226
C. W. Fabjan and D. Fournier
0.05
0.10
0.50
Energy Deposit
[GeV/0.45
λ
INT ]
1.00
5.00
10.00
50.00
210 GeV
135 GeV
40 GeV
30 GeV
20 GeV
10 GeV
5 GeV
0
0.01
1 2 3 4 5 6
Calorimeter Depth [λ INT ]
7 8 9 10 11 12 13
Fig. 6.19 Measured longitudinal shower distributions for pions at three energies together with the
shower parameterization [37]
Fig. 6.20 Longitudinal shower development induced by hadrons in different materials, showing
approximate scaling in λ. The shower distributions are measured with respect to the face of the
calorimeter (left ordinate). The transverse distributions as a function of shower depth show scaling
in λ for the narrow core. The 90% containment radius is much larger and does not scale with λ
(right ordinate) [30]
showers in X 0 , see Fig. 6.20. Also shown are the transverse shower distributions:
the relatively narrow core is dominated by the high-energy (mostly electromagnetic)
component. The tails in the radial distributions are due to the soft, neutron-rich,
component. In Fig. 6.21 the fractional containment as a function of energy is shown,
exhibiting approximately the expected logarithmic energy dependence for a given
containment [38, 39].