particle interactions

Question 1

beta minus decay

Answer 1

neutron = proton+electron+antineutrino using w- boson

Question 2

beta plus decay

Answer 2

proton= neutron+positron+neutrino using w+ boson

Question 3

electron capture

Answer 3

proton+electron=neutron+neutrino using w+ boson (both at same time so diagram has flat boson line)

Question 4

electron proton collisions

Answer 4

proton+electron=neutron+neutrino using w- boson going in opposite direction to normal and boson line is flat

Question 5

name gauge boson and particles affected by the strong force

Answer 5

gauge boson: pions and affects hadrons

Question 6

name gauge boson and particles affected by the electromagnetic force

Answer 6

gauge boson: virtual photon and affects charged particles

Question 7

name gauge boson and particles affected by the weak interaction

Answer 7

w+ and w- bosons and affects all types of particles

Question 8

how do fluorescent tubes work?

Answer 8

• beam of electrons flows through tube
• these electrons collide with mercury atoms
• the electrons gain energy become excited then return to ground state
• uv photons are released
• these photons are absorbed by electrons in the phosphorus coating
• the electrons become excited and then return to a lower energy level and emit visible light

Question 9

when is strangeness conserved?

Answer 9

in strong interactions

Question 10

how is the type of quark changed?

Answer 10

weak interaction

Question 11

when are strange particles created?

Answer 11

• via the strong nuclear interaction

- they are created in pairs because strangeness is conserved in strong interaction ( particle and antiparticle)