Radioactivity units
.
:.
.
-
.
-
Becquerel (Bq)
.
( curie
3.7*107
1 curie ( ci ) = 3.7*107 Decay/sec
1 curie ( ci ) = 3.7*107
Bq
106
1 Rutherford = 106 Decay/ sec
1 Rutherford = 106 Bq
The exposure unit X
-:
.
)
-:
(
760
(
3
(
-
)
.
:
(
) dQ
.
( X)
:
(dm
.Rontgen
( 2.5 *10 4 )
"
(
:
)
.
I R = 2.58 x 104 Coulomb/kg air
The absorbed dose unit ( D)
( dE )
.(dm)
(
)
:
D
D= d E/dm
.
Gray (Gy)
rad
"
(100
.
Gy = 100 rad
The equivalent dose (H)
Relative biological effectiveness
(RBE)
Rem
RBE
Gray "
"
(Seivert ( Sv)
(Gy)
.(
) . (Rem)
-:
1 Seivert = 100 Rem