NIST ASD Levels Output

M1 is the magnetic dipole transition which occurs only between states of the same parity.

E2 is the electric quadrupole transition which occurs only between states of the same parity.

M2 is the magnetic quadrupole transition which occurs only between states of different parities.

M3 is the magnetic octupole transition which occurs only between states of the same parities.

Two-photon transition occurs only between states of the same parity.

Hyperfine-induced transition may occur only in isotopes having non-zero nuclear spin.

Undefined transition type.

M1+E2 is a mix of a magnetic-dipole and an electric-quadrupole transition, both of which occur only between states of the same parity.

The oscillator strength is a dimensionless quantity which for strong lines (both in atoms and in ions) is of the order of unity.

This level/line may not be real.

This level was determined by interpolation or extrapolation of known experimental values or by semiempirical calculation; its absolute accuracy is reflected in the number of significant figures assigned to it.

Theoretical value.

Observed in absorption

Line or feature having large width due to autoionization broadening

Beam-foil measurement

Intensity is shared by several lines

Double line

Broad due to overexposure in the quoted reference

Line position estimated

Very hazy line

Superposed with neighbor line

See the original reference on other issues

Observed value given is actually the Ritz value rounded to 0.1 Å, e.g., Ne I

The relative positions of the levels within such a system are accurate within experimental uncertainties, but no experimental connection between this system and the other levels of the spectrum has been made.

This level may have substantial autoionization rate.

Band head

Blended with another line that may affect the wavelength and intensity

Complex line

Diffuse line

Forbidden line

Transition involving a level of the ground term

Hazy line

Line has hyperfine structure

Identification uncertain

Wavelength smoothed along isoelectronic sequence

Shaded to longer wavelengths

Masked by another line (no wavelength measurement)

Term assignment of the level is questionable

Perturbed by a close line

Asymmetric line

Easily reversed

Shaded to shorter wavelengths

Tentatively classified line.

Unresolved from close line

Wide line

Extrapolated wavelength

This wavelength is calculated on-line. The number of significant digits was obtained assuming the trailing zeros in the energies are insignificant, and thus the real accuracy may be higher.

This wavelength is calculated on-line with a proper account of significant digits

Unknown line type

Somewhat less intensity than the value given

A multiplet in the original compilation has been separated into its component lines and the transition probability was derived from the compiled value assuming spin-orbit coupling. This may decrease the listed accuracy, especially for weaker transitions.

Relative intensities provide a qualitative description of what the emission spectrum of a particular element in a particular (low-density) source looks like. More help.

NIST Atomic Spectra Database Levels Data Al II 219 Levels Found	Example of how to reference these results: Ralchenko, Yu., Kramida, A.E., Reader, J., and NIST ASD Team (2011). NIST Atomic Spectra Database (ver. 4.1.0), [Online]. Available: http://physics.nist.gov/asd [2011, November 2]. National Institute of Standards and Technology, Gaithersburg, MD.

Some data for neutral and singly-charged ions are available in the Handbook of Basic Atomic Spectroscopic Data

