Rachel format nuclear data files
From GOSIA
(Added example of time-reversal for consistent phase convention) |
(Added an updated example and clarifying remarks) |
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...</pre> | ...</pre> | ||
| - | where "branching," "mixing," "lifetime" and the bra and ket notation are fixed formatting symbols and ''band'' is a valid text band name | + | where "branching," "mixing," "lifetime" and the bra and ket notation are fixed formatting symbols and ''band'' is a valid text band name in Rachel. The "<", ">" and "||" symbols should be delimited by spaces. Note the "upward" direction for the matrix element (from lower- to higher-numbered state) and the standard units of the appropriate powers of e, b and nuclear magnetons. The individual entries can be given in any order, for example in the file <pre>rachel_nuclear_data.txt.EXAMPLE</pre>, which comes with the Rachel distribution: |
<pre> | <pre> | ||
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< gsb 2.0 || E2 || gsb 0.0 > = 2.17 0.02 # Sign is interpreted as positive [eb] | < gsb 2.0 || E2 || gsb 0.0 > = 2.17 0.02 # Sign is interpreted as positive [eb] | ||
mixing gam 2.0 gsb 2.0 0.35 0.05 # any user comment | mixing gam 2.0 gsb 2.0 0.35 0.05 # any user comment | ||
| - | < gamod | + | < gamod 3.0 || E2 || gsb 4.0 > = -0.45 0.12 # Sign is interpreted as negative |
< gsb 2.0 || E2 || gamod 3.0 > = 0.23 0.08 # BACKWARD--WILL BE TIME-REVERSED! | < gsb 2.0 || E2 || gamod 3.0 > = 0.23 0.08 # BACKWARD--WILL BE TIME-REVERSED! | ||
# Note that time-reversal is done automatically for a consistent phase convention. | # Note that time-reversal is done automatically for a consistent phase convention. | ||
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</pre> | </pre> | ||
| - | The order of the individual lines is completely arbitrary. For example, see the example file [[File:Rachelnucleardata.txt]], which should be renamed as above so that rachel.py will find it in the working directory. The file is re-read each time Gosia is called, so individual lines can be "commented out" before a Gosia fit iteration. | + | The order of the individual lines is completely arbitrary. For example, see the example file [[File:Rachelnucleardata.txt]], which should be renamed as above so that rachel.py will find it in the working directory. The file is re-read each time Gosia is called, so individual lines can be "commented out" before a Gosia fit iteration. Note that the sixth line contains a matrix element given in the ''decay direction'', whereas Gosia requires it to be in the ''excitation direction''--from lower-numbered state to higher-numbered state. This phase of this matrix element will be automatically time-reversed before being included in the fit data. |
The weights given to each of these four data sets can be set via the ''Gosia controls'' button menu, for example to test whether there are systematic conflicts between the different data sets (and/or the gamma-ray yield data). | The weights given to each of these four data sets can be set via the ''Gosia controls'' button menu, for example to test whether there are systematic conflicts between the different data sets (and/or the gamma-ray yield data). | ||
