Atomic and nuclear properties of materials:
Technetium (Tc)
QuantityValueUnits ValueUnits
Atomic number 43     
Atomic mass [97.90722(3)] g mole-1   
Density 11.5 g cm-3   
Mean excitation energy 428.0 eV   
Minimum ionization 1.325 MeV g-1cm2 15.24 MeV cm-1
Nuclear collision length 93.5 g cm-2 8.132 cm
Nuclear interaction length 156.8 g cm-2 13.64 cm
Pion collision length 118.1 g cm-2 10.27 cm
Pion interaction length 184.7 g cm-2 16.06 cm
Radiation length 9.58 g cm-2 0.8331 cm
Critical energy 13.46 MeV (for e-) 13.01 MeV (for e+)
Molière radius 15.09 g cm-2 1.313 cm
Plasma energy 64.76 eV   
Muon critical energy 232. GeV   
Melting point 2430. K 2157. C
Boiling point @ 1 atm 4538. K 4265. C
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: Since there is no stable isotope, [atomic mass] is that of the longest-lived known isotope as of Jan 2007.
Table of isotopes Warning: may not be current
x ray mass attenuation coefficients