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| NIST Atomic Spectra Database Ionization Energies Data
Np (all spectra) |
Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2024). NIST Atomic Spectra Database (ver. 5.12), [Online]. Available: https://physics.nist.gov/asd [2025, July 12]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
BibTex Citation (new window)
|
| At. Num. | Ion Charge | El. name | Ionization Energy (eV) |
Uncertainty (eV) |
References |
|---|---|---|---|---|---|
| 93 | 0 | Neptunium | 6.265608 | 0.000019 | L23048 |
| 93 | +1 | Neptunium | [11.5] | 0.4 | L13741c99 |
| 93 | +2 | Neptunium | [19.7] | 0.4 | L13741c99 |
| 93 | +3 | Neptunium | [33.8] | 0.4 | L13741c99 |
| 93 | +4 | Neptunium | (48.0) | 1.9 | L8672c99 |
| 93 | +5 | Neptunium | (65.0) | 2.0 | L8672c99 |
| 93 | +6 | Neptunium | (92) | 5 | L582 |
| 93 | +7 | Neptunium | (107) | 5 | L582 |
| 93 | +8 | Neptunium | (121) | 6 | L582 |
| 93 | +9 | Neptunium | (136) | 7 | L582 |
| 93 | +10 | Neptunium | (151) | 8 | L582 |
| 93 | +11 | Neptunium | (179.0) | 2.5 | L8672c99 |
| 93 | +12 | Neptunium | (196) | 3 | L8672c99 |
| 93 | +13 | Neptunium | (233) | 3 | L8672c99 |
| 93 | +14 | Neptunium | (252) | 3 | L8672c99 |
| 93 | +15 | Neptunium | (355) | 3 | L8672c99 |
| 93 | +16 | Neptunium | (382) | 3 | L8672c99 |
| 93 | +17 | Neptunium | (408) | 3 | L8672c99 |
| 93 | +18 | Neptunium | (438) | 3 | L8672c99 |
| 93 | +19 | Neptunium | (466) | 4 | L8672c99 |
| 93 | +20 | Neptunium | (495) | 4 | L8672c99 |
| 93 | +21 | Neptunium | (535) | 4 | L8672c99 |
| 93 | +22 | Neptunium | (565) | 4 | L8672c99 |
| 93 | +23 | Neptunium | (596) | 4 | L8672c99 |
| 93 | +24 | Neptunium | (626) | 4 | L8672c99 |
| 93 | +25 | Neptunium | (770) | 40 | L582 |
| 93 | +26 | Neptunium | (810) | 40 | L582 |
| 93 | +27 | Neptunium | (850) | 40 | L582 |
| 93 | +28 | Neptunium | (880) | 40 | L582 |
| 93 | +29 | Neptunium | (980) | 50 | L582 |
| 93 | +30 | Neptunium | (1 020) | 50 | L582 |
| 93 | +31 | Neptunium | (1 130) | 60 | L582 |
| 93 | +32 | Neptunium | (1 170) | 60 | L582 |
| 93 | +33 | Neptunium | (1 280) | 60 | L582 |
| 93 | +34 | Neptunium | (1 360) | 70 | L582 |
| 93 | +35 | Neptunium | (1 430) | 70 | L582 |
| 93 | +36 | Neptunium | (1 510) | 70 | L582 |
| 93 | +37 | Neptunium | (1 590) | 80 | L582 |
| 93 | +38 | Neptunium | (1 670) | 80 | L582 |
| 93 | +39 | Neptunium | (1 740) | 90 | L582 |
| 93 | +40 | Neptunium | (1 820) | 90 | L582 |
| 93 | +41 | Neptunium | (1 910) | 100 | L582 |
| 93 | +42 | Neptunium | (1 990) | 100 | L582 |
| 93 | +43 | Neptunium | (2 070) | 100 | L582 |
