Radiation

Question 1

5 types of radioactive decay?

Answer 1

1. alpha particles
2. beta particles
3. gamma rays
4. positrons
5. capture of electrons

Question 2

What type of shielding typically prevents passage of alpha, beta, gamma?

Answer 2

alpha - piece of paper
beta - human
gamma - several feet of lead

Question 3

1 Sievert = ? rem

Answer 3

1 sVm = 100 rads

Question 4

Difference between rem and rad?

Answer 4

rem takes into account the type of radiation

Question 5

Most common natural radiation exposure?

Answer 5

Radon

Question 6

Most frequently ingested form of radiation?

Answer 6

40K.

Question 7

Stochastic effect

Answer 7

No dose of radiation too small to have potential to cause cancer.

Question 8

4 stages of acute radiation sickness?

Answer 8

1. prodromal phase
2. latent period
3. manifest illness
4. recovery stage

Question 9

Dose of Gy/rads exposure for Acute radiation sickness: CNS, GI, hematopoietic?

Answer 9

CNS - 15 Gy (1500 rads)
GI - 6 Gy (600 rads)
Hematopoietic - 1 Gy (100 rads)

Question 10

2 variables in radiation dose estimation?

Answer 10

emesis

time to lymphopenia

Question 11

Americium - source of radiation

Answer 11

smoke detectors

Question 12

Technetium - source of radiation

Answer 12

medical imaging