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| NIST Atomic Spectra Database Ionization Energies Data
Ca (all spectra) |
Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2023). NIST Atomic Spectra Database (ver. 5.11), [Online]. Available: https://physics.nist.gov/asd [2024, May 3]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
BibTex Citation (new window)
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At. num | El. Name | Isoel. Seq. | Ground Shells (a) | Ground Level | Ionization Energy (eV) | Uncertainty (eV) | References
--------|----------|-------------|-------------------|--------------|--------------------------------------|----------------------|-------------
20 | Calcium | Ca | [Ar].4s2 | 1S0 | 6.11315547 | 0.00000025 | L8900
20 | Calcium | K | [Ar].4s | 2S<1/2> | 11.871719 | 0.000004 | L7185,L7323
20 | Calcium | Ar | [Ne].3s2.3p6 | 1S0 | 50.91316 | 0.00025 | L1405
20 | Calcium | Cl | [Ne].3s2.3p5 | 2P*<3/2> | [67.2732] | 0.0021 | L11770
20 | Calcium | S | [Ne].3s2.3p4 | 3P<2> | [84.34] | 0.08 | L11770
20 | Calcium | P | [Ne].3s2.3p3 | 4S*<3/2> | [108.78] | 0.25 | L7185
20 | Calcium | Si | [Ne].3s2.3p2 | 3P0 | [127.21] | 0.25 | L7185
20 | Calcium | Al | [Ne].3s2.3p | 2P*<1/2> | 147.24 | 0.12 | L7185
20 | Calcium | Mg | [Ne].3s2 | 1S0 | [188.54] | 0.06 | L7185
20 | Calcium | Na | [Ne].3s | 2S<1/2> | [211.275] | 0.004 | L11770
20 | Calcium | Ne | 1s2.2s2.2p6 | 1S0 | [591.60] | 0.12 | L11770
20 | Calcium | F | 1s2.2s2.2p5 | 2P*<3/2> | [658.2] | 0.9 | L11770
20 | Calcium | O | 1s2.2s2.2p4 | 3P<2> | [728.6] | 1.1 | L11770
20 | Calcium | N | 1s2.2s2.2p3 | 4S*<3/2> | [817.2] | 0.6 | L11770
20 | Calcium | C | 1s2.2s2.2p2 | 3P0 | [894.0] | 0.4 | L11770
20 | Calcium | B | 1s2.2s2.2p | 2P*<1/2> | [973.7] | 0.3 | L11770
20 | Calcium | Be | 1s2.2s2 | 1S0 | [1086.8] | 0.4 | L11770
20 | Calcium | Li | 1s2.2s | 2S<1/2> | (1157.726) | 0.007 | L16264c99
20 | Calcium | He | 1s2 | 1S0 | (5128.8576) | 0.0003 | L21139
20 | Calcium | H | 1s | 2S<1/2> | (5469.86358) | 0.00006 | L19200
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Notes:
(a) Designations used in the ground shell lists:
[Ne] = 1s2.2s2.2p6
[Ar] = 1s2.2s2.2p6.3s2.3p6
If you did not find the data you need, please inform the ASD Team.
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