Dose 2016

Energy dependence detectors

Max ratio ~115 at 40 keV

Z

=47

Ag

Max ratio ~8 at 30 keV

Z

=14

Si

Max ratio ~1.1 at 30 keV

Z

(Air)≈7.6

eff

Z

(water)≈7.4

eff

Min ratio ~0.33 at 15 keV

Z

(Isooctane)≈5.4

eff

How does this influence measurements in high- energy (MV) beams ?