Atomic and nuclear properties of dysprosium (Dy)

Quantity	Value	Units	Value	Units
Atomic number	66
Atomic mass	162.500(1)	g mole-1
Specific gravity	8.551	g cm-3
Mean excitation energy	628.0	eV
Minimum ionization	1.175	MeV g-1cm2	10.05	MeV cm-1
Nuclear collision length	106.7	g cm-2	12.48	cm
Nuclear interaction length	184.4	g cm-2	21.56	cm
Pion collision length	130.5	g cm-2	15.26	cm
Pion interaction length	211.4	g cm-2	24.72	cm
Radiation length	7.32	g cm-2	0.8561	cm
Critical energy	9.02	MeV (for e-)	8.70	MeV (for e+)
Molière radius	17.21	g cm-2	2.013	cm
Plasma energy ℏωp	53.70	eV
Muon critical energy	167.	GeV

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
Table of isotopes via WIKIPEDIA
x ray mass attenuation coefficients from NIST