Atomic and nuclear properties of shielding concrete
QuantityValueUnits ValueUnits
<Z/A> 0.50274     
Specific gravity 2.300 g cm-3   
Mean excitation energy 135.2 eV   
Minimum ionization 1.711 MeV g-1cm2 3.935 MeV cm-1
Nuclear collision length 65.1 g cm-2 28.32 cm
Nuclear interaction length 97.5 g cm-2 42.39 cm
Pion collision length 91.9 g cm-2 39.96 cm
Pion interaction length 128.6 g cm-2 55.92 cm
Radiation length 26.57 g cm-2 11.55 cm
Critical energy 49.90 MeV (for e-) 48.50 MeV (for e+)
Molière radius 11.29 g cm-2 4.909 cm
Plasma energy ℏωp 30.99 eV   
Muon critical energy 701. GeV   
Composition:
Elem ZAtomic frac* Mass frac
H
1
1.00
0.010000
C
6
0.01
0.001000
O
8
3.33
0.529107
Na
 11
0.07
0.016000
Mg
 12
0.01
0.002000
Al
 13
0.13
0.033872
Si
 14
1.21
0.337021
K
19
0.03
0.013000
Ca
 20
0.11
0.044000
Fe
 26
0.03
0.014000
* calculated from mass fraction data

For muons, dE/dx = a(E) + b(E) E. Tables of b(E): PDF TEXT
Table of muon dE/dx and Range: PDF TEXT
Explanation of some entries
Note: Standard shielding blocks, typical composition O%2# 0.52, Si 0.325, Ca 0.06, Na 0.015, Fe 0.02, Al 0.04
plus reinforcing iron bars, from CERN-LRL-RHEL Shielding exp., UCRA-17841.