26-Fe- 58

 26-FE- 58 JNDC       EVAL-MAR87 S.IIJIMA,H.YAMAKOSHI             
                      DIST-SEP89 REV2-OCT93                       
----JENDL-3.2         MATERIAL 2637                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
HISTORY                                                           
87-03  EVALUATION WAS PERFORMED FOR JENDL-3.                      
87-05  COMPILED BY K.SHIBATA (JAERI).                             
93-10  JENDL-3.2.                                                 
       RE-EVALUATION WAS MADE BY                                  
         T.NAKAGAWA (NDC/JAERI): RESONANCE PARAMS, CROSS SECTIONS 
         S.IGARASI (NEDAC): GAMMA-RAY PRODUCTION DATA BELOW 10 KEV
       COMPILED BY T.NAKAGAWA                                     
                                                                  
     *****   MODIFIED PARTS FOR JENDL-3.2   ********************  
      (2,151)                                                     
      (3,1), (3,2), (3,4), (3,51-91), (3,102)                     
      (4,16-28), (4,91)    TAKEN FROM JENDL FUSION FILE           
      (12,102)                                                    
      (15,102)             BELOW 1 MEV                            
     ***********************************************************  
                                                                  
     -------------------------------------------------------------
      JENDL FUSION FILE /1/  (AS OF AUG. 1993)                    
          EVALUATED B.YU (CIAE) AND S.CHIBA (NDC/JAERI)           
          COMPILED BY B.YU.                                       
                                                                  
            ALL OF CROSS SECTIONS WERE TAKEN FROM JENDL-3.  MF=6  
        OF MT=16, 22, 28 AND 91 WERE CREATED WITH SINCROS-II /2/  
        AND F15TOB/1/ PROGRAM.  KALBACH'S SYSTEMATICS /3/ WAS     
        USED.  THE PRECOMPOUND/COMPOUND RATIO WAS TAKEN FROM THE  
        SINCROS-II CALCULATION.                                   
            OPTICAL-MODEL, LEVEL DENSITY AND OTHER PARAMETERS USED
        IN THE SINCROS-II CALCULATION ARE DESCRIBED IN REF./2/.   
        LEVEL SCHEMES WERE DETERMINED ON THE BASIS OF ENSDF/4/.   
     -------------------------------------------------------------
                                                                  
                                                                  
MF=1  GENERAL INFORMATION                                         
  MT=451  DESCRIPTIVE DATA AND DICTIONARY                         
                                                                  
MF=2  RESONANCE PARAMETERS                                        
  MT=151 RESOLVED RESONANCES                                      
      RESONANCE REGION = 1.0E-5 EV TO 350.0 KEV                   
      THE MULTILEVEL BREIT-WIGNER FORMULA WAS USED.  PARAMETERS   
      WERE DETERMINED ON THE BASIS OF DATA BY GARG ET AL./5/,     
      KAEPPELER ET AL./6/, ALLEN AND MACKLIN/7/.                  
                                                                  
      CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS.      
                      2200-M/S     RES. INTEG.                    
         ELASTIC       6.470 B         -                          
         CAPTURE       1.300 B        1.36 B                      
         TOTAL         7.770 B         -                          
                                                                  
MF=3  NEUTRON CROSS SECTIONS                                      
  BELOW 350 KEV, NO BACKGROUND CROSS SECTIONS WERE GIVEN.         
  ABOVE 350 KEV, THE DATA WERE EVALUATED AS FOLLOWS.              
                                                                  
  MT=1,4,51-62,91,102  TOTAL, INELASTIC AND CAPTURE               
      CALCULATED WITH OPTICAL AND STATISTICAL MODEL CODE CASTHY   
      /8/.  OPTICAL POTENTIAL PARAMETERS/9/ ARE AS FOLLOWS:       
         V  = 46.0-0.25*EN (MEV),                                 
         WS = 14.0-0.2*EN  (MEV),  (IN THE GAUSSIAN FORM)         
         WI = 0.125*E-0.0004*E**2 (MEV),                          
         VSO= 6.0          (MEV),                                 
         R  = 1.286 (FM), A0 = 0.62  (FM)                         
         RS = 1.387 (FM), AS = 0.7   (FM)                         
         RSO= 1.07  (FM), ASO= 0.62  (FM)                         
                                                                  
