Antiparticles and Pair Production 0.0 / 5 ? PhysicsParticle physicsASAQA Created by: tahliaDCreated on: 13-10-15 13:10 What is the antiparticle of an electron? Positron 1 of 28 What is rest energy? The energy of a resting/immobile particle 2 of 28 What is rest energy measured in? Mev 3 of 28 True or False- Energy can be turned into mass True 4 of 28 True or Flase- Mass can be turned into energy True 5 of 28 What is the basic definition of Pair Production? When energy is converted into mass 6 of 28 What two types of matter are produced during Pair Production? Matter and Antimatter 7 of 28 How much of each is created? Equal amounts 8 of 28 How much energy needs to be present for Pair Production to take place? Enough to produce the mass of the matter 9 of 28 Why must a particle's antiparticle also be produced during pair production? Certain quantities must be conserved 10 of 28 Why do proton collisions require a lot of energy? Protons repel eachother so a lot of energy is required to overcome this elecromagnetic force 11 of 28 Why do proton collisions produce a lot of energy? The energy supplied in order for the collision to occur is released upon impact 12 of 28 What type of energy is required in proton collisions? Kinetic energy 13 of 28 Define 'Photon' Packets of EM waves 14 of 28 What do photons produce during Pair production? an electron-positron pair 15 of 28 When do electron-positron pair usually occur? When a photon passes near a nucleus 16 of 28 Particles produced in a detector curve do what and why? Curve away from eachother in opposite direction because they are in an applied magnetic field with opposite charges 17 of 28 What is the minimum energy required for pair production? The sum rest energy of the particles involved 18 of 28 Define rest energy The total amount of energy that would be produced if a particle's mass is converted into energy 19 of 28 What does pair production always produce? A particle-antiparticle pair 20 of 28 What is the symbol for the rest energy of a particle/antiparticle? Eo 21 of 28 What is the rest energy of a particle-antiparticle pair? 2Eo 22 of 28 Give the equation for finding the minimum energy required for pair production? Emin=2Eo 23 of 28 What is Emin measured in? Mev 24 of 28 What is Eo measured in? Mev 25 of 28 What is the only type of photon which has enough energy to produce an electron-positron pair? A gamma ray photon 26 of 28 Why is an electron-positron pair the most common pair produced? They have a low mass, meaning that they have a low rest energy so less energy is needed for pair production to happen 27 of 28 How do you convert Mev in J? Times the Mev 1*10^6 to get ev then multiply this by 1.6*10^-19 28 of 28
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