Particle Physics Flashcards
(31 cards)
Annihilation
particle n antiparticle colliding and being converted to energy. energy release in 2 photons to conserver energy
Antiparticle
all particles have antiparticle with same mass but opposite charge n conservation numbers.
Baryon number
conserved in all particle interactions. baryons have B=+1 and non baryons B = 0
Baryon.
Class of hardon, 3 quarks. Proton = only stable baryon
B-
neutrin inside nucleus -> proton, emits B- parrticle n antineutrino
B+
proton inside nucleus -> neutron, emits B+ particle n neutrino
electron diffraction
spreading of electrons as they pass through a gap similar to magnitude of their de brog wavelength. It’s evidence of the wave-like properties of particles.
eV
work done to accelerate electron through pd of 1V. E=qv
Energy levels
energies which electrons can exist in an atom. electrons cannot exist between these levels
Excitation
process of electron taking in exactly the right quantity of energy to move it to higher level
gauge boson
exchange particles that transmit 4 fundamental interactions between particles
ground state
most stable energy level an electron can exist in
Hadrons
Class of subatomic particle that experiences strong force.
Ionisation
process of atom losing an electron n becoming charged.
kaon
type of meson that decays into pions
lepton number
quantum number that is conserved in all interactions. both electron lepton no n muon lepton no must be conserved.
lepton
group of subatomic particles consisting of electrons, muons,and neutrinos
meson
clas of hardon made of quark, anti quark
muon
type of lepton that decays into electron
neutrino
subatomic particle whose existence is hypothesised to maintain conservation of energy in beta decay
nucleon
proton or neutron
pair production
process of sufficiently high energy photon converting into particle and antiparticle. to converse momentum, usually occurs near nucleus
photon
packet of energy
pion
type of meson n exchange particle for strong force.
