1. Types of radiations

2. Alpha radiations Alpha radiations consist of: -two neutrons
-two protons

3. Alpha radiations is changing the original atom to one of an element with an atomic number 2 less and atomic weight 4 less than the original atom.

4. Example of alpha decay

5. Beta radiations
Beta radiations take the form of:
-electron
-positron

6. The positron has a particle with the size and mass of an electron, but with a positive charge, emitted from an atom.

7. Example of beta decay

8. Gamma radiations
Gamma radiations do not consist of any particles. It is a photon of energy being emitted from an unstable nucleus.

9. Example of gamma decay

10. X-ray radiations
X-ray radiations are very similar to the gamma radiations with the difference being that they come from the electron cloud.

11. Neutron radiations
Neutron radiations consist of a free neutron

12. Differences between alpha, beta and gamma radiations

13. Alpha radiations are the easiest to stop just with a thin layer of paper.
Beta radiations can travel a few meters in the air due to the small mass. It can be stopped by a thick piece of wood or a stack of paper.
Gamma waves can be stopped by a thick or dense enough layer material , with high atomic number materials such as lead or depleted uranium being the most effective form of shielding

14. Stopped by
Alpha radiation
Beta radiation
Gamma radiation
Paper √ X
Wood
Plastic
Aluminium
Lead
Thick lead
Depleted uranium

16. Deflection in an magnetic/electric field
Alpha radiation is attracted by the negative pole
Beta radiation is attracted by the positive pole
Gamma radiation is not attracted by any pole

17. Sources

18. Thanks for your attention
A presentation by Razvan, Jannes, Angelica, Svetlozar

19. This project has been funded with support from the European Commission
This project has been funded with support from the European Commission. This publication [communication] reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.