Particle Physics

Section 1.
Q1. Name the three things that are conserved in a nuclear reaction.
Q2. Why was th neutrino proposed an who propoesed it?
Q3. Write an expression that describes the first artificial transmutation of the atom.
Q5. Draw a labelled diagram of the apparatus used by Cockroft and Walton.

Section 2.
Q1. It took many years for the neutrino tobe detected by Physicists give two reasons why.
Q2. What is pair production, give an expression for it?
Q3. What is pair annihilation, give an expression for it?
Q4. If two particles in a particle accelerator have 2.5X10-12j of energy between them how much mass could this energy make?
Q5. Give some advantages of circular particle accelerators over linear particle accelerators.

Section 3.
Q1. 234Th90 under goes alpha radiation with the release of 8.2 X 10-13j of energy. Write an expression to dsscribe this reaction. Calculate the energy of the alpha particle.
Q2. 238U92 loses an alpha particle and releases 9 X 10-12j of kinetic energy. Write an epression to describe this reaction. Calculate the energy of the larger nucleus after the reaction.
Q3. Why was the neutrino proposed? Who proposed it and why did it take so long to find it?
Q4. Two prtons are accelerated with energy of 6GeV between them. What is the largest mass that can be produced from this energy?
Q5. The mass of a pion is 2.4X10-28Kg. If two protons are accelerated in a cyclotrone so as they have 5GeV each, how many pions could be produced after the proptons collide?

Section 4.

Name the four fundamental forces of nature.
Write the forces in order from strongest to weakest.
What does each of the forces yu have named work on?
Discuss the forces with regard to the range over which they work.

Section 5.
Q1. Define the term Lepton and give some examples.
Q2. Name the six quarks and give their charge.
Q3. Give the quark compositon of mesons and Baryons.
Q4. Give two examples of Mesons and Baryons.
Q5. Give the quark compositon of a proton and a nuetron.