Rachel format nuclear data files

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(Added an updated example and clarifying remarks)
(cleaned up formatting and updated file name of example file)
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Rachel accepts the standard Gosia data in addition to the measured relative gamma-ray yield data, in the file <tt>rachel_nuclear_data.txt</tt>.
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Rachel accepts the standard Gosia data  
* Excited states' lifetimes
* Excited states' lifetimes
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* Measured branching ratios (not including internal conversion branches)
* Measured branching ratios (not including internal conversion branches)
* Measured E2/M1 mixing ratios   
* Measured E2/M1 mixing ratios   
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in addition to the measured relative gamma-ray yield data in the file <tt>rachel_nuclear_data.txt</tt>, which must be in the working directory in order for Rachel to find it.
The Rachel file format differs from the standard Gosia input for these data and is "human readable":
The Rachel file format differs from the standard Gosia input for these data and is "human readable":
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...</pre>
...</pre>
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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:
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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 <tt>rachel_nuclear_data.txt.EXAMPLE</tt>, which comes with the Rachel distribution:
<pre>
<pre>
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</pre>
</pre>
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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.
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The order of the individual lines is completely arbitrary.  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).

Revision as of 18:09, 8 March 2011

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