VI/74                  Atomic Energy Level Data (NIST 1993)
Selected Tables of Atomic Spectra (O II)
   Martin W.C., Kaufman V.
   <J. Phys. Chem. Ref. Data, 22, 1179 (1993)>
Energy Levels of Sodium, Na I through Na XI
   Martin W.C., Zalubas R.
   <J. Phys. Chem. Ref. Data, Vol. 10, 195 (1981)>
Energy  Levels of Magnesium Mg I through Mg XII
   Martin W.C., Zalubas R.
   <J. Phys. Chem. Ref. Data, Vol. 9, 1 (1980)>
Energy Levels of Aluminum Al I through Al XIII
   Martin W.C., Zalubas R. (1979)
   <J. Phys. Chem. Ref. Data, Vol. 8, 817 (1979)>
Energy Levels of Silicon Si I through Si XIV
   Martin W.C., Zalubas R.
   <J. Phys. Chem. Ref. Data, Vol. 12, 323 (1983)>
Energy Levels of Phosphorus P I through P XV
   Martin W.C., Zalubas R., Musgrove A.
   <J. Phys. Chem. Ref. Data, Vol. 14, 751 (1985)>
Energy Levels of Sulfur, S I through S XVI
   Martin W.C., Zalubas R., Musgrove A.
   <J. Phys. Chem. Ref. Data, Vol. 19, 821 (1990)>
Atomic Energy Levels of the Iron Period Elements: Potassium through Nickel
   Sugar J., Corliss C.
   <J. Phys. Chem. Ref. Data, Vol. 14, Suppl. No. 2 (1985)>
Energy Levels of Copper, Cu I through Cu XXIX
   Sugar J., Musgrove, A.
   <J. Phys. Chem. Ref. Data, Vol. 19, 527 (1990)>
Energy Levels of Krypton, Kr I through Kr XXXVI
   Sugar J., Musgrove, A.
   <J. Phys. Chem. Ref. Data, Vol. 20, 859 (1991)>
Energy Levels of Molybdenum, Mo I through Mo XLII
   Sugar J., Musgrove, A.
   <J. Phys. Chem. Ref. Data, Vol. 17, 155 (1988)>
Atomic Energy Levels - The Rare Earth Elements
   Martin W.C., Zalubas R., Hagan L.
   <Natl. Stand. Ref. Data Ser., Natl. Bur. Stand.(U.S.) 60 (1978)>
ADC_Keywords: Atomic physics - 150
Keywords: NIST, Atomic Energy Level Data
Abstract:
  This data set is a critical compilation of data on atomic energy
  levels for atoms and ions. For a number of the ions the levels have
  been derived or recalculated. In addition to the level value in cm-1
  and the parity, the J value and the configuration and term assignments
  are listed if known. Leading percentages from the calculated
  eigenvectors are tabulated wherever available.
File Summary:
--------------------------------------------------------------------------------
  FileName      Lrecl  Records   Explanations
--------------------------------------------------------------------------------
ReadMe             80        .   This file
levels.dat        267    47334  *Atomic Energy Level Data
--------------------------------------------------------------------------------
Note to levels.dat:
  Included in the table are data for the following elements (ions):
  -------------------------------------------------------------
                                     Fe-period: K-Ni
  OII    8  Oxygen, once ionized.     K     19  Potassium
  Na    11  Sodium                    Ca    20  Calcium
  Mg    12  Magnesium                 Sc    21  Scandium
  Al    13  Aluminium                 Ti    22  Titanium
  Si    14  Silicon                   V     23  Vanadium
  P     15  Phosphorus                Cr    24  Chromium
  S     16  Sulphur                   Mn    25  Manganese
                                      Fe    26  Iron
  rare earths (La-Lu)                 Co    27  Cobalt
                                      Ni    28  Nickel
  La    57  Lanthanium                Cu    29  Copper
  Ce    58  Cerium                    Kr    36  Krypton
  Pr    59  Preaseodymium             Mo    42  Molybdenum
  Nd    60  Neodymium
  Pm    61  Promethium
  Sm    62  Samarium
  Eu    63  Europeum
  Gd    64  Gadolinium
  Tb    65  Terbium
  Dy    66  Dysprosium
  Ho    67  Holmium
  Er    68  Erbium
  Tm    69  Thulium
  Yb    70  Ytterbium
  Lu    71  Lutetium
  -------------------------------------------------------------
Byte-by-byte Description of file: levels.dat
--------------------------------------------------------------------------------
   Bytes Format  Units   Label    Explanations
--------------------------------------------------------------------------------
   1-  2  A2     ---     Element  Atomic element symbol
   4-  5  I2     ---     Ion      *! Stage of Ionization
   7- 55  A49    ---     Mconf    Main Configuration
  57- 86  A30    ---     Mterm    Main Term
  88- 99  A12    ---     J        j value
     101  A1     ---     P       *[@] Parity
     103  A1     ---     Pre_E   *[[] Level Prefix
 104-117  F14.4  cm-1    E        ?Energy Level
 118-120  A3     ---     Suf_E   *Level Suffix
     122  A1     ---     Pre_g   *prefix to Lande g factor
 123-133  F11.6  ---     g        ?Lande g factor
     134  A1     ---     Suf_g   *suffix to Lande g factor
 136-138  I3     ---     Perc1    ?first leading percentage (eigenvector)
 140-188  A49    ---     Conf1    Configuration 1
 190-199  A10    ---     Term1    Term 1
 201-203  I3     ---     Perc2    ?second leading percentage
 205-253  A49    ---     Conf2    Configuration 2
 255-264  A10    ---     Term     Term 2
 266-267  A2     ---     Code    *Percentage Code
--------------------------------------------------------------------------------
Note to Ion:
  Stage of ionization or spectrum number. The spectrum numbers are "1"
  for Roman I (neutral atom), etc.
Note on P:
  '@'   = odd  (italics in the publication)
  blank = even
Note on Pre_E:
  "[" = calculated value
Note on Suf_E:
  "]" = calculated value
  "?" = questionable
  "*" = questionable
  "+x"= uncertainty
Note on Pre_g, Suf_g:
  See the printed documentation for details
Note to Code:
  Percentage code (used to identify "Limit" records and "series" records and
                   to typeset leading percentages)
  N=print the first percent
  Q=print percent1, percent2,configuration2, term2
  T=print everything
--------------------------------------------------------------------------------
  There are seventeen fields for each level record.  Each field is in columnar
  format and is left-justified.
--------------------------------------------------------------------------------
Modifications made:
  Excessive blanks between the fields were removed. The fields with
  numeric values were right justified and prefix and suffix were
  removed to separate columns. The formats for these fields were
  changed accordingly.
(End)                                       N.P.M. Kuin [ADC/NSSDC]  20-Oct-1994