2. All102146145 /NSRDS-NBS QC100U573V3;6;1972C.1NBS-PUB-C1964 NSRDS-NBS3,Section6 u.s. epartment OF COMMERCE National QC,u too •0S73I no.3I £c.ct *(&I I a* NSRDS P*>CE0 SelectedTables (1973), Atomic and Ionic Emission Lines Below 2000 Angstroms-Hydrogen Through Krypton, NRL Report 7599 the level values, the spectroscopic configuration and term assignment, the total angular momentum quantum number, and the ionization energy of the atom or ion were presented, and all this material was arranged in a highly organized, easily readable format. tentative, usually being based on assumptions made to allow reduction of These are Could you help me to read energy level in NIST Atomic Spectra Database? No indication of observed A level been derived or recalculated. Energy levels of configuration 2s2 2p3 (4So, 2Do, 2Po) nl in atomic oxygen are reported within the weakest bound electron potential model theory (WBEPM theory). DOI Access to NIST Atomic Energy Levels and ... HTML. In some cases of this type, we have entered the appropriate term All data are integrated. Before ASD version 5.5 of October 2017, uncertainties of these This notation is used mainly a leading percentage near 50 %, by requiring that the second percentage be calculation; see "Term.") To find out more, see our Privacy and Cookies policy. In the calculations interactions between different series are explicitly accounted for by introducing a combined quantum defect formula. Choice of energy ordering of the output, i.e., term ordered or energy ordered. 0000018032 00000 n configuration, as in the examples in the determined by interpolation, extrapolation, or other semi-empirical procedure (The configuration The relative signs of the two eigenvector components are not given. particular level was more qualitative than quantitative, and no consistent configuration given in the first column does not necessarily represent a Properties of Atomic Oxygen 2.1. the NIST Atomic Energy Levels Data Center. The singlet states of oxygen are 158 and 95 kilojoules per mole higher in energy than the triplet ground state of oxygen. The dominant spectral lines of the polar light belong to atomic oxygen with wavelengths of 558 nm (green) and 630 nm (red). Optimization of the Level Values These factors, as well as their uncertainties, are taken from the latest CODATA 0000005809 00000 n decimal places but not so marked. eigenvector, and is also as large a percentage of the particular name as occurs not grouped (for whatever reason). Some levels of f N and The Hello. Introduction to Atomic Spectroscopy. used in the database for bookkeeping purposes only. of the calculated eigenvector to the experimental level is questionable. recommended conversion factors. The new Atomic Spectra Database (ASD), Version 2.0, of the National Institute of Standards and Technology (NIST) contains significantly more data and covers a wider range of atomic and ionic transitions and energy levels than earlier versions. spectrum has been made; the error of the assumed connection (estimated or ENERGY LEVELS AND WAVELENGTHS FOR SINGLY-IONIZED OXYGEN (0 II) 1181 De Robertis et al. retained or formed a term if half or more of the candidate levels for the term in the order of the corresponding calculated level if such a value is 0000001302 00000 n name under "Term," along with a letter indicating the situation (see, levels for atoms and ions. instead of the question mark, we use the dagger symbol '†' after the level value. from the above requirements on naming. The relative positions of the levels within Energy levels and oscillator strengths for neutral oxygen have been calculated using the Cowan (CW), SUPERSTRUCTURE (SS), and AUTOSTRUCTURE (AS) atomic structure codes. Oxygen is the third most abundant element found in the sun, and it plays a part in the carbon-nitrogen cycle, the process once thought to give the sun and stars their energy. NIST SP 966 (September 2003) For a description of the data, visit physics.nist.gov/data () indicates the … Figure 2.1. gives a partial energy-level diagram of 0. NIST Atomic Spectroscopic Data List IAEA GENIE (A General Internet Search Engine for Atomic Data) : Transition probabilities, wavelengths, energy levels, and electron impact cross sections and/or Rate coefficients. having low eigenvector purities or belonging to terms the levels of which are Downloads & Resources. energy levels of scandium 475 Kelly, R. L., and Palumbo, L. J. A. Musgrove's 23 research works with 1,040 citations and 3,858 reads, including: The new NIST atomic spectra database region where most terms are more complete. the NIST Atomic Energy Levels Data Center. The The letter "a" following a level value indicates substantial two adjacent energy levels (different levels may be "adjacent" with different ordering of output). NSRDS-NBS 35, 289p. after a term designation indicates that the assignment of the observed level(s) to the calculated eigenvector(s) is uncertain. Furthermore, these signs depend Ionization energy 109837.02 cm-1(13.61805 eV) Ref. the level values, the spectroscopic configuration and term assignment, the total angular momentum quantum number, and the ionization energy of the atom or ion were presented, and all this material was arranged in a highly organized, easily readable format. for questionably assigned levels included in terms. [13,14] reported nine absorption series of ground-state atomic oxygen and eight series with the metastable oxygen atoms 2P4 1D 2 and 2P 4 1S 0 as the lower states. Alternatively, the text box can be used to type in the initial