Atomic and nuclear properties of phosphorus (P)
QuantityValueUnits ValueUnits
Atomic number 15     
Atomic mass 30.973762(5) g mole-1   
Specific gravity 2.200 g cm-3   
Mean excitation energy 173.0 eV   
Minimum ionization 1.613 MeV g-1cm2 3.548 MeV cm-1
Nuclear collision length 71.7 g cm-2 32.59 cm
Nuclear interaction length 111.4 g cm-2 50.62 cm
Pion collision length 97.5 g cm-2 44.33 cm
Pion interaction length 140.7 g cm-2 63.97 cm
Radiation length 21.21 g cm-2 9.639 cm
Critical energy 37.92 MeV (for e-) 36.84 MeV (for e+)
Molière radius 11.86 g cm-2 5.391 cm
Plasma energy ωp 29.74 eV   
Muon critical energy 552. 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 Warning: may not be current
x ray mass attenuation coefficients