Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
|
what can protect from alpha particles
|
paper, skin, clothes
4 alpha 2 |
|
|
what can protect from beta particles
|
light metal, glass, plastic
0 Beta -1 |
|
|
what can protect from positron particles
|
light metal, glass, plastic
0 P 1 |
|
|
what can protect from gamma rays
|
heavy metal, earth, concrete
0 gamma 0 |
|
|
what can protect from neutrons
|
concrete, water, oil, polyethylene
1 N 0 |
|
|
what are the properties of non-ionizing radiation
|
essential to life w/o causing seperation of molecules ore removing electrons frm atoms, low health hazard
|
|
|
what are some examples of non-ionizing radiation
|
microwaves
radiowaves ultrasound magnetic fields |
|
|
what unit measures gamma and x rays emitted ionizing radiation in a mass of air
|
roentgen (R)
|
|
|
what unit measures the amount of any type of radiation energy actually absorbed in some material
|
radiation absorbed dose (RAD)
DOESN'T DESCRIBE BIOLOGICAL EFFECTS |
|
|
what unit measures the absorbed dose in human tissue to the effective biological damage of radiation
|
roentgen equivalent man (REM)
|
|
|
a unit for measuring radioactiity is useful to look at when radioisotope or radioactive material is being shipped and how much radioactivity at the time of production and how much its decayed over time
|
curie
|
|
|
how much radiation do we get yearly
|
360mrem/yr
|
|
|
where does the majority of our radiation come from
|
radon
|
|
|
what type of radiation causes skin cancer
|
cosmic
|
|
|
how much time is loss off life expectancy due to normal radiation exposure
|
15 days
|
|
|
how much time is loss off life expectancy due to higher radiation exposure (1 rem/yr)
|
51 days
|
|
|
what is the federal exposure limit for pregnant women and children under 18
|
.5 rem/yr or pregnancy
|
|
|
what is the annual exposure for most nuclear workers
|
5 rem/yr
|
|
|
what is the relationship btwn radiation dose and time in field
|
they are proportional
the longer you stay in the field the more likely you are to be exposed |
|
|
what is the relationship btwn distance and radiation
|
radiation dose = 1/(distance)2rd
double distance dose reduced to 1/4 |
|
|
what is I-131 used to treat
|
thyroid diseases
|
|
|
what can you treat I-131 over dose with
|
potassium iodide diuretics (competes w/ I-131 to bind thyroids so more I-131 gets excreted) (300 first dose 130 qd)
perchlorate (200 first dose, 100 q 5hrs) |
|
|
what can you treat Tritium over dose with
|
forced diuresis (would exchange H from water to remove radioactive H)
use of diuretics hemodialysis water to dilute tritium for urinary excretion |
