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Environmental Mid-Term > Radiation > Flashcards

Flashcards in Radiation Deck (11)
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1

Describe mechanism of damage for microwave radiation.

Microwave radiation: interact with water to induce heating --> tissue damage

2

Describe mechanism of damage for infrared radiation.

Infrared radiation: heat --> burns, heat stress

3

Describe mechanism of damage of visible radiation.

Visible radiation: no effect on cells; can impact visual acuity

4

Describe 3 damaging effects of UV radiation.

UV radiation: sunburn, visual impairment, skin cancer

5

3 factors affecting EM radiation hazard are: time, distance, and shielding. Describe the relationship with respect to distance.

3 factors affecting EM radiation hazard are: time, distance, and shielding. % reduction = 1 / (d^2)

6

Which (4) forms of ionizing radiation can penetrate skin?

Beta, Neutrons, Gamma, Xray can penetrate skin; gamma has highest penetration

7

Describe gamma radiation in terms of its source, charge, and mass.

Gamma: released from nucleus of unstable radioactive atom; no charge or mass

8

Describe beta radiation in terms of its source, mass, and charge. What is it identical to?

Beta: emitted from nucleus of unstable atom; extremely small, charged; identical to electron

9

Describe alpha radiation in terms of source, mass, and charge.

Alpha: bare He nucleus (2 protons, no neutrons); high mass and charge

10

Describe acute effects of radiation in terms of threshold, dose, and targets (5).

Acute effects of radiation: definite threshold, requires high dose; hits skin (irritation, burn), repro (sterility); hematopoietic, gastrointestinal; CNS

11

Describe the interaction of radiation with living cells. What type of molecule is hit first? What molecules are produced? What effects do these molecules have?