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Radiation
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Definition of Radiation

Definition of Radiation

Radiation is an energy in the form of electro-magnetic waves or particulate matter, traveling in the air.

Slide 2

Forces: There are many interactions among nuclei. It turns out that there are forces other than the electromagnetic force and the gravitational force which govern the interactions among nuclei.

Forces: There are many interactions among nuclei. It turns out that there are forces other than the electromagnetic force and the gravitational force which govern the interactions among nuclei.

Einstein in 1905m showed 2 more laws: energy/mass, and binding energy

Slide 3

Radioactivity: Elements & Atoms

Radioactivity: Elements & Atoms

Atoms are composed of smaller particles referred to as:

Protons

Neutrons

Electrons

Slide 4

Basic Model of a Neutral Atom.

Basic Model of a Neutral Atom.

Electrons (-) orbiting nucleus of protons (+) and neutrons. Same number of electrons as protons; net charge = 0.

Atomic number (number of protons) determines element.

Mass number (protons + neutrons)

Slide 5

Radioactivity: Elements & Atoms

Slide 6

Radioactivity

Radioactivity

If a nucleus is unstable for any reason, it will emit and absorb particles. There are many types of radiation and they are all pertinent to everyday life and health as well as nuclear physical applications.

Slide 7

Ionization

Ionization

Ionizing radiation is produced by unstable atoms. Unstable atoms differ from stable atoms because they have an excess of energy or mass or both.

Unstable atoms are said to be radioactive. In order to reach stability, these atoms give off, or emit, the excess energy or mass. These emissions are called radiation.

Slide 8

Ionization

Slide 9

Ionization

Slide 10

Ionization

Slide 11

Ionization

Slide 12

Types or Products of Ionizing Radiation

Types or Products of Ionizing Radiation

or X-ray

neutron

Slide 13

Radioactive Atom

Radioactive Atom

X-ray

gamma ray

Slide 14

The electro-magnetic waves vary in their length and frequency along a very wide spectrum.

The electro-magnetic waves vary in their length and frequency along a very wide spectrum.

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