607 / 1609
Air Kerma Strength S
K
The recommended unit for air kerma strength is µGy.m².h
-1
and has been denoted by
the symbol
U
:
1U = 1 µGy.m².h
-1
= 1
cGy.cm².h
-1
AAPM, North America
Reference Air Kerma Rate /
Source Strength
r
2
R K
)m1( K S
air