Atomic and nuclear properties of materials:
UNCONFIRMED Element 114
Status as of January 2007 (pdf)

Quantity	Value	Units
Atomic number	114
Atomic mass	[289.187(5)]	g mole-1
Density	??	g cm-3
Minimum ionization	1.080	MeV g-1cm2
Nuclear collision length	125.4	g cm-2
Nuclear interaction length	223.0	g cm-2
Pion collision length	147.9	g cm-2
Pion interaction length	248.8	g cm-2
Radiation length	5.08	g cm-2
Critical energy	5.75	MeV (for e-)
Molière radius	18.74	g cm-2
Plasma energy	67.70	eV
Muon critical energy	112.	GeV

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
Explanation of some entries
Note: One of the atomic masses reported by the JINR-LLNL group is given.
Note: Density 14.0 g/cm³ and I_eff = 1185 eV assumed in calculating critical energies and dE/dx.