For an executable version in DOS, left-click on the file fitalle.exe . You will also need the graphics driver egavga.bgi from Borland. This can be downloaded by left-clicking on egavga.exe . After this is saved on the hard disk, you must rename it to egavga.bgi. Both fitalle.exe and egavga.bgi along with any data files must be in the same directory for fitalle.exe to work.
All source have the same geometry with respect to the detector.
They were placed at the center of one end of the 3 inch NaI detector. The activity is accurate to 4 percent. The Na22 data file na22.dat was taken using a Na22 source which was 1.16 microcuries on December 11, 1984. Data was recorded for 300 seconds on June 3, 1998. The Mn54 data file mn54.dat was taken using a Mn54 source which was 1.07 microcuries on April 5, 1991.