Please enable JavaScript.
Coggle requires JavaScript to display documents.
Particles & Radiation - Coggle Diagram
Particles & Radiation
Atomic Structure
Stability of Nuclei
Forces of the Nucleus
EM Force: protons repel
Gravity: nucleons attract
Strong Nuclear Force: Keeps Ps from flying off
Repulsive for <0.5fm
Attractive between about 0.5fm - 3fm
Nuclear Decay
Alpha Decay
Only in very big atoms. They emit an alpha particle
α have short range (a few cm) - can observe in cloud chamber
Beta-minus decay
Emits an electron from the nucleus and an anit-electron-neutrino
Antiparticles and Photons
Pair Production
Lots of energy makes particles with anti-particle pairs.
p hits p and makes another p but also an
photon to e+ and e-
Needs 2x the rest energy of the particle
Annihilation
particle + its antiparticle = annihilation
all mass gets put back into 2 gamma ray photons in opposite directions
Hadron & Leptons
Hadrons
Can feel StrongNF
Made of quarks
Baryons
E.g. Protons and Neutrons
Antibaryons annihilate with baryons so not often found
Baryon No.
MUST BE CONSERVED
AntiB's have -ve B no.
Mesons
