Module 1: Radiological Fundamentals
Large mass (2 protons, 2 neutrons, 0
Very short (about 1-2 inches in air).
Deposits large amount of energy in a short
distance of travel.
Few centimeters of air.
Sheet of paper.
Dead layer of skin (outer layer).
No external hazard (dead layer of skin
will stop alpha particles).
Internally, the source of alpha radiation is
in close contact with body tissue. It can
deposit large amounts of energy in a small
amount of body tissue.
Insert facility-specific information.
1) The beta particle has a small mass and is positively or
negatively charged. Positively charged beta particles are
called positrons and have an electrical charge of plus one.
Negatively charged beta particles are high-energy electrons and
have an electrical charge of minus one.
2) A negatively charged beta particle is physically identical to an
EO6 Identify the four basic
types of ionizing radiation
and the following for each
a. Physical characteristics
d. Biological hazards