-------------------------------------------------------
Configuration     | Term   |   J |           Level    |
------------------|--------|-----|--------------------|
                  |        |     |                    |
2p6.3s2           | 1S     |   0 |           0        |
                  |        |     |                    |
3s.3p             | 3P*    |   0 |       37393.03     |
                  |        |   1 |       37453.91     |
                  |        |   2 |       37577.79     |
                  |        |     |                    |
3s.3p             | 1P*    |   1 |       59852.02     |
                  |        |     |                    |
3p2               | 1D     |   2 |       85481.35     |
                  |        |     |                    |
3s.4s             | 3S     |   1 |       91274.50     |
                  |        |     |                    |
3p2               | 3P     |   0 |       94084.96     |
                  |        |   1 |       94147.46     |
                  |        |   2 |       94268.68     |
                  |        |     |                    |
3s.4s             | 1S     |   0 |       95350.60     |
                  |        |     |                    |
3s.3d             | 3D     |   3 |       95549.42     |
                  |        |   2 |       95550.51     |
                  |        |   1 |       95551.44     |
                  |        |     |                    |
3s.4p             | 3P*    |   0 |      105427.52     |
                  |        |   1 |      105441.50     |
                  |        |   2 |      105470.93     |
                  |        |     |                    |
3s.4p             | 1P*    |   1 |      106920.56     |
                  |        |     |                    |
3s.3d             | 1D     |   2 |      110089.83     |
                  |        |     |                    |
3p2               | 1S     |   0 |      111637.33     |
                  |        |     |                    |
3s.5s             | 3S     |   1 |      120092.919    |
                  |        |     |                    |
3s.5s             | 1S     |   0 |      121366.725    |
                  |        |     |                    |
3s.4d             | 3D     |   3 |      121483.50     |
                  |        |   2 |      121483.92     |
                  |        |   1 |      121484.252    |
                  |        |     |                    |
3s.4f             | 3F*    |   2 |      123418.48     |
                  |        |   3 |      123420.45     |
                  |        |   4 |      123423.36     |
                  |        |     |                    |
3s.4f             | 1F*    |   3 |      123470.5      |
                  |        |     |                    |
3s.4d             | 1D     |   2 |      124794.13     |
                  |        |     |                    |
3s.5p             | 3P*    |   0 |      125703.14     |
                  |        |   1 |      125708.828    |
                  |        |   2 |      125721.703    |
                  |        |     |                    |
3s.5p             | 1P*    |   1 |      125869.015    |
                  |        |     |                    |
3s.6s             | 3S     |   1 |      132215.517    |
                  |        |     |                    |
3s.6s             | 1S     |   0 |      132778.633    |
                  |        |     |                    |
3s.5d             | 3D     |   2 |      132822.80     |
                  |        |   3 |      132822.89     |
                  |        |   1 |      132822.95     |
                  |        |     |                    |
3s.5f             | 3F*    |   2 |      133437.71     |
                  |        |   3 |      133443.08     |
                  |        |   4 |      133450.07     |
                  |        |     |                    |
3s.5f             | 1F*    |   3 |      133681.78     |
                  |        |     |                    |
3s.5d             | 1D     |   2 |      133916.368    |
                  |        |     |                    |
3s.5g             | 3G     |   4 |      134183.7      |
                  |        |     |                    |
3s.5g             | 1G     |   4 |      134183.7      |
                  |        |     |                    |
3s.5g             | 3G     |   5 |      134183.7      |
                  |        |   3 |      134183.7      |
                  |        |     |                    |
3s.6p             | 1P*    |   1 |      134919.40     |
                  |        |     |                    |
3s.6p             | 3P*    |   0 |      135012.285    |
                  |        |   1 |      135015.701    |
                  |        |   2 |      135022.127    |
                  |        |     |                    |
3s.7s             | 3S     |   1 |      138499.89     |
                  |        |     |                    |
3s.6f             | 3F*    |   2 |      138521.4      |
                  |        |   3 |      138538.9      |
                  |        |   4 |      138561.8      |
                  |        |     |                    |
3s.7s             | 1S     |   0 |      138800.60     |
                  |        |     |                    |
3s.6d             | 3D     |   2 |      138814.87     |
                  |        |   1 |      138814.87     |
                  |        |   3 |      138815.12     |
                  |        |     |                    |
3s.6f             | 1F*    |   3 |      139245.343    |
                  |        |     |                    |
3s.6d             | 1D     |   2 |      139289.15     |
                  |        |     |                    |
3s.6g             | 3G     |   3 |      139591.1      |
                  |        |   5 |      139591.1      |
                  |        |     |                    |
3s.6g             | 1G     |   4 |      139591.1      |
                  |        |     |                    |
3s.6g             | 3G     |   4 |      139591.1      |
                  |        |     |                    |
3s.7p             | 1P*    |   1 |      139918.98     |
                  |        |     |                    |
3s.7p             | 3P*    |   0 |      140090.0      |
                  |        |   1 |      140091.9      |
                  |        |   2 |      140095.7      |
                  |        |     |                    |
3p.3d             | 3F*    |   2 |      141084.89     |
                  |        |   3 |      141110.06     |
                  |        |   4 |      141143.05     |
                  |        |     |                    |
