1. Background Radiation
1.1. 25,1% man made
1.2. Sources
1.2.1. Food and drink
1.2.2. Medical
1.2.3. Rocks/building material
1.2.4. Cosmic rays
1.2.5. Radioactive radon gas from rocks
1.2.5.1. Risks of getting lung cancer
1.2.6. Air travel
1.2.7. Nuclear weapons
1.2.8. Occupational
1.2.9. Waste from nuclear power
2. Types Of Nuclear Radiation
2.1. Alpha
2.1.1. Massive + highly charged
2.1.2. Stopped by thin paper
2.1.3. From Helium nucleus
2.1.4. Loses energy rapidly
2.1.5. Causes ionization
2.2. Gamma
2.2.1. Electromagnetic wave
2.2.2. No mass + No charge
2.2.3. Weakly interacts with matter
2.2.4. Stopped by dense metal
2.3. Beta
2.3.1. 8000x less massive/ Alpha + half charge
2.3.2. Fast moving electron
2.3.3. Loses energy more gradually
2.3.4. Stopped by thin aluminium
3. N/Z curve
3.1. Strong nuclear force
3.1.1. Nuclei attraction
3.1.2. Electrostatic force
3.1.2.1. Decreasing electrostatic repulsion
3.2. Beta + decay
3.2.1. proton turns into a neutron
3.2.2. - electrostatic force
3.2.3. Positron emitted
3.3. Beta - decay
3.3.1. neutron turns into a proton
3.3.2. + electrostatic force
3.3.3. Electron emitted
3.4. Alpha decay
3.4.1. Helium core emitted
3.4.2. Atomic + mass number changed
3.4.3. For Z number superior to 80 mass number
3.5. N/Z curve
3.5.1. line of stabiliy
3.5.1.1. Until istotopes where Z superior to 80
3.6. Isotopes
3.6.1. Same mass number
3.6.2. Not same atomic number
4. Is radiation dangerous?
4.1. Contamination
4.1.1. Direct contact
4.1.2. Spread by moving away
4.2. Irradiation
4.2.1. Undirect contact
4.2.2. reduce by moving away
4.3. Precautions
4.3.1. protective clothing
4.3.2. Tongs
4.3.3. Short exposure time
4.3.4. Appropriate storage
4.3.4.1. Shielded
4.4. Type of radiations
4.4.1. Alpha particules
4.4.1.1. Penetrate human skin
4.4.1.2. Heavy
4.4.1.3. Highly charged
4.4.2. Beta particules
4.4.2.1. Penetrate human skin
4.4.2.1.1. Radiation burns
4.4.2.2. Charged
4.4.3. Gamma rays
4.4.3.1. Penetrate human body
4.4.3.1.1. Organs damages
4.4.3.2. Uncharged