 |
|||
|
|
|||
|
|
|||
| ||||||||||
|
|  DOE-HDBK-1130-98
Module 1: Radiological Fundamentals
Instructor's Notes
Table 1-2
Alpha Particles
Large mass (2 protons, 2 neutrons, 0
electrons).
Physical
+2 charge.
Characteristics
Very short (about 1-2 inches in air).
Range
Deposits large amount of energy in a short
distance of travel.
Few centimeters of air.
Shielding
Sheet of paper.
Dead layer of skin (outer layer).
No external hazard (dead layer of skin will
stop alpha particles).
Hazards
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.
Sources
2.
Beta particles
a.
Physical characteristics
1)
The beta particle has a small mass and is
EO6 Identify the four basic
positively or negatively charged. Positively
types of ionizing radiation
charged beta particles are called positrons and
and the following for each
have an electrical charge of plus one. Negatively
type:
charged beta particles are high-energy electrons
a. Physical characteristics
and have an electrical charge of minus one.
b. Range
c. Shielding
2)
A negatively charged beta particle is physically
d. Biological hazards
identical to an electron.
e. Sources
3)
The beta particle ionizes target atoms due to the
force between itself and the electrons of the
atom. Both have a charge of minus one.
b.
Range
1)
Because of its charge, the beta particle has a
limited penetrating ability.
10
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals