Atomic and nuclear properties of sodium monoxide (Na₂O)

Quantity	Value	Units	Value	Units
<Z/A>	0.48404
Specific gravity	2.270	g cm-3
Mean excitation energy	148.8	eV
Minimum ionization	1.646	MeV g-1cm2	3.737	MeV cm-1
Nuclear collision length	65.8	g cm-2	28.97	cm
Nuclear interaction length	99.0	g cm-2	43.63	cm
Pion collision length	92.1	g cm-2	40.57	cm
Pion interaction length	129.4	g cm-2	57.00	cm
Radiation length	29.17	g cm-2	12.85	cm
Critical energy	53.04	MeV (for e-)	51.56	MeV (for e+)
Molière radius	11.66	g cm-2	5.137	cm
Plasma energy ℏωp	30.21	eV
Muon critical energy	735.	GeV

Composition:

Elem	Z	Atomic frac*	Mass frac
O	8	1.00	0.258143
Na	11	2.00	0.741857
* 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