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Title:range of alpha and Beta particles in
air• Prior learning
– Properties of alpha beta gamma– Penetration power through paper,
aluminum,Lead• Key words
– Geiger muller counter, Stop clock, penetration
Topic – Physics 2aMonday 8th February
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Alpha, Beta, Gamma Radiation
• Complete practical activity safely to produce accurate data
• Design suitable table to record results and discuss findings
• Draw diagrams to and write equations to show alpha beta and gamma decay
By the end of thi lesson we should be able to:
Topic – Physics 2a
s
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Task 1: Match the symbol
•α
•ß
•γ
• High energy electron formed when a neutron changes into a proton and an electron
• 2 protons 2 neutrons 2+ charge
• Wave of EM radiation, highly penetrating
Topic – Physics 2a
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Recap Alpha deay
• Alpha decay• 2 protons 2neutrons (helium
particle)
• 238U 234Th + 4α + energy
Topic – Physics 2a
92 90 2
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Recap – Beta decay
• Beta• (ß) 14C 14N + 0 ß + V+ energy• Beta particles are electrons
originating from the NUCLEUS of a radioactive atom.
• This occurs when an excess neutron changes into a proton and an electron whilst ejecting an antineutrino particle (uncharged/massless)
Topic – Physics 2a
6 7
-1
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Recap – Gamma decay
• Gamma rays • (light/EM radiation) no mass,
uncharged• Usually released after alpha or beta
decay
•(γ) 131I 131Xe + 0 e + γ
Topic – Physics 2a
53 54 -1
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Thin mica Thinaluminiumstops beta
Thick leadreduces gamma
Skin orpaper stopsalpha
Task 2: Draw and explainTopic – Physics 2a
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Task 1: Experiment 6.2 pg 60 STAWA
• Copy background• Aim• Method (use lab notes)• Diagram of set up• Table for results• Hmk = complete post lab
discussion 1-5 in lab book
Topic – Physics 2a
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Summary Task
• Read summary 5.2• Answer 5.2 questions 3,4,5
Topic – Physics 2a
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Alpha, Beta, Gamma Radiation
• Complete practical activity safely to produce accurate data
• Design suitable table to record results and discuss findings
• Draw diagrams to and write equations to show alpha beta and gamma decay
By the end of this lesson we should be able to:
Topic – Physics 2a