D. Glossary
FLIR Detection
Background Radiation
The ubiquitous radiation in the environment, emitted from a variety of mostly natural and a
few man-made sources. Natural sources are terrestrial (
Ú
of
Ú
like
235
U
or
232
Th abundant in the Earth crust) or cosmic (high-energy
originating primar-
ily from the Sun interact with the upper Earth atmosphere creating a shower of secondary
radiation).
Becquerel (Bq)
The becquerel is the
Ú
derived unit of radioactivity. One Bq is de ined as the
of a
quantity of radioactive material in which one
Ú
decays per second. (
)
1 Bq =
1
s
Beta Particle
High-energy, high-speed
(
𝛽
) or
Ú
(
𝛽
) emitted as
Ú
.
The
Ú
of
Ú
Neutrons
to
Ú
emits beta particles and antineutrinos.
Also known as:
𝛽
Particle
Beta Radiation
A
of
. Beta Radiation can usually be shielded by a sheet of
metal, for example, Al foil (Figure
245
, p.
283
). Beta radiation ionizes the surface of organisms
and can lead to severe burns with long-term sequelae like skin cancer.
Also known as:
𝛽
Radiation
Bluetooth
A standardized open wireless technology for data communication over short distances using
radio waves.
Bq
Ú
(C
2
H
4
)
n
Ú
(C
5
H
8
O
2
)
n
Ú
Cadmium Zinc Telluride (CZT, CdZnTe)
An alloy of cadmium telluride and zinc telluride, a substance to build
usable at room temperature.
Calibration
A de ined procedure for the comparison of the reading of an instrument to the value conven-
tionally accepted as correct (a “standard”).
270
identiFINDER
®
R300/en/2014.4(13623)/Feb2015
