Atomic and nuclear properties of water (liquid) (H2O)
QuantityValueUnits ValueUnits
<Z/A> 0.55509     
Specific gravity 1.000 g cm-3   
Mean excitation energy 79.7 eV   
Minimum ionization 1.981 MeV g-1cm2 1.981 MeV cm-1
Nuclear collision length 58.5 g cm-2 58.50 cm
Nuclear interaction length 83.3 g cm-2 83.33 cm
Pion collision length 86.0 g cm-2 86.00 cm
Pion interaction length 115.2 g cm-2 115.2 cm
Radiation length 36.08 g cm-2 36.08 cm
Critical energy 78.33 MeV (for e-) 76.24 MeV (for e+)
Molière radius 9.77 g cm-2 9.768 cm
Plasma energy ℏωp 21.47 eV   
Muon critical energy 1029. 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) 1.333     
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