Rachel yield data files

Rachel can read relative-efficiency-correted gamma-ray yield data to pass to Gosia from Radware AGS ascii level scheme files (one file per gamma-ray detector), or from human-readable Rachel format yield files (also one file per gamma-ray detector).

The file format is most easily understood using an example:

<pre>
gsb                  1.5   gsb                  0.5   149102        4859           
gsb                  2.5   gsb                  0.5   621142        5154           
gsb                  2.5   gsb                  1.5   556882        9347            
gsb                  3.5   gsb                  1.5   113347        2201           
gsb                  3.5   gsb                  2.5   399733        2519            
a                    2.5   gsb                  0.5   152239        7870             
a                    2.5   gsb                  1.5   407056        1518           
a                    3.5   gsb                  1.5   87974         6091              
a                    3.5   gsb                  2.5   134820        7628            
a                    3.5   a                    2.5   1654.5       140.0  # Real or integer values are acceptable     
</pre>

In the example above, there are two bands in the level scheme: "gsb" and "a".  The transition is defined by band names and spins of the initial and final states.  The yield appears as the last two fields, on an arbitrary scale.

The format is the following:

<pre>
initial_band_name   initial_spin  final_band_name  final_spin  measured_yield  error
</pre>

Note the following requirements for Rachel gamma-ray yield data (in any file format):

When using Rachel, all data must be efficiency-corrected for the 'relative' efficiency of the individual germanium detector (or cluster).

To avoid systematic errors, see also the [[Normalization_of_yield_data | requirements for normalization]] of gamma-ray yield data for Gosia, which also apply to Rachel.