| 93 | +44 | Neptunium | (2 140) | 110 | L582 |
| 93 | +45 | Neptunium | (2 230) | 110 | L582 |
| 93 | +46 | Neptunium | (2 310) | 110 | L582 |
| 93 | +47 | Neptunium | (2 675) | 4 | L8672c99 |
| 93 | +48 | Neptunium | (2 745) | 4 | L8672c99 |
| 93 | +49 | Neptunium | (2 817) | 4 | L8672c99 |
| 93 | +50 | Neptunium | (2 894) | 4 | L8672c99 |
| 93 | +51 | Neptunium | (2 969) | 4 | L8672c99 |
| 93 | +52 | Neptunium | (3 041) | 4 | L8672c99 |
| 93 | +53 | Neptunium | (3 181) | 5 | L8672c99 |
| 93 | +54 | Neptunium | (3 255) | 5 | L8672c99 |
| 93 | +55 | Neptunium | (3 338) | 5 | L8672c99 |
| 93 | +56 | Neptunium | (3 413) | 5 | L8672c99 |
| 93 | +57 | Neptunium | (3 718) | 6 | L8672c99 |
| 93 | +58 | Neptunium | (3 792) | 6 | L8672c99 |
| 93 | +59 | Neptunium | (3 872) | 7 | L8672c99 |
| 93 | +60 | Neptunium | (3 947) | 10 | L8672c99 |
| 93 | +61 | Neptunium | (4 353) | 12 | L8672c99 |
| 93 | +62 | Neptunium | (4 441) | 15 | L8672c99 |
| 93 | +63 | Neptunium | (4 658) | 19 | L8672c99 |
| 93 | +64 | Neptunium | (4 744) | 24 | L8672c99 |
| 93 | +65 | Neptunium | (7 610) | 30 | L8672c99 |
| 93 | +66 | Neptunium | (7 770) | 40 | L8672c99 |
| 93 | +67 | Neptunium | (7 950) | 40 | L8672c99 |
| 93 | +68 | Neptunium | (8 130) | 50 | L8672c99 |
| 93 | +69 | Neptunium | (8 310) | 50 | L8672c99 |
| 93 | +70 | Neptunium | (8 480) | 60 | L8672c99 |
| 93 | +71 | Neptunium | (8 890) | 60 | L8672c99 |
| 93 | +72 | Neptunium | (9 070) | 70 | L8672c99 |
| 93 | +73 | Neptunium | (9 270) | 90 | L8672c99 |
| 93 | +74 | Neptunium | (9 450) | 90 | L8672c99 |
| 93 | +75 | Neptunium | (9 970) | 100 | L8672c99 |
| 93 | +76 | Neptunium | (10 130) | 110 | L8672c99 |
| 93 | +77 | Neptunium | (10 300) | 120 | L8672c99 |
| 93 | +78 | Neptunium | (10 470) | 120 | L8672c99 |
| 93 | +79 | Neptunium | (11 730) | 140 | L8672c99 |
| 93 | +80 | Neptunium | (11 930) | 150 | L8672c99 |
| 93 | +81 | Neptunium | (12 320) | 160 | L8672c99 |
| 93 | +82 | Neptunium | (12 500) | 170 | L8672c99 |
| 93 | +83 | Neptunium | (25 870) | 190 | L8672c99 |
| 93 | +84 | Neptunium | (26 300) | 200 | L8672c99 |
| 93 | +85 | Neptunium | (26 770) | 220 | L8672c99 |
| 93 | +86 | Neptunium | (27 210) | 240 | L8672c99 |
| 93 | +87 | Neptunium | (31 910) | 250 | L8672c99 |
| 93 | +88 | Neptunium | (32 500) | 300 | L8672c99 |
| 93 | +89 | Neptunium | (33 300) | 300 | L8672c99 |
| 93 | +90 | Neptunium | (33 722.2) | 0.7 | L16264c99 |
| 93 | +91 | Neptunium | (132 911) | 3 | L12128 |
| 93 | +92 | Neptunium | (135 202) | 4 | L19200 |
If you did not find the data you need, please inform the ASD Team.
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