NIST Physical Measurement Laboratory Handbook of Basic Atomic Spectroscopic Data

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Atomic Data for Radium (Ra)

Atomic Number = 88

Atomic Weight = 226.0254

Reference E95


Isotope    Mass        Abundance Spin Mag Moment

223Ra      223.018501  Some      1/2  
224Ra      224.020186  Some      0    
226Ra      226.025402  Some      0    
228Ra      228.031064  Some      0    

 
Ra I  Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p67s2  1S0
      Ionization energy  42573.36 cm-1 (5.278423 eV)   Ref. AWT80
 
Ra II Ground State 1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p67s  2S1/2
      Ionization energy  81842.31 cm-1 (10.14715 eV)   Ref. M58