Interaction with Matter Flashcards
Exponential Attenuation
Half Value Layer
Radiant Energy
Radiative energy of uncharged particle entering V
Radiant energy of uncharged particle leaving V
Radiant energy of uncharged particle leaving V except that which originated from radiative losses of kinetic enerygy by charged particle while in V
Radiant energy emitted as radiative losses by charged particles which themselves originated in V, regardless of where the radiative loss event occured
Net Energy derived from rest mass in V
Energy Transferred (\epsilon_tr)
Net Energy Transferred (\epsilon_tr^n)
Energy Imparted (\epsilon)
Diffenence between energy transferred and net enerygy transferred
Net energy transferred is defined as energy transferred - radiant energy emitted as radiative losses by charged particles which themselves originated in V, regardless of where the radiative loss event occurred.
Kerma
Kinetic energy released per unit mass in the matter
Kerma Definition
The expectation value of the energy transferred to charged particles per unit mass at a point of interest, including radiative loss energy but excluding energy passed from one charged particle to another
Kerma is the first step of sissipating energy by indirectly ionizing radiation
Kerma Equation
Radiative energy of uncharged particle entering V
Radiant energy of uncharged particle leaving V
Radiant energy of uncharged particle leaving V except that which originated from radiative losses of kinetic enerygy by charged particle while in V
Radiant energy emitted as radiative losses by charged particles which themselves originated in V, regardless of where the radiative loss event occured
Net Energy derived from rest mass in V
Bremmstrahlung
Annihilation
Compton Scattering
Pair Production
Bremmstrahlung
Annihilation
Compton Scattering
Pair Production
Number of interactions in dx
Collision Kerma
Exposure (X)
- Defined only in air
- Only for x-rays or gamma rays
- less than 3 MeV
Roentgen from C/kg
UNITS
