all throughout nature such as in the soil, water, and vegetation.

The intensity of terrestrial radiation is highly dependent on the what of the area

source of ionizing radiation that is * Found inside the human body through the water we drink or the food we eat * Have always been with us and contribute an equal dose to humans

2 examples of internally deposited radionuclides

the radioactive gas produced by uranium

* The largest source of natural environmental radiation. * Alpha emitter. * Contributes to radiation dose only to the lungs. * Can be found in all Earth-based material such as concrete, bricks, and gypsum wallboards.

has been influenced by natural environmental radiation

sources of ionizing radiation that * Results in an annual dose of 3.2 millisiverts. * Artificial. * Used in many ways such as medical procedures, consumer items, and nuclear energy.

largest man-made source of ionizing radiation (3.2 mSv/vr).

source of ionizing radiation that is the following: * Diagnostic X-rays - largest man-made source of ionizing radiation (3.2 mSv/vr). * Computed Tomography * Fluoroscopy * PET Imaging (Fluorine-18) * Nuclear Medicine Imaging (lodine-131, Tc 99m, Co-60, etc.)

sources of ionizing radiation that are * Radium Watch Dials (Radium and
Tritium) * Smoking Tobacco * Road Construction Materials (Radon) * Electron Tubes * Exit Signs * Smoke Detectors * Camping Lantern Mantles (Thorium) * Airport X-ray Systems

sources of ionizing radiation that are this * Nuclear Power Plants * Bataan Nuclear Power Plant * Chernobyl * Fukushima * Three Mile Island

2 Groups exposed to man-made radiation

type of group exposed to radiation * Any individual not working directly with radiation (civilians). * Exposed to consumer products, radiation from nuclear fuel cycle, residual fallout from nuclear weapons and accidents.

Groups exposed to radiation that are * Individuals working directly with radiation (Rad Techs, Flight Attendants, Nuclear Reactor Workers). * Exposed to working environment such as in radiology and are monitored for radiation exposure with dosimeters.

2 Types of Ionizing Radiation

type of ionizing radiation that * Includes charged particles that have enough energy to remove electrons or ionize molecules. * Can cause multiple ionization events.

Type of ionizing radiation that * Includes uncharged particles such as photons or neutrons. * Occurs from an ionization that sets free a single electron with insufficient energy to produce multiple ionization events.

2 Basic Types of Radiation

Basic type of radiation that has * Charged subatomic particles (alpha and beta radiation). * Subatomic particles carry energy and have mass.

* Primarily produced during radioactivity of an unstable atom. * Must be in motion and possess sufficient kinetic energy to cause ionization.

Type of Particulate Radiation that is * Equivalent to a Helium nucleus (Consists of 2 protons and 2 neutrons). * Atomic mass is approximately 4 amu. * Large and exerts great electrostatic force. * Emitted only from heavy elements

Type of Particulate Radiation that has an * Average kinetic energy = 4-7 MeV * ionizes approximately 40,000 atoms for every centimeter of travel through the air * Energy is lost quickly because of the amount of ionization. * Travels 5 cm in air; 100 um in soft tissue.

Type of Particulate Radiation that is * Safe if intercepted outside of the body (intercepted by layers of the skin); Intense when intercepted inside the body (Inhaled Radon gas irradiate the lungs).

Type of Particulate radiation that * Differ in terms of mass and charge. * Carry a negative charge but differ from electrons by its origin (nucleus). * Range is longer; 10-100 cm in air and 1-2 cm in soft tissue.

Basic Type of Radiation that is * A type of radiation that has both non-ionizing and ionizing capabilities. * Exists over a wide energy range called a an energy continuum. * Has no mass, but has electrical and magnetic energy changing in a sinusoidal fashion. * Travels in the form of photons, which is its smallest quantity.

* Its properties include: Frequency, Wavelength, Velocity, and Amplitude. * Travel at the SPEED OF LIGHT * 3 x 10^8 m/s or 300,000 km/s or……..186,000 miles/s

was coined by James Clerk Maxwell who showed that visible light has both electric and magnetic properties