Topic Physics 2 a Monday 8 th February

Topic – Physics 2 a Monday 8 th February 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 2 a Alpha, Beta, Gamma Radiation s By the end of thi lesson we should be able to: • Complete practical activity safely to produce accurate data • Design suitable to record results and discuss findings • Draw diagrams to and write equations to show alpha beta and gamma decay

Topic – Physics 2 a Task 1: Match the symbol • α • High energy electron formed when a neutron changes into a proton and an electron • ß • 2 protons 2 neutrons 2+ charge • γ • Wave of EM radiation, highly penetrating

Topic – Physics 2 a Recap Alpha deay • Alpha decay • 2 protons 2 neutrons (helium particle) • 238 U 234 Th + 4α + energy 92 90 2

Topic – Physics 2 a Recap – Beta decay • Beta • (ß) 14 C 14 N + 0 ß + V+ energy 6 7 • Beta particles are electrons originating from the NUCLEUS of -1 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 2 a Recap – Gamma decay • Gamma rays • (light/EM radiation) no mass, uncharged • Usually released after alpha or beta decay 131 Xe + 0 e + γ • (γ) 131 I 53 54 -1

Topic – Physics 2 a Task 2: Draw and explain Thin mica Skin or paper stops alpha Thin aluminium stops beta Thick lead reduces gamma

Topic – Physics 2 a 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 2 a Summary Task • Read summary 5. 2 • Answer 5. 2 questions 3, 4, 5

Topic – Physics 2 a Alpha, Beta, Gamma Radiation By the end of this lesson we should be able to: • Complete practical activity safely to produce accurate data • Design suitable to record results and discuss findings • Draw diagrams to and write equations to show alpha beta and gamma decay