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Elemental Data

Element Yb
Atomic Number 70
Atomic Weight 173.04(3)
Ionization Energy 6.2542 eV
Boiling Point 1660 K
Melting Point 1097 K
Density 6.965 g/cm3
Isotope abundance ratio atomic mass   I magnetic moment
168Yb = 0.13 % 167.933895   0  
170Yb = 3.05 % 169.934759   0  
171Yb = 14.3 % 170.936323   1/2   +0.4919
172Yb = 21.9 % 171.936378   0  
173Yb = 16.12 % 172.938207   5/2   -0.6776
174Yb = 31.8 % 173.938858   0  
176Yb = 12.7 % 175.942569   0  

Spectroscopic Data

Energy Level

Configuration Term   J   Energy Level (cm-1) Lande g-factor
  4f14(1S)6s2   1S   0     0.000
  4f14(1S)6s6p   3Po   0     17 288 .439
  1     17 992 .007   1.49282
  2     19 710 .388   1.50
  4f14(1S)5d6s   3D   1     24 489 .102   0.50
  2     24 751 .948   1.16
  3     25 270 .902   1.34
  4f14(1S)6s6p   1Po   1     25 068 .222   1.035
  4f14(1S)5d6s   1D   2     27 677 .665   1.01
  4f14(1S)6s7s   3S   1     32 694 .692   2.01

Line Data

Transition Wavelength in air (nm) Lower Level (cm-1) Upper Level (cm-1)   Aki (108 s-1)     fki  
  1S0 - 1P1   398.7986   0.000   25 068 .222   1.76e+00     1.26e+00  
  1S0 - 3P1   555.6481   0.000   17 992 .007   1.14e-02     1.58e-02  
  3P0 - 3S1   648.9078   17 288 .439   32 694 .692   4.6e-02      
  3P1 - 3S1   679.9602   17 992 .007   32 694 .692   1.4e-01      
  3P2 - 3S1   769.9487   19 710 .388   32 694 .692   2.1e-01      
See also "NIST Atomic Spectra Database" . Back to Hirano Group
http://qo.phys.gakushuin.ac.jp/~tojo/