Unit 5 - Interactions with Matter

"Photoelectric" interaction happens from:

• EMR

• Particles

"Ionization" interaction happens from:

• EMR

• Particles

"Excitation" interaction happens from:

• EMR

• Particles

"Pair Production" interaction happens from:

• EMR

• Particles

"Compton" interaction happens from:

• EMR

• Particles

"Bremsstrahlung" interaction happens from:

• EMR

• Particles

Bremsstrahlung is most likely to occur if a particle is somewhere in the inner electrons of the atom.

• True

• False

What is likely to happen when an alpha particle comes close to the end of its path.

• it starts speeding up

• less ionization because it has lost a lot of energy

• more ionization because it is in contact with matter longer

• it loses its charge and does not ionize as much

How would you describe the initial path of an alpha particle through matter.

• curved, but a smooth curve

• tortuous

• straight but occasionally bent when it hits an electron or a nucleus

• straight but occasionally bent when it hits a nucleus

The energy of the ejected electron in a photoelectric effect has the same amount of energy as the particle that hit it.

• True

• False