Radioactivity
Chapter Name : Nuclei |
Sub Topic Code : 101_12_13_06_05 |
Topic Name : Radioactivity |
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Sub Topic Name : Gamma Decay |
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Introduction
Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability. Because the nucleus experiences the intense conflict between the two strongest forces in nature, it should not be surprising that there are many nuclear isotopes which are unstable and emit some kind of radiation.
Pre-Requisites:
Radioactivity
Activity:
Isotopes.
Real Life Question:
What is gamma decay?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Gamma radiation | Gamma radiation, also known as gamma rays, and denoted by the Greek letter ?, refers to electromagnetic radiation of high frequency and therefore high energy per photon. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Nuclear transmutation | Atoms of one element can be changed into atoms of other element by 'transmutation'. |
Real life uses :
Carbon dating.
Places to visit :
Physics laboratory.
Practical examples around us
| Examples | Explainations |
|---|---|
| Radionuclide | A radionuclide is an atom with an unstable nucleus, characterized by excess energy available to be imparted either to a newly created radiation particle within the nucleus or via internal conversion. |
What you learn in Theory:
Gamma radiation, also known as gamma rays, and denoted by the Greek letter ?, refers to electromagnetic radiation of high frequency and therefore high energy per photon.
What you learn in Practice:
Natural sources of gamma rays on Earth include gamma decay from naturally occurring radioisotopes, and secondary radiation from atmospheric interactions with cosmic ray particles.