Activity Conversion

Amount Unit < - > Amount Unit
-
Bq/Curies < - > Curies/Bq


1Ci = 3.7 x 1010Bq
1Bq = 1 Bequerel = 1 dps (disintegration per second)
1cps = 1 count per second = 1 dpm/60



Dose Conversion

Quality
Factor
Amount Unit < - > Amount Unit
-


7.5 mrem = 75microSv
Unit of Dose Equivalent - Sieverts (Sv) formerly rem
Unit of Absorbed Dose - Gray (Gy) formerly rad
1 Gy = 1 Joule/Kg
Gy x QF (quality factor) = Sv



Decay Correction

Nuclide Known Activity Known Activity Date <-> New Date Calculated Activity
Bq - Bq


Table of Nuclides

 

Unit Prefix
T Tera = 1012
G Giga = 109
M Mega = 106
K Kilo = 103
m milli = 10-3
µ micro = 10-6
n nano = 10-9
p pico = 10-12






Examples of Quality Factors
Xray, Gamma & Beta 1
Protons 2
Neutrons 2.5 to 20
Alpha, Multiple Charged Particle 20