
       Procedure for building the database (version 4.3)
       -------------------------------------------------
Full database recomputed with new ENSDF data and nuclear wallet cards from Feb2015

1. Info on specific decays are taken first from ENSDF file. If a decay channel
     is not properly described in the ENSDF files, then the information given
     in the nuclear wallet cards are considered.
2. All Q Values are not taken as given by QCalc and no longer read in the ENSDF
     file.
3. Several tests were performed on the database:
     Test to detect, and improve or remove decay channel without branching
       ratio in the database
     Test to detect and remove duplicate lines in the database
     Test to check if the energy levels of the nuclei in the database are 
       consistent with ENSDFSTATE
     Test to detect and remove if necessary excited levels with negative values 
     Test to check if some files are missing compared to the former database
     For some typical radioactive decays (Co60,Sr90,Ra226,..) the spectra of 
       gamma, and alphas are directly computed with a program outside of Geant4
       and compared with nudat2 output. The spectra computed with Geant4
       rdecay02 are also added for comparison. 
4. Some files were corrected or improved manually.  See description below.
                

Files changed by Hand
--------------------
z66.a142 - some info in ENSDF, but not complete.  Here we neglect the info from 
   ENSDF and consider only the wallet cards.
   Modeled as a beta+ decay to ground.

z84.a203 - correct the decay of the 641.98 excited state

z75.a196 - changed -1000 excited state in zero state to be consistent with ENSDF
           levels and ENDSFSTATE database

z4.8 - added alpha decays from excited states 3030 and 16626 

z71.a151 - removed IT decay from 78 keV level and set p decay at 100% according
           to info in ENSDF file 150YB

z71.a150 - removed IT decay from 22 keV level and set p decay at 100% according
           to info in ENSDF file 150YB

z90.a234 (Th234) - added the +X value of 4.e-6 keV to the excited levels
 
Remove files: z62.a164, z63.a166, z97.a239 which had negative excited levels
                and 0 T1/2 
              z74.a157 with negative excited levels - no levels given at all in
                ENSDF
              z80.210 Remove negative parent level

Correct files z81.a213 and replace negative parent level by ground state and 
  correct T1/2 according to ENSDFSTATE

Copied some files from version 4.2 with BetaPlus2 and BetaMinus2 decay added by
  Dennis Wright: z54.124, z24.a50, z48.a116, z52.a130, z54.a134, z54a136, z56.a132,
                 z58.a136, z58.a138, z60.a150, z74.a180

Copied some part of files from version 4.2 with BetaPlus2 and BetaMinus2 file 
  added by Dennis Wright: z30.a70,z40.a96