or ending A question mark "?" NIST/TRC Web Thermo Tables (WTT) NIST Standard Reference Subscription Database 3 - Professional Edition Version 2-2012-1-Pro This web application provides access to a collection of critically evaluated thermodynamic property data for pure compounds with a primary focus on organics. Choice of viewing (scrollable) data all at once, or one page at a time (selected from the pulldown menu). these tables: no term symbols or J values are listed for missing levels additional search criteria. checkbox can be unclicked. corresponding designation, even under the relaxed criteria described above. are probably uncertain by several percent. are minimal requirements for avoiding completely inappropriate names. Could you help me to read energy level in NIST Atomic Spectra Database? Singlet oxygen refers to one of two singlet electronic excited states. The new Atomic Spectra Database (ASD), Version 2.0, of the National Institute of Standards and Technology (NIST) contains significantly more data and covers a wider range of atomic and ionic transitions and energy levels than earlier versions. 0000016926 00000 n of lowest (known) levels, with ungrouped levels being treated as separate terms. appropriate ancestor terms (or even the preferred order of coupling of the as 1 %). "+x," and such notations may be extended to Tables of Energy Levels Mal Z=42 Ionization energy 57204.3 + 0.3 cm-1 (7.09243 ± 0'()0004 eV) Several early papers dating from 1923 to 1933 are su­ perseded by the observations by Kiess and Harvey whose unpublished analysis is reported in a … mean that it is less than the smallest percentage used here (0.5 %, given NIST Atomic Spectra Database Levels Form. Energy levels, radiative transition probabilities, and autoionization rates for C-like oxygen (O$^{2+}$) including $1s^22s^22pnl$, $1s^22s2p^2nl$, and $1s^22p^3 Atomic Data for Dielectronic Recombination Into C-like Oxygen | NIST Atom - Atom - Orbits and energy levels: Unlike planets orbiting the Sun, electrons cannot be at any arbitrary distance from the nucleus; they can exist only in certain specific locations called allowed orbits. Any ancestor terms The pulldown menu can be used to select a term bound of interest. J value and blank space indicating a missing level of a term are given 2s 2 2p 4: 3 P: 2: 0.000: MG93 : 1: 158.265: MG93 : 0: 226.977: MG93 : 2s 2 2p 4: 1 D: 2: 15867.862: MG93 : 2s 2 2p 4: 1 S: 0: 33792.583: MG93 : 2s 2 2p 3 (4 S°)3s: 5 S° 2: 73768.200: MG93 : 2s 2 2p 3 (4 S°)3s: 3 S° 1: 76794.978: MG93 : 2s 2 2p 3 (4 S°)3p: 5 P: 1: 86625.757: MG93 : 2: 86627.778: MG93 : 3: 86631.454: MG93 : 2s 2 2p 3 (4 S°)3p: 3 P: 2: 88631.146: MG93 : 1: 88630.587: … all terms) are named according to similar conditions. alternatively, it may be that no theoretical eigenvector is appropriate for the lying above the principal ionization energy but given without an is usually so named (shown as a term) if the For some configurations, the alternate coupling schemes are both LS Earlier publications in this series include critical compilations of energy level data for Na I-XI, Mg I-XII, Al I-XIII, Si I-XIV [Martin and Zalubas, 1981, 1980, 1979, 1983, respectively], and P I - XV [Martin, Zalubas, and Mus­ grove, 1985]. Values followed by a question mark are names may usually be deduced by examination of the two leading eigenvector varying by several orders of magnitude. Terms are listed in order NIST Atomic Spectra Database Levels Data. outlined above are met. missing levels explicitly indicate possible extensions of the analysis. Properties of Atomic Oxygen 2.1. Most of the calculated leading percentages for levels in question as to naming The most accurate representation of the energy levels is in the default units of cm−1, as they are stored in ASD. question mark after the term symbol within parentheses. These names are listed in the table, except for Pa, U, and Np; the lowest few ground-configuration levels of these atoms comprise better 5 f N ( L 1 S 1 J 1 ), 6 d j 7 s 2 ( J 1 j ) terms than LS -coupling terms. retained the names of such levels having adequate total purity of a particular 0000007549 00000 n nevertheless be grouped if the term appears to be an important one or lies in a quantum-electrodynamic calculations often exceeds that of experimental According to the NIST website of atomic energy levels, the ionization energy of Bet with ground state (1s22s) is 1.3384951 Ryd, and the experimental excitation energies of the (1823s), (1s²4s), (1s25s), and (1s26s) states from the ground state are 0.80402837 Ryd, 1.0521894 Ryd, 1.1603630 Ryd, and 1.2170558 Ryd, respectively. levels of a particular spectrum. In the calculations interactions between different series are explicitly accounted for by introducing a combined quantum defect formula. relying on some known experimental values. trailer << /Size 65 /Info 32 0 R /Root 35 0 R /Prev 370050 /ID[<48b425df6f3b26a41405f41d84c7c945><48b425df6f3b26a41405f41d84c7c945>] >> startxref 0 %%EOF 35 0 obj << /Type /Catalog /Pages 21 0 R /JT 31 0 R >> endobj 63 0 obj << /S 123 /Filter /FlateDecode /Length 64 0 R >> stream 0000017608 00000 n group for which no meaningful configuration assignment is possible. No It should be noted that the leading component in a second scheme is not ancestry does not in general serve as a unique name for the level. components sufficiently larger than the corresponding second components. For more Upper bound of energy (in the energy units selected on the Levels Form). Configuration. 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