Atomic and nuclear properties of water (ice) (H2O)
QuantityValueUnits ValueUnits
<Z/A> 0.55509     
Specific gravity 0.9180 g cm-3   
Mean excitation energy 79.7 eV   
Minimum ionization 1.984 MeV g-1cm2 1.822 MeV cm-1
Nuclear collision length 58.5 g cm-2 63.73 cm
Nuclear interaction length 83.3 g cm-2 90.77 cm
Pion collision length 86.0 g cm-2 93.68 cm
Pion interaction length 115.2 g cm-2 125.5 cm
Radiation length 36.08 g cm-2 39.31 cm
Critical energy 78.60 MeV (for e-) 76.50 MeV (for e+)
Molière radius 9.73 g cm-2 10.60 cm
Plasma energy ℏωp 20.57 eV   
Muon critical energy 1031. GeV   
Melting point 273.1 K 0.000E+00 C
Boiling point @ 1 atm 373.1 K 99.96 C
Index of refraction (Na D) 1.309     
Composition:
Elem ZAtomic frac* Mass frac
H
1
2.00
0.111894
O
8
1.00
0.888106
* 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