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Ionising radiation: types and physical properties

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Facts & Figures #83 — Edit

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1. Ionising radiation has sufficient energy to remove electrons from atoms and produce ions.
2. Alpha radiation consists of two protons and two neutrons and carries a +2 charge.
3. An alpha particle has four times the mass of a proton; it is highly ionising but has low penetrating power.
4. Alpha radiation can be stopped by air or skin.
5. Beta radiation is a high-speed, high-energy negatively charged electron emitted by a radioactive nucleus.
6. A positron is approximately the size of an electron but carries a positive charge; artificially produced positrons are used in PET.
7. Gamma radiation is high-frequency electromagnetic radiation consisting of high-energy photons emitted from the nucleus during gamma decay.
8. X-rays are electromagnetic radiation generated by circulating or decelerated electrons, including by Bremsstrahlung.
9. X-rays and gamma rays transfer energy to electrons and can produce ionisation; during this interaction their frequency is reduced.
10. The velocity of an X-ray remains unchanged despite reduction in its frequency.

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Classification Relationships — through Subtopic3

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Obstetrics and Gynaecology→ Basic→ Biophysics→ General→ Radioactivity→ Ionising radiation→ Alpha radiation

Obstetrics and Gynaecology→ Basic→ Biophysics→ General→ Radioactivity→ Ionising radiation→ Beta radiation

Obstetrics and Gynaecology→ Basic→ Biophysics→ General→ Radioactivity→ Ionising radiation→ Electromagnetic radiation

Obstetrics and Gynaecology→ Basic→ Biophysics→ General→ Radioactivity→ Ionising radiation→ Positron

Obstetrics and Gynaecology→ Basic→ Biophysics→ General→ Radioactivity→ Ionising radiation→ X-rays

Ionising radiation: types and physical properties

Facts & Figures #83 — Edit

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Classification Relationships — through Subtopic3

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