Week 3 OR Biology 1 part 1

Question 1

interaction of x-ray with matter

gives all its energy to inner orbital electron. photon ceases to exist

Answer 1

photoelectric absorption

photoelectric absorption

Question 2

most photoelectric interactions occur in 1s orbital because

photoelectrons only travel

Answer 2

the e- density is greatest in this region

short distances in the patient before giving up their energy through secondary ionization. does NOT contribute to film

Question 3

characteristic radiation is generated when

Answer 3

inner orbital vacancy is filled, but has such low energy that it is absorbed by patient and does not fog the film

Question 4

Compton scattering

Likelihood of Compton interactions

Answer 4

incident photon collides with outer orbital e-. photon is scattered and gives some energy to e-

Question 5

eject e- from outer orbital

Answer 5

recoil electron