Atomic and nuclear properties of materials:
Potassium oxide (K2O)
QuantityValueUnits ValueUnits
<Z/A> 0.48834     
Density 2.32 g cm-3   
Mean excitation energy 189.9 eV   
Minimum ionization 1.615 MeV g-1cm2 3.747 MeV cm-1
Nuclear collision length 72.5 g cm-2 31.27 cm
Nuclear interaction length 112.9 g cm-2 48.64 cm
Pion collision length 98.7 g cm-2 42.52 cm
Pion interaction length 142.9 g cm-2 61.58 cm
Radiation length 18.90 g cm-2 8.147 cm
Critical energy 33.68 MeV (for e-) 32.70 MeV (for e+)
Molière radius 11.90 g cm-2 5.130 cm
Plasma energy 30.67 eV   
Muon critical energy 499. GeV   
Composition:
Elem ZAtomic frac* Mass frac*
O
8
1.00
0.169852
K
19
2.00
0.830148
* calculated from mass fraction data.

Explanation of some entries
For muons, dE/dx = a(E) + b(E) E. Tables of b(E): PS PDF TEXT
Table of muon dE/dx and Range: PS PDF TEXT