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Practical significance of f(Q), k
bq
(Q)
➢
Using a detector at the same quality as calibration (Q
0
) is straightforward:
➢
Using a detector at a quality Q different than calibration (Q
0
):
cannot be generally assumed energy independent
must be calculated
must be measured
or taken from the literature for
matching
exp. conditions (Q, Q
0
, detector make,
size, set up, …)
)0(
,
)
.
(
)
0(
)
0(
QwAD
N
i
i
factor
corr
Q
M
Qw
D
=
)0 , (
)0 , (
)0( ,
)
.
(
)0(
)0(
) (
)0(
) (
)0( ,
)
.
(
)0(
)0( ,
) ( ,
)0( ,
)
.
(
)0(
) (
QQ rel
bq
kQQ rel f QwADN
i
i
factor
corr
QM
Qbqk
Qbqk
Qf
Qf
QwADN
i
i
factor
corr
QM
QwADN
QwADN
QwADN
i
i
factor
corr
QMQwD
=
=
=
=
=
rel
bq
k
rel f
,
rel f
rel
bq
k
f
rel
or k
rel
>1 => detector under-responds …!
f
rel
or k
rel
<1 => detector over-responds …!