Units (1) Flashcards
1
Q
Units for exposure
A
Based on a measurable quantity of ionizing radiation in air.
CGS:
- R
- Roentgen
SI:
- C/kg
- Coulombs per kilogram
2
Q
R to C/kg
A
1R = 2.58x10⁻⁴C/kg
3
Q
Unit for biological effect
A
Amount of ionizing energy incident upon living tissue to release 100ergs/1j of energy per kg.
CGS:
- rad (100ergs/kg
- (Radiation Absorbed Dose)
SI:
- Gy (1j/kg)
- Gray
4
Q
rad to Gy
A
1 rad = 0.01Gy
5
Q
What is an erg or j?
A
Unit of energy and work
6
Q
Unit for weighting factor
A
Used to provide a weighting factor for the biological effect of the various types of radiation.
CGS:
- RBE
- (Relative Biological Effectiveness)
SI:
- Q
- (Quality Factor)
7
Q
RBE/Q ratings for different types of radiation
A
1 = gamma, beta, x-ray 10 = neutrons 20 = alpha
8
Q
Unit for dose equivalent
A
Total absorbed dose once all factors (type of radiation, weighting, RBE/Q) have been considered.
CGS:
- rem
- (Roentgen Equivalent-to-man)
SI:
- Sv
- Sievert
9
Q
rem to Sv
A
1rem = 0.01 Sv 1Sv = 100rem
