Particles Flashcards
What is an isotope?
Atoms with the same number of protons but different number of neutrons
At what range does the SNF have no effect?
Above 3 fento meters
At what range does the SNF change from being attractive to repulsive?
0.5 fentometers
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 its corresponding anti-particle meet and their mass is converted into 2 photons travelling in opposite directions to conserve momentum
What is anti-matter?
Particles that have the same mass as their corresponding matter particle but all other properties (such as charge) are the opposite.
What is a lepton?
A type of particle which does not experience the strong nuclear force and is also fundamental (cannot be split into anything smaller)
What is a hadron?
A particle which does experience the strong nuclear force and is made of smaller particles
What is the difference between a baryon and a meson?
A baryon is made up of 3 quarks whereas mesons are made of 2 quarks
What are the 6 mesons?
Pion plus,pion minus,pion 0,kaon plus,kaon minus,kaon 0
What is the strangeness of each the of K mesons?
K+ is +1,K0 is +1,K- is -1
What is the quark structure of a proton?
udu
What is the quart structure of a neutron?
udd
Name the 4 fundamental forces and their exchange particles
Gravity- graviton
Electromagnetic- virtual photon
Weak nuclear- W+ and W-
Strong nuclear- pion (gluon)
What is one electron volt in joules?
1.6x 10^-19 J
