Particle Physics Flashcards
Below 1fm the string nuclear force is…
repulsive
Above 1fm the string nuclear force is…
Attractive
What is the range of the weak nuclear force?
Around 10^-18m
What is the weak nuclear force responsible for?
Beta decay
What are the two main categories of particles?
Hadrons and Leptons
Which are fundamental hadrons or leptons?
Leptons
How many quarks do Baryons have?
3
What are the two types of Hadrons?
Baryons and Mesons
What are mesons made from?
A quark and antiquark
What is a proton made from?
2 up quarks, one down quark
What is a nuetron made from?
2 down quarks, 1 up quark
What are the six leptons?
Electron, Electron neutrino, muon, muon neutrino, tau neutrino, tau
Give examples of bosons
Photons, gluon, Higgs, z and w
Do leptons experience the strong nuclear force?
No
What is the charge of an up quark?
+2/3
What is the charge of a down quark?
-1/3 e
What charge does a strange quark have?
-1/3
What does the weak nuclear force do?
Causes the transformation of quarks via the emission of leptons
What are the products in beta minus decay?
an electron and antinuetrino
What are the products in beta plus decay?
a positron and neutrino
What is the mass defect?
Mass of all nucleons - Mass of nucleus
What is a thermal nuetron?
A nuetron with an EK similar to that of those in a reactor core, a slow moving electron
What is the role of the moderator in a fission reactor?
Slows down nuetrons
What is the role of the control rods?
Absorb nuetrons (made from boron/ cadmium)
