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

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

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

Recap Alpha deay

• Alpha decay• 2 protons 2neutrons (helium

particle)

• 238U 234Th + 4α + energy

Topic – Physics 2a

92 90 2

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

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

Thin mica Thinaluminiumstops beta

Thick leadreduces gamma

Skin orpaper stopsalpha

Task 2: Draw and explainTopic – Physics 2a

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

Summary Task

• Read summary 5.2• Answer 5.2 questions 3,4,5

Topic – Physics 2a

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