     THE LEVEL SCHEME USED IS:                                    
          NO.     ENERGY(MEV)  SPIN-PARITY                        
         G.S.      0.0          0 +                               
          1.       0.8108       2 +                               
          2.       1.6747       2 +                               
          3.       2.0765       4 +                               
          4.       2.1339       3 +                               
          5.       2.2581       0 +                               
          6.       2.6004       4 +                               
          7.       2.7819       1 +                               
          8.       2.8764       2 +                               
          9.       3.0840       2 +                               
         10.       3.1330       4 +                               
         11.       3.2330       2 +                               
         12.       3.2440       0 +                               
       LEVELS ABOVE 3.389 MEV WERE ASSUMED TO BE OVERLAPPING.     
       THE CAPTURE CROSS SECTION WAS NORMALIZED TO 3 MB AT 500    
       KEV/10/.  DIRECT CAPTURE CROSS SECTION WAS CALCULATED      
       WITH A SIMPLE FORMULA DERIVED BY BENZI AND REFFO/11/ AND   
       ADDED TO THE CASTHY CALCULATION.                           
  MT=2   ELASTIC                                                  
      TOTAL CROSS SECTION - SUM OF PARTIAL CROSS SECTIONS         
  MT=16,22,28,103,107 (N,2N),(N,N'A),(N,N'P),(N,P),(N,A)          
      CALCULATED WITH GNASH /12/.                                 
  MT=251  MU-BAR                                                  
      CALCULATED WITH CASTHY /8/.                                 
                                                                  
MF=4  ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS                 
  MT=2,51-62                                                      
      CASTHY CALCULATION                                          
  MT=16,22,28,91                                                  
      APPROXIMATELY TRANSLATED FROM THE DATA IN MF=6 OF JENDL     
      FUSION FILE.                                                
                                                                  
MF=5  ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS                  
  MT=16,22,28,91                                                  
      CALCULATED WITH GNASH.                                      
                                                                  
MF=12 PHOTON MULTIPLICITIES AND TRASITION PROBABILITIES           
  MT=16,22,28,91,103,107                                          
      MULTIPLICITIES WERE CALCULATED WITH GNASH.                  
  MT=51-62                                                        
      TRANSITION PROBABILITIES WERE GIVEN.                        
  MT=102                                                          
      MULTIPLICITIES WERE CALCULATED FROM ENERGY BALANCE.         
                                                                  
MF=14 PHOTON ANGULAR DISTRIBUTIONS                                
  MT=16,22,28,51-62,91,102,103,107                                
      ASSUMED TO BE ISOTROPIC.                                    
                                                                  
MF=15 PHOTON ENERGY DISTRIBUTIONS                                 
  MT=16,22,28,91,103,107                                          
      CALCULATED WITH GNASH.                                      
  MT=102                                                          
      BELOW 10 KEV, CALCULATED WITH CASTHY/8/. ABOVE 1 MEV, GNASH 
      CALCULATION WAS ADOPTED.                                    
                                                                  
REFERENCES                                                        
 1) CHIBA S. ET AL.: JAERI-M 92-027, P.35 (1992).                 
 2) YAMAMURO N.: JAERI-M 90-006 (1990).                           
 3) KALBACH C.: PHYS. REV., C37, 2350 (1988).                     
 4) ENSDF: EVALUATED NUCLEAR STRUCTURE DATA FILE, BNL/NNDC.       
 5) GARG J.B. ET AL.: PHYS. REV., C18, 1141 (1978).               
 6) KAEPPELER F. ET AL.: NUCL. SCI. ENG., 84, 234 (1983).         
 7) ALLEN B.J. AND MACKLIN R.L.: J. PHYS. G., 6, 381 (1980).      
 8) IGARASI S. AND FUKAHORI T.: JAERI 1321 (1991).                
 9) YAMAKOSHI H.: JAERI 1261, P.30 (1979).                        
10) TROFIMOV JU.N.: ATOMNAJA ENERGIJA, 58, 278 (1985).            
11) BENZI V. AND REFFO G.: CCDN/NW/10 (1969).                     
12) YOUNG P.G. AND ARTHUR E.D.: LA-6974 (1977).