(1) Matter and radiation Flashcards
1
Q
Definition: Nucleon
A
A proton or neutron in the nucleus
2
Q
Explain Strong nuclear force in an atom.
A
Repulsive: 0-0.5fm
Attraction: 0.5-3fm
Force is negligible beyond 3fm.
3
Q
Match the fundamental force to the corresponding exchange particle:
Strong nuclear
Electromagnetic
Weak Force
Gravitational
A
Strong nuclear: Gluon
Electromagnetic: Virtual Photon
Weak Force: W+ W- Z0
Gravitational Graviton
4
Q
Beta- Decay
A
n–>p
0 B -1
Exerts an antineutron
5
Q
Annihilation:
A
Particle meets antiparticle
All mass gets converted to energy
6
Q
Pair Production:
A
Photon turns into particle, antiparticle pair
The min energy for a photon for pair production = total rest energy of the particles which are produced.
γ→ (e −) + (e +)
