Atomic and nuclear properties of materials:
UNCONFIRMED Element 115
Status of ultraheavies as of April 2010 (pdf)

Quantity	Value	Units
Atomic number	115
Atomic mass	[288.192(6)]	g mole-1
Density	??	g cm-3
Mean excitation energy	1199.0	eV
Minimum ionization	1.092	MeV g-1cm2
Nuclear collision length	125.2	g cm-2
Nuclear interaction length	222.8	g cm-2
Pion collision length	147.8	g cm-2
Pion interaction length	248.6	g cm-2
Radiation length	4.99	g cm-2
Critical energy	5.71	MeV (for e-)
Molière radius	18.55	g cm-2
Plasma energy	68.11	eV
Muon critical energy	111.	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 = 1199 eV assumed in calculating critical energies and dE/dx.