Page 6 - Radiation Safety
P. 6
RADIATION UNIT
PHYSICAL QUANTITY SI UNIT OLD UNIT RELATIONSHIP
10
Activity Becquerel (Bq) Curie (Ci) 1 Ci = 3.7 x 10 Bq
1 Bq = 2.7 x 10 -11 Ci
-4
Exposure Coulomb per Roentgen (R) 1 R = 2.58x10 C/kg
kilogram (C/kg) 1 C/kg = 3876 R
Absorbed Dose Gray (Gy) rad 1 rad = 0.01 Gy
1 Gy = 100 rad
Equivalent Dose / Sievert (Sv) rem 1 rem = 0.01 Sv
Effective Dose 1 Sv = 100 rem