3s.8s             | 3S     |   1 |      142182.94     |
                  |        |     |                    |
3s.8s             | 1S     |   0 |      142363.06     |
                  |        |     |                    |
3s.7d             | 3D     |   1 |      142365.54     |
                  |        |   2 |      142365.69     |
                  |        |   3 |      142365.98     |
                  |        |     |                    |
3s.7f             | 1F*    |   3 |      142604.05     |
                  |        |     |                    |
3s.7d             | 1D     |   2 |      142609.27     |
                  |        |     |                    |
3s.7g             | 3G     |   4 |      142851.6      |
                  |        |   3 |      142851.6      |
                  |        |   5 |      142851.6      |
                  |        |     |                    |
3s.7g             | 1G     |   4 |      142851.6      |
                  |        |     |                    |
3s.8p             | 1P*    |   1 |      142961.20     |
                  |        |     |                    |
3s.8p             | 3P*    |   0 |      143165.4      |
                  |        |   1 |      143166.76     |
                  |        |   2 |      143170.04     |
                  |        |     |                    |
3s.7f             | 3F*    |   2 |      143265.83     |
                  |        |   3 |      143272.86     |
                  |        |   4 |      143283.75     |
                  |        |     |                    |
3s.9s             | 3S     |   1 |      144527.35     |
                  |        |     |                    |
3s.8d             | 3D     |   1 |      144642.0      |
                  |        |   2 |      144642.18     |
                  |        |   3 |      144642.45     |
                  |        |     |                    |
3s.9s             | 1S     |   0 |      144644.14     |
                  |        |     |                    |
3s.8d             | 1D     |   2 |      144782.23     |
                  |        |     |                    |
3s.8f             | 1F*    |   3 |      144784.45     |
                  |        |     |                    |
3s.9p             | 1P*    |   1 |      144941.10     |
                  |        |     |                    |
3s.8g             | 3G     |   3 |      144967.1      |
                  |        |   5 |      144967.1      |
                  |        |     |                    |
3s.8g             | 1G     |   4 |      144967.1      |
                  |        |     |                    |
3s.8g             | 3G     |   4 |      144967.1      |
                  |        |     |                    |
3s.8h             | 3H*    |   6 |      144992.2      |
                  |        |     |                    |
3s.8h             | 1H*    |   5 |      144992.2      |
                  |        |     |                    |
3s.8h             | 3H*    |   4 |      144992.2      |
                  |        |   5 |      144992.2      |
                  |        |     |                    |
3s.8f             | 3F*    |   2 |      145129.51     |
                  |        |   3 |      145131.93     |
                  |        |   4 |      145135.31     |
                  |        |     |                    |
3s.9p             | 3P*    |   0 |      145145.84     |
                  |        |   1 |      145151.06     |
                  |        |   2 |      145159.49     |
                  |        |     |                    |
3p.4s             | 3P*    |   0 |      145776.15     |
                  |        |   1 |      145834.70     |
                  |        |   2 |      145961.54     |
                  |        |     |                    |
3s.10s            | 3S     |   1 |      146112.14     |
                  |        |     |                    |
3s.9d             | 3D     |   2 |      146188.5      |
                  |        |   1 |      146188.5      |
                  |        |   3 |      146188.9      |
                  |        |     |                    |
3s.10s            | 1S     |   0 |      146192.1      |
                  |        |     |                    |
3s.9d             | 1D     |   2 |      146276.0      |
                  |        |     |                    |
3s.9f             | 1F*    |   3 |      146278.70     |
                  |        |     |                    |
3s.10p            | 1P*    |   1 |      146299.92     |
                  |        |     |                    |
3s.9g             | 3G     |   4 |      146416.9      |
                  |        |   5 |      146416.9      |
                  |        |     |                    |
3s.9g             | 1G     |   4 |      146416.9      |
                  |        |     |                    |
3s.9g             | 3G     |   3 |      146416.9      |
                  |        |     |                    |
3s.9h             | 3H*    |   4 |      146435.0      |
                  |        |     |                    |
3s.9h             | 1H*    |   5 |      146435.0      |
                  |        |     |                    |
3s.9h             | 3H*    |   6 |      146435.0      |
                  |        |   5 |      146435.0      |
                  |        |     |                    |
3s.9f             | 3F*    |   2 |      146499.90     |
                  |        |   3 |      146500.99     |
                  |        |   4 |      146502.47     |
                  |        |     |                    |
3s.10p            | 3P*    |   0 |      146594.85     |
                  |        |   1 |      146596.95     |
                  |        |   2 |      146602.10     |
                  |        |     |                    |
3s.11s            | 3S     |   1 |      147233.45     |
                  |        |     |                    |
3s.11p            | 1P*    |   1 |      147270.82     |
                  |        |     |                    |
3s.10d            | 3D     |   2 |      147286.65     |
                  |        |   3 |      147287.10     |
                  |        |   1 |      147288.0      |
                  |        |     |                    |
3s.11s            | 1S     |   0 |      147290.98     |
                  |        |     |                    |
3s.10d            | 1D     |   2 |      147344.89     |
                  |        |     |                    |
3s.10f            | 1F*    |   3 |      147346.67     |
                  |        |     |                    |
3s.10g            | 1G     |   4 |      147453.4      |
                  |        |     |                    |
3s.10g            | 3G     |   5 |      147453.4      |
