Quantum and particles flashcards
Define pair-production
When 2 gamma photons spontaneously create an particle antiparticle pair
Define Annihilation
When a particle antiparticle pair collide resulting in 2 gamma photons being created
Define the work function
The minimum amount of energy a photon needs to have such that when an electron absorbs it it can be liberated from a metal’s surface
Define threshold frequency
The minimum frequency a photon needs such that an electron at the surface of a metal is liberated upon absorbing it.
Define nucleon number
Total number of protons + neutrons
what does specific mean in physics
A characteristic of a property of a specific substance e.g specific charge = charge per unit mass so the specific means per unit mass
Define nuclide
A specific isotope that is characterized by its distinct number of protons and neutrons.
Define an isotope
An atom of the same element with the same number of protons but a different number of neutrons
What is the distance at which the strong nuclear force becomes repulsive
0.5-3fm femtometres
What does the graph of the strong nuclear force’s effectiveness look like
An upside down inverted maxwell boltzman distribution maximum around 1fm approaches 0 beyond 3 femtometers
Give the products of beta minus decay
Proton+electron+anti electron neutrino
Give the products of beta plus decay
Neutron positron and electron neutrino
Give one of the equations for Kaon decay
