The gamma dose rate is the radiation exposure which effects man from outside. It is given as dose equivalent, measured at a certain place per hour. The gamma dose rate is generally given in Microsievert per hour (µSv/h).

Measurement of the external radiation that humans are exposed to depending on time and place.

Electromagnetic wave radiation emitted by an atomic nucleus. Gamma radiation of the same physical nature as visible light, however with considerably more energy and high penetration capacity in matter. Heavy materials such as lead or concrete must therefore be used for shielding from gamma radiation. Apart from the way it is generated, gamma radiation is comparable to X-rays.

Alternative

• Alpha radiation (alpha particles)
• Beta radiation

Radiation exposure through gamma radiation of radioactive aerosols and gases in the atmosphere.

The gantry crane spans its working area like a bridge. It runs mostly on two parallel tracks upon which it supports itself. On account of its design the gantry crane can lift great loads between its supports.

Special area of internal medicine dealing with the diseases of the gastro-intestinal tract and adjacent organs.

Geochemistry deals with the

• material composition,
• distribution,
• stability and
• circulation

of chemical elements in

• minerals,
• rocks,
• soil,
• water,
• the Earth's atmosphere and
• the biosphere.

A geophone works like a highly sensitive microphone. It converts slightest tremors of the ground into electrical signals.

Geosphere is the space where the earth's crust, water and air hull touch and penetrate each other.

1 gigabecquerel (GBq) = 1.000.000.000 becquerel (Bq).

1 gigahertz (GHz) = 1,000,000,000 hertz (Hz).

International standard for mobile communications operations. The transmission frequencies are at 900 MHz (e. g. D-network) and 1800 MHz (e. g. E-network). The data transmission rate is 9.6 kbit/s. The signal is pulsed with 217 Hz.

A measure usual in geodesics of the even angle, defined as the hundredth part of the right angle ( 1 Gon = 0,9°).

SI-measure of the energy dose, 1 Gray (Gy) = 1 joule per kilogram.

All operators of nuclear facilities are required to conduct monitoring measurements in the area around the installation. The legal basis for this is the Guideline concerning Emission and Immission Monitoring of Nuclear Installations.

This has two objectives: first, to assess exposure in humans as a result of discharges of radioactive substances in air and water and, second, to monitor compliance with maximum permitted discharges of activity as well as dose limit values.