This is a complete example of the "gnxas" data analysis on high 
quality spectra of the Br_2 molecule in the gas phase. 

The 4 subdirectories contain 
dat  experimental data LURE D42 1992
pha  phase-shift input file and calculation  (program phagen)
xas  signal calculation gamma2,X2,X4,X6 (program gnxas)
fit  fitting and statistical analysis (program fitheo) 

The data have been published in ref. [1] and additional details 
on the data analysis procedures can be found in ref. [2].

1) P. D' Angelo, A. Di Cicco, A. Filipponi, and N. V. Pavel, 
{\sl ``Double electron excitation channels at the Br K-edge of 
HBr and Br$_2$.''}, Phys. Rev. A {\bf 47}, 2055 (1993). 

2) A. Filipponi and P. D' Angelo, 
{\sl``Accurate determination of molecular structures 
by x-ray absorption spectroscopy.''}, 
J. Chem. Phys. {\bf 109}, 5356 (1998). 

WARNING
The output refers to the results obtained using a Linux operating 
system. This example should run also on other operating systems, 
but, slightly different numerical results may be obtained due to the 
different FORTRAN compilers and/or hardware characteristics, 
especially in the case of the fitheo program. 






