Term
Alpha Particles
Consist of?
Shielding?
Come from?
Clinical use? |
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Definition
▪ 2 protons, 2 neutrons
▪ air
▪ decay of large nuclei (>83)
▪ rarely (most damaging radiation)
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Term
Beta Particles
Consist of?
Shielding?
Clinical use? |
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Definition
▪ high energy electrons
▪ aluminum metal
▪ penetrate tissue to several mm, therapeutic
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Term
Positrons
Consist of?
Shielding? |
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Definition
▪ high energy antimatter
▪ not issue b/c interact with e- in air
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Term
Gamma rays
Shielding?
Clinical Use? |
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Definition
▪ Lead
▪ more energetic than x rays b/c shorter wavelength, pass through most materials
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Term
K Capture
Mechanism?
When does it occur?
Energy release? |
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Definition
▪ capture electron to convert proton to neutron (Z goes down)
▪ occurs in proton dense nuclei
▪ gamma ray
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Term
Positron Emission
Mechanism?
Occurs in?
Eventually yields? |
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Definition
▪ ejection of B+ to convert proton to neutron
▪ proton rich nuclei
▪ gamma rays through B+ annihilation and 1 less e-
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Term
Beta Decay
Mechanism?
Occurs in?
Energy release? |
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Definition
▪ neutron kicks out B- to become proton
▪ neutron rich nuclei
▪ gamma ray
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Term
Gamma Emission
Also known as?
Mechanism?
Energy release? |
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Definition
▪ isomeric transition
▪ element goes from metastable higher energy state to lower energy state
▪ gamma ray (straight emission, not result of something else)
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