Page 20 - KFSHRC-RSO-Course
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3.1. Radioactive Decay Law and Decay Constant ........................................ 12
3.2. Activity ............................................................................................ 12
3.2.1 Definition ................................................................................... 12
3.2.2 Quantities and units ..................................................................... 13
3.3. Half-life............................................................................................ 14
SELF-CHECK 3 ............................................................................................ 15
3.4 Calculating Activity ........................................................................... 16
SELF-CHECK 4 ............................................................................................ 18
3.6 Specific Activity................................................................................ 19
SELF-CHECK 5 ............................................................................................ 21
SELF-CHECK 6 ............................................................................................ 22
4. IONIZING RADIATION FROM OTHER SOURCES............................... 22
5.1 Ionizing Radiation from Naturally Occurring Sources............................ 22
5.1.1 Cosmic radiation ......................................................................... 23
5.1.2 Terrestrial radiation ..................................................................... 23
5.1.3 Radioactivity in our food and drink ............................................... 23
5.2 Ionizing Radiation from Artificial Sources ........................................... 24
5.2.1 From X-ray Generators ................................................................ 24
5.2.2 Ionizing Radiation from Artificial Radionuclides ............................ 24
5.2.2.1 Fission........................................................................... 25
5.2.2.2 Neutron activation .......................................................... 25
5.2.2.3 Ion bombardment............................................................ 25
5.2.3 Ionizing Radiation from Neutron Sources ...................................... 25
SELF-CHECK 7 ............................................................................................ 26
KEY POINTS ................................................................................................ 26
King Faisal Specialist Hospital and Research Centre – Biomedical Physics Department Page ii
3.2. Activity ............................................................................................ 12
3.2.1 Definition ................................................................................... 12
3.2.2 Quantities and units ..................................................................... 13
3.3. Half-life............................................................................................ 14
SELF-CHECK 3 ............................................................................................ 15
3.4 Calculating Activity ........................................................................... 16
SELF-CHECK 4 ............................................................................................ 18
3.6 Specific Activity................................................................................ 19
SELF-CHECK 5 ............................................................................................ 21
SELF-CHECK 6 ............................................................................................ 22
4. IONIZING RADIATION FROM OTHER SOURCES............................... 22
5.1 Ionizing Radiation from Naturally Occurring Sources............................ 22
5.1.1 Cosmic radiation ......................................................................... 23
5.1.2 Terrestrial radiation ..................................................................... 23
5.1.3 Radioactivity in our food and drink ............................................... 23
5.2 Ionizing Radiation from Artificial Sources ........................................... 24
5.2.1 From X-ray Generators ................................................................ 24
5.2.2 Ionizing Radiation from Artificial Radionuclides ............................ 24
5.2.2.1 Fission........................................................................... 25
5.2.2.2 Neutron activation .......................................................... 25
5.2.2.3 Ion bombardment............................................................ 25
5.2.3 Ionizing Radiation from Neutron Sources ...................................... 25
SELF-CHECK 7 ............................................................................................ 26
KEY POINTS ................................................................................................ 26
King Faisal Specialist Hospital and Research Centre – Biomedical Physics Department Page ii
