Section 1: Particles & Radiation Flashcards
What is the realtionship between specific charge and mass?
specific charge is inversly proprtional to mass
How do you find specific charge?
Charge/ mass
What is meant by spesific charge of a particle? untis?
the ratio of its charge to mass (C kg-1)
describle how the strong nuclear force varies with the spereation of neuclons.
- repulsive then attractive
-short range (0.5- 2.5) fm ish - cross to atractive around 0.7 fm
-prevents protons and neutrons from moving closer or further apart
What neucles is the same as a alpha particle?
helium neucleus
What is the neuclon number?
number of protons and neurons, mass number
What guage boson is used in strong interaction? and what particles are effected?
guage boson - pion (0+-)
particles - hadrons
What guage boson is used in electromagnetic interaction? and what particles are effected?
virtual photon
only charged particles
What guage boson is used in weak interaction? and what particles are effected?
w+ w- bosons
all types of particles are effected
What is the equation for beta minus decay? and what is the guage boson present?
n—> p + electron + anti-neutrino. W-
What is the equation for beta plus decay? and why is the guage bosson present?
P—> n + (e+) + neutrino W+
What is the equation for electron capture? and what is the guage bosson present?
P + e- —> n + netrino W+
What is the equation for electron proton collision? What is the guage bosson present (why)?
Same as electron capture
P + (e-) —> n + neutrino
W- bosson because:
-comes from the electron
- W- to conserve charge
What do kaons decay into?
Pions
How do you find the minimum energy for anhilation?
min energy of EACH photon = rest mass