                  |        |   4 |      147453.4      |
                  |        |   3 |      147453.4      |
                  |        |     |                    |
3s.10h            | 1H*    |   5 |      147467.0      |
                  |        |     |                    |
3s.10h            | 3H*    |   6 |      147467.0      |
                  |        |   5 |      147467.0      |
                  |        |   4 |      147467.0      |
                  |        |     |                    |
3s.10f            | 3F*    |   2 |      147502.76     |
                  |        |   3 |      147503.27     |
                  |        |   4 |      147504.12     |
                  |        |     |                    |
3s.11p            | 3P*    |   2 |      147574.4      |
                  |        |     |                    |
3s.12p            | 1P*    |   1 |      148004.49     |
                  |        |     |                    |
3s.12s            | 3S     |   1 |      148056.1      |
                  |        |     |                    |
3s.11d            | 3D     |   3 |      148093.2      |
                  |        |     |                    |
3s.12s            | 1S     |   0 |      148098.6      |
                  |        |     |                    |
3s.11d            | 1D     |   2 |      148135.13     |
                  |        |     |                    |
3s.11f            | 1F*    |   3 |      148135.9      |
                  |        |     |                    |
3s.11g            | 3G     |   3 |      148220.1      |
                  |        |   4 |      148220.1      |
                  |        |   5 |      148220.1      |
                  |        |     |                    |
3s.11g            | 1G     |   4 |      148220.1      |
                  |        |     |                    |
3s.11f            | 3F*    |   2 |      148252.37     |
                  |        |   3 |      148252.52     |
                  |        |   4 |      148253.08     |
                  |        |     |                    |
3s.13p            | 1P*    |   1 |      148584.44     |
                  |        |     |                    |
3s.13s            | 3S     |   1 |      148677.2      |
                  |        |     |                    |
3s.13s            | 1S     |   0 |      148709.8      |
                  |        |     |                    |
3s.12f            | 1F*    |   3 |      148735.66     |
                  |        |     |                    |
3s.12g            | 3G     |   5 |      148802.8      |
                  |        |   4 |      148802.8      |
                  |        |     |                    |
3s.12g            | 1G     |   4 |      148802.8      |
                  |        |     |                    |
3s.12g            | 3G     |   3 |      148802.8      |
                  |        |     |                    |
3s.12f            | 3F*    |   2 |      148825.7      |
                  |        |   3 |      148825.7      |
                  |        |   4 |      148825.7      |
                  |        |     |                    |
3s.14p            | 1P*    |   1 |      149053.98     |
                  |        |     |                    |
3s.14s            | 1S     |   0 |      149182.2      |
                  |        |     |                    |
3s.13f            | 1F*    |   3 |      149201.6      |
                  |        |     |                    |
3s.13g            | 1G     |   4 |      149255.5      |
                  |        |     |                    |
3s.13g            | 3G     |   5 |      149255.5      |
                  |        |   4 |      149255.5      |
                  |        |   3 |      149255.5      |
                  |        |     |                    |
3s.13f            | 3F*    |   2 |      149273.0      |
                  |        |   4 |      149273.0      |
                  |        |   3 |      149273.0      |
                  |        |     |                    |
3s.15p            | 1P*    |   1 |      149437.17     |
                  |        |     |                    |
3s.15s            | 1S     |   0 |      149557.1      |
                  |        |     |                    |
3s.14f            | 1F*    |   3 |      149571.0      |
                  |        |     |                    |
3s.14f            | 3F*    |   4 |      149629.0      |
                  |        |   3 |      149629.0      |
                  |        |   2 |      149629.0      |
                  |        |     |                    |
3s.16p            | 1P*    |   1 |      149751.2      |
                  |        |     |                    |
3s.16s            | 1S     |   0 |      149859.0      |
                  |        |     |                    |
3s.15f            | 1F*    |   3 |      149868.6      |
                  |        |     |                    |
3s.15f            | 3F*    |   4 |      149916.3      |
                  |        |     |                    |
3s.17p            | 1P*    |   1 |      150009.9      |
                  |        |     |                    |
3s.16f            | 1F*    |   3 |      150111.6      |
                  |        |     |                    |
3s.16f            | 3F*    |   4 |      150151.7      |
                  |        |   3 |      150151.7      |
                  |        |   2 |      150151.7      |
                  |        |     |                    |
3s.17f            | 1F*    |   3 |      150313.4      |
                  |        |     |                    |
3s.17f            | 3F*    |   3 |      150346.9      |
                  |        |   4 |      150346.9      |
                  |        |   2 |      150346.9      |
                  |        |     |                    |
3s.18f            | 1F*    |   3 |      150482.3      |
                  |        |     |                    |
3p.3d             | 3D*    |   1 |      150492.80     |
                  |        |   2 |      150517.17     |
                  |        |   3 |      150544.17     |
                  |        |     |                    |
3s.19f            | 1F*    |   3 |      150624.5      |
                  |        |     |                    |
3s.20f            | 1F*    |   3 |      150746.4      |
------------------|--------|-----|--------------------|
                  |        |     |                    |
Al III (2S1/2)    | Limit  | --- |      151862.7      |
------------------|--------|-----|--------------------|
                  |        |     |                    |
Al III (2P*1/2)   | Limit  | --- |      205545.6      |
-------------------------------------------------------

Query time: 0.3 sec