In this lesson, students will investigate the nature of radioactivity and the effect of both distance and shielding materials on different radioactive sources using a Geiger-Muller tube with a counter ...

The IAEA's Marine Radioactivity Information System (MARIS) allows free access to users to search and download the results of measurements of radioactivity in seawater, biota, sediment and suspended ...

Radiation Basics Made Simple is a training module that introduces participants to the fundamentals of radiation and radioactivity. Radiation Basics Made Simple features an enhanced lecture-style ...

The nuclei of other atoms are unstable. These nuclei undergo change spontaneously, that is, without outside help. When unstable nuclei undergo change they give off radiation. Atoms which have unstable ...

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We say that it becomes ‘excited’. An electron can be excited when its absorbs energy from electromagnetic radiation. Different changes in energy level need different frequencies of ...

All types of radiation become less intense as they travel further away from the radioactive material. This is because the particles or rays become more spread out. The thicker the substance ...

In order to build a framework of macroscale thermal radiation, this chapter will give brief introductions of some fundamental theories and definitions of basic concepts of thermal radiation, such as ...