ENDF/B-VI, Release 4
                             --------------------
        The tenth distribution of the ENDF/B-VI data tapes was released in 
   December 1996. That distribution included 5 new evaluation plus minor
   updates for 10 other evaluation in the neutron sublibrary, and minor 
   updates to 4 evaluations in the High Energy Incident Proton data 
   sublibrary.
        These updates have now been received at the NEA and the two relevant
   sublibraries have been modified. The names of these files have been changed
   to include the string "REL4" in order to clearly distinguish which files
   have change since ENDF/B-VI Release 3. All other sublibraries remain 
   unchanged from Release 3.
    Listed below are the materials for which modifications have been made
   in Release 4 and the tapes which now include them:
 Neutron sublibrary :   ENDFB6-REL4-G.ASC
 ----------------------------------------
 
 MAT #   Mod   Material                 Contents
  0128    3     H-2       File 6 update.
  1325    2     Al-27     File 1, 3 updated.
  3925    2     Y-89      File 1, 5 updated.
  4825    4     Cd-106    File 1 comments added.
  4831    4     Cd-108    File 1 comments added.
  4837    4     Cd-110    File 1 comments added.
  4843    4     Cd-112    File 1 comments added.
  4849    4     Cd-114    File 1 comments added; scattering radius changed.
  4855    4     Cd-116    File 1 comments added.
  6425    1     Gd-152    New evaluation.
  6431    1     Gd-154    New evaluation.
  7725    1     Ir-191    New evaluation.
  7731    1     Ir-193    New evaluation.
  9228    5     U-235     File 1 comments updated, prompt nubar updated.
  9428    1     Pu-236    New evaluation.


 High Energy sublibrary - incident proton data :   ENDFHE6-REL4-C.ASC
 --------------------------------------------------------------------
 MAT #   Mod   Material                 Contents
   625    2     C-12      File 1 comments updated.
  2631    2     Fe-56     File 1 comments updated.
  8237    2     Pb-209    File 1 comments updated.
  8325    2     Bi-209    File 1 comments updated.


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 The following tapes are unchanged from rel.3 or earlier, but are included here for convenience.
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 Charged particle sublibrary :    ENDFB6-C.ASC

 Activation sublibrary :     ENDFB6-I.ASC
 
 Dosimetry sublibrary :     ENDFB6-D.ASC
 
 Photon sublibrary :      ENDFB6-P.ASC
 
 Radioactive decay data sublibrary :      ENDFB6-R.ASC
 
 High energy incident neutron sublibrary :      ENDFHE6-G.ASC

 High energy incident charged particle sublibrary :        ENDFHE6-C.ASC

 Fission product yield sublibrary :      ENDFB6-Y.asc
 
 Thermal scattering sublibrary :       ENDFB6-B.asc

 High energy incident neutron sublibrary :      endfhe6-g.asc