Particles Flashcards
(26 cards)
What are the nucleons?
Protons and Neutrons
Which lepton was the first fundamental particle found?
Electron
What is an Isotope?
It has the same number of protons, but a different number of neutrons.
How do you calculate Specific Charge
Charge divided by the mass
Which force keeps the nucleus stable and only has short range attraction up to 3fm?
Strong nuclear force
Where is the strong nuclear force repulsive?
Closer than 0.5fm
When a particle and its antiparticle meet, there is……
Annihilation resulting in two photons.
When a photon produces a particle and its antiparticle, it is called…..
Pair production.
The anti-electron is called the…..
Positron
Name the 6 quarks
up, down,
strange, charm,
top, bottom
Name all 6 leptons
Electron, Electron neutrino,
Muon, Muon neutrino,
Tau, Tau neutrino
Name the four fundamental forces and their bosons
Strong (Gluon)
Electromagnetic (photon)
Weak (W+, W-, Z0)
Gravity (graviton ?)
What are the quarks in a proton?
u u d
What are the quarks in a neutron?
d d u
What are the quarks in a K+ meson?
up, antistrange
What are the quarks in a pi-zero meson
up and antiup or
down and anti down or
Strange and antistrange
What are the quarks in a pion- meson
down, anti up.
All mesons are made of……
a quark and and antiquark
All baryons are made of
Three quarks
What types of particles are hadrons?
Mesons and Baryons.
Leptons can change into other leptons in what interaction?
Weak
Strange particles all decay through which interactions?
Weak.
Strangeness is always conserved in what interactions?
Strong
Momentum is always conserved in what interactions?
All interactions.
