[skip navigation]
[ASD Home][Lines Query][Levels Query][List of Spectra][Ground States and Ionization Energies][Bibliography][Help] NIST Physical Measurement Laboratory
National Institute of Standards and Technology NIST Physical Measurement Laboratory
NIST Atomic Spectra Database
Ionization Energies Data

Ca (all spectra)
20 Data Rows Found

Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2014). NIST Atomic Spectra Database (ver. 5.2), [Online]. Available: http://physics.nist.gov/asd [2014, November 21]. National Institute of Standards and Technology, Gaithersburg, MD.
BibTex Citation (new window)
 

 At. Num.   El.  name   Isoel.  Seq.   Ground  Shells a   Ground  Level   Ionization  Energy b 
 (eV) 
 References 
20  Calcium  Ca  [Ar]4s2   1S0    6.11315520(25)            L8900 
20  Calcium  [Ar]4s   2S1/2    11.871718(4)               L7185,L7323 
20  Calcium  Ar  [Ne]3s23p6   1S0    50.91315(25)               L1405 
20  Calcium  Cl  [Ne]3s23p5   23/2    [67.2732(21)]               L11770 
20  Calcium  [Ne]3s23p4   3P2    [84.34(8)]                  L11770 
20  Calcium  [Ne]3s23p3   43/2    [108.78(25)]                 L7185 
20  Calcium  Si  [Ne]3s23p2   3P0    [127.21(25)]                 L7185 
20  Calcium  Al  [Ne]3s23p   21/2    147.24(12)                  L7185 
20  Calcium  Mg  [Ne]3s2   1S0    [188.54(6)]                  L7185 
20  Calcium  Na  [Ne]3s   2S1/2    [211.275(4)]                 L11770 
20  Calcium  Ne  1s22s22p6   1S0    [591.60(12)]                 L11770 
20  Calcium  1s22s22p5   23/2    [658.2(9)]                   L11770 
20  Calcium  1s22s22p4   3P2    [728.6(11)]                  L11770 
20  Calcium  1s22s22p3   43/2    [817.2(6)]                   L11770 
20  Calcium  1s22s22p2   3P0    [894.0(4)]                   L11770 
20  Calcium  1s22s22p   21/2    [973.7(3)]                   L11770 
20  Calcium  Be  1s22s2   1S0    [1 086.8(4)]                   L11770 
20  Calcium  Li  1s22s   2S1/2    (1 157.726(7))                 L16264c99 
20  Calcium  He  1s2   1S0    (5 128.8576(5))                L12128 
20  Calcium  1s   2S1/2    (5 469.8614(10))               L7188 
Notes:
Designations used in the ground shell lists:
[Ne] = 1s22s22p6
[Ar] = 1s22s22p63s23p6
Uncertainty is given in parentheses after the value. It is expressed in the units of the last decimal place of the value.

Query time: 0.1 sec

[ASD Home][Lines Query][Levels Query][List of Spectra][Ground States and Ionization Energies][Bibliography][Help] NIST Physical Measurement Laboratory