- Learning
- Nuclear Fusion Courses
- How Does Thermonuclear Fusion Work?
- Construction and Working Principle of Tokamaks
- Construction and Working Principle of Stellarator
- Inertial Confinement Fusion
- ITER — a Major Step Towards Thermonuclear Fusion
- Fusion Power Plant as a Clean Energy Source
- Basic principles
- Magnetic confinement
- Inertial and electrostatic confinement
- Summative, cross-sectional test — Light version
- Nuclear Energy Courses
- Radioisotopes as Sources of Ionizing Radiation
- Interaction of Atomic Nuclei with Particles
- Nuclear Fuel and the Nuclear Fuel Cycle
- The Principles of Operating a Nuclear Power Plant
- The First Reactor and the First Nuclear Power Plant
- The Most Used Nuclear Reactors: PWR and BWR
- Sources, Processing, and Storage of Radioactive Waste
- Nuclear Power Plant Safety
- Nuclear fuel
- Nuclear fuel and nuclear reactors
- Nuclear power industry
- Nuclear reactors
- Radioactive waste
- Radioactive waste and safety of nuclear power plants
- Nuclear power
- Summative, cross-sectional test — Light version
- Summative, cross-sectional test — PRO version
- Renewable Energy Courses
- Nuclear Fusion Courses
- NUCLEAR fusion
- Energy Space Quest
- NUCLEAR energy
- Nuclear Power Plant Interactive 3D Model
- Nuclear Power
- The Nuclear Power Industry
- Nuclear Fuel
- The Nuclear Reactors
- The Nuclear Power Plant — How it Works
- The First Reactor
- Pressurized Water Reactor (PWR)
- Boiling Water Reactor (BWR)
- Heavy Water Reactor (PHWR)
- Gas-cooled Reactor (GCR) and Advanced Gas-cooled Reactor (AGR)
- RBMK Type Reactor
- High Temperature Reactor (HTGR)
- Reactor Using Fast Neutrons (FR)
- The Future of Fission Reactors
- Thermonuclear Fusion
- ITER Tokamak Interactive 3D Model
- NPP PWR Interactive 3D Model
- NPP BWR Interactive 3D Model
- NPP Small Modular Reactors Interactive 3D Model
- Radioactive Waste
- The Safety of Nuclear Power Plants
- Renewable Energy
- WATER energy
- Hydroelectric Power Plant Interactive 3D Model
- Hydroelectric Power Plant Operating Principles
- The Physical Properties of Water
- The Origin of the Water Energy
- History of Water Energy Utilization
- Water Energy and Its Uses
- The Segner Wheel
- Dams and Reservoirs
- Types of Hydroelectric Power Plants
- Kaplan Turbine
- Francis Turbine
- Pelton Turbine
- Choosing a turbine (Turbine selection graph)
- The Highest Dams, the Highest Largest Reservoirs
- The Largest Hydroelectric Power Plants in the World
- Tidal Energy and Sea Wave Power
- Marine Current Power and Ocean Thermal Energy
- HPP Impact on the Environment
- WIND energy
- SOLAR energy
- GEOTHERMAL energy
- BIOMASS energy
- The FUTURE of Renewable Energy Sources
- WATER energy
- 3D models
- Free Downloads
- Physics mysteries
- H-mode
- Half-life
- Heat exchanger
- Heat transfer medium
- Heavy water
- Helias
- Helical coil
- Helical magnetic field
- Heliostat
- Heliotron
- Helium, He
- High Temperature Gas-cooled Reactor, HTGR
- High-Voltage Direct Current, HVDC
- Hohlraum
- Horizontal axis turbine
- Hormesis
- Hot spring
- Hydraulic head
- Hydroelectric power plant
- Hydrogen (thermonuclear) bomb
- Hydrogen, H
- Hydropower
Half-life
The time required for half of the radionuclides of a given material to decay into another element. In other words, the probability of a radioisotope decaying during its half-life is 50 percent. For example, if we take 4 grams of cobalt 60, which has a half-life of 5.26 years, after that time there will be 2 grams of cobalt 60 in the sample. After another half-life, there will be only 1 gram of cobalt 60 in the sample.
The half-life is an important parameter; e.g., in nuclear waste management, it indicates how long the material should be stored before its radioactivity drops to harmless levels. This is usually 10 half-lives.
ABOUT US
Energy encyclopedia (EE) is the project of Simopt. We have devoted ourselves to popularizing energetics in an educational and entertaining way since 1991. In the following years, we plan to continue the development of EE.
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