Assignment File Format

XTDS packages provides the possibility to fit hamiltonian parameters using experimental data. This necessitates an assignment file containing lines of the following form (the format must be respected):

.....................................................................................
  7466  870.614507 + 0.2150E+00    0.001000 10.0    13 F2   3  12 F1  15 SPVIEW_EXASG
  7467  870.620029 + 0.1490E+00    0.001000 10.0    13 E    2  12 E   11 SPVIEW_EXASG
  7468  870.625041 + 0.2430E+00    0.001000 10.0    13 F1   4  12 F2  16 SPVIEW_EXASG
  7469  870.644365 + 0.5500E-01    0.001000 10.0     9 A1   1  10 A2   2 SPVIEW_EXASG
  7470  870.669249   0.1660E+00    0.001000 10.0
  7471  870.674772   0.1150E+00    0.001000 10.0
  7472  870.679803   0.1930E+00    0.001000 10.0
  7473  870.784119   0.3700E-01    0.001000 10.0
  7474  870.985433   0.3100E-01    0.001000 10.0
  7475  871.024952   0.2200E-01    0.001000 10.0
  7476  871.038518   0.3900E-01    0.001000 10.0
  7477  871.065933   0.4200E-01    0.001000 10.0
  7478  871.246246   0.2300E-01    0.001000 10.0
  7479  871.341410   0.2300E-01    0.001000 10.0
  7480  871.426834   0.6400E-01    0.001000 10.0
  7481  871.485324   0.1240E+00    0.001000 10.0
  7482  871.716760   0.3600E-01    0.001000 10.0
  7483  871.891580 + 0.5300E-01    0.001000 10.0    24 F1   2  25 F2   5 SPVIEW_EXASG
  7483  871.891580 + 0.5300E-01    0.001000 10.0    24 F2   1  25 F1   6 SPVIEW_EXASG
  7484  871.924283   0.2400E-01    0.001000 10.0
  7485  871.955661 + 0.9300E-01    0.001000 10.0    23 F1   1  24 F2   6 SPVIEW_EXASG
  7485  871.955661 + 0.9300E-01    0.001000 10.0    23 F2   1  24 F1   6 SPVIEW_EXASG
.....................................................................................

Each line has the following structure:

Columns 1+6

Running index on experimental lines.

Columns 9+18

Experimental line wavenumber.

Column 20

The plus sign indicates that the line has been assigned and fitted in position. If any other character is placed here, this indicates that the line has been assigned but will not be fitted and will thus not be taken into account by the programs.

Columns 24+31

Experimental line intensity.

Column 33

The plus sign indicates that the line has been assigned and fitted in intensity. If any other character is placed here, this indicates that the line has been assigned but will not be fitted and will thus not be taken into account by the programs.

Columns 36+43

Experimental precision on line position.

Columns 45+48

Experimental precision on line intencity (percentage).

Columns 53+70

Assignment in the form \(J''C''n''\) (lower level) \(JCn\) (upper level). Each experimental line can be assigned to several theoretical transitions if necessary.

Columns 72+83

Character chain used to extract desired assignment lines.