Particles Flashcards
What is an isotope?
Atoms with the same number of protons, but a different number of neutrons
At what range does the SNF have no effect?
> 3fm
At what range does the SNF change from being attractive to repulsive?
0.5fm
What happens in pair production?
A photon with enough energy converts its energy into a particle and its corresponding anti-particle
What happens in annihilation?
A particle and corresponding anti-particle meet and their mass is converted into 2 photons traveling in opposite directions to conserve momentum
What is anti-matter?
Particles that have the same mas as their corresponding matter particle but all other properties are the opposite
What is a lepton?
A type of particle that does not experience the SNF and is fundamental
What is a hadron?
A particle that does experience the SNF and is made up of smaller particles
What is the difference between a baryon and a meson?
A baryon is made of 3 quarks, and a meson is made of a quark and an anti-quark
What are the 6 mesons
Pion+, pion0, pion-, kaon+, kaon0, kaon-
What’s the strangeness of each of the kaons?
K+= +1
K0= +1
K-= -1
What is the quark structure of a proton?
Up, up, down
What’s the quark structure of a neutron?
Up, down, down
What is the only stable baryon?
Proton, and all other baryons decay into it
What do kaons decay into?
Pions
