16-S - 33

 16-S - 33 FUJI E.C.  EVAL-MAY87 H.NAKAMURA                       
                      DIST-SEP89 REV2-FEB94                       
----JENDL-3.2         MATERIAL 1628                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
HISTORY                                                           
87-05  NEWLY EVALUATED BY H.NAKAMURA (FUJI ELECTRIC CO. LTD.)     
94-02  JENDL-3.2                                                  
       NEW OPTICAL MODEL CALCULATION WAS PERFORMED BY T. WATANABE 
       (KHI).                                                     
       DATA WERE COMPILED BY K. SHIBATA (JAERI).                  
       *****  MODIFIED PARTS FOR JENDL-3.2 ******************     
       (3,1),(3,4),(3,51-57),(3,91),(3,251),(4,2),(4,51-57)       
               OPTICAL AND STATISTICAL MODEL CALCULATIONS.        
       (3,2)   TOTAL - NONELASTIC                                 
       *******************************************************    
                                                                  
 MF=1 GENERAL INFORMATION                                         
      MT=451  DESCRIPTIVE DATA AND DICTIONARY                     
                                                                  
 MF=2 MT=151  RESONANCE PARAMETERS:                               
      RESOLVED RESONANCES FOR MLBW FORMULA: 1.0E-5 EV - 260 KEV   
     PARAMETERS ARE TAKEN FROM BNL325 4TH EDITION/1/, AND         
     C.WAGEMANS AND H.WEIGMANN/2/.                                
      CROSS SECTIONS CALCULATED WITH THESE PARAMETERS ARE TO      
     BE CORRECTED ADDING MF=3, MT=1, 2 AND 102 DATA.              
                                                                  
     CALCULATED 2200-M/S CROSS SECTIONS AND RESONANCE INTEGRALS   
                                                                  
                  2200-M/SEC     RES. INTEG.       REF.           
       ELASTIC       2.84 B          -             /1/            
       CAPTURE       0.35 B        0.164 B         /1/            
       TOTAL         3.36 B          -              -             
                                                                  
 MF=3 NEUTRON CROSS SECTIONS                                      
    BELOW 260 KEV                                                 
      BACKGROUND CROSS SECTIONS ARE GIVEN FOR MT=1:               
      MT=1 0.171B : 0.002(N,P) + 0.169(N,A) B                     
      MT=103 (N,P) 0.0016 B, BASED ON 2200-M/S DATA /1/.          
      MT=107 (N,A) 0.169 B, SAME TO THE ABOVE.                    
      MT=251 MU-BAR = 0.0210                                      
    ABOVE 260 KEV.                                                
      MT=1,2,4,51-57,91,102                                       
          TOTAL, ELASTIC, INELASTIC AND CAPTURE CROSS SECTIONS    
         CALCULATED WITH CASTHY CODE /3/, CONSIDERING THE         
         COMPETITION WITH THE THRESHOLD REACTION CHANNELS.        
         OPTICAL POTENTIAL PARAMETERS OF C.Y.FU/4/ ARE ADJUSTED   
         TO REPRODUCE THE FOLLOWING EXPERIMENTAL DATA:            
             MT=1 TOTAL  -                                        
             MT=2 ELASTIC CROSS SECTIONS OF S-32.                 
             MT=4 INELASTIC   -                                   
          THE SPHERICAL OPTICAL POTENTIAL PARAMETERS :            
             V = 38.0     VSO= 5.37   (MEV)                       
             WS= 9.13     WV = 0.0    (MEV)                       
             R=RSO= 1.26  RS = 1.39   (FM)                        
             A=ASO= 0.76  B  = 0.40   (FM)                        
          MT=102 CAPTURE DATA ARE NORMALIZED TO 0.5 MB AT 260 KEV 
         BASED ON S-32 CAPTURE CROSS SECTIONS.                    
          THE DISCRETE LEVEL SCHEME TAKEN FROM REF./5/:           
             NO.      ENERGY(MEV)     SPIN-PARITY                 
            (G.S.)       0.0           3/2    +                   
              1          0.8404        1/2    +                   
              2          1.966         5/2    +                   
              3          2.313         3/2    +                   
              4          2.866         5/2    +                   
              5          2.934         7/2    -                   
              6          2.969         7/2    +                   
              7          3.220         3/2    -                   
          CONTINUUM LEVELS ARE ASSUMED ABOVE 3.6MEV. THE LEVEL    
         DENSITY PARAMETERS OF ASANO ET AL./6/ ARE USED.          
     *****  JENDL-3.2 ****************************************    
     MT=1,4,51-57,91,251                                          
       OPTICAL AND STATISTICAL MODEL CALCULATION                  
       WAS PERFORMED BY USING THE OMP SET GIVEN AS FOLLOWS:       
              V  = 58.83 - 0.5635EN     (MEV)                     
              WS = 3.609 + 0.1819EN     (MEV)                     
              VSO= 4.199                (MEV)                     
              R  = 1.306,  A  = 0.452    (FM)                     
              RS = 1.124,  B  = 0.690    (FM)                     
              RSO= 1.010,  ASO= 0.750    (FM).                    
     *********************************************************    
      MT=16(N,2N), 22(N,N'A),28(N,N'P),103(N,P),107(N,A)          
          BASED ON THE STATISTICAL MODEL CALCULATIONS WITH GNASH  
         CODE /7/, WITHOUT THE PRECOMPOUND REACTION CORRECTION.   
         TRANSMISSION COEFFICIENTS FOR PROTON AND ALPHA PARTICLES 
         ARE CALCULATED BY USING THE OMP OF BECCHETTI-GEENLEES/8/ 
         AND HUIZENGA-IGO/9/, RESPECTIVELY.                       
          LEVEL DENSITY PARAMETERS ARE BASED ON BUILT-IN VALUES.  
      MT=251 MU-BAR                                               
          CALCULATED WITH OPTICAL MODEL (CASTHY).                 
                                                                  
 MF=4  ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS                
      MT=2  CALCULATED WITH OPTICAL MODEL (CASTHY).               
      MT=51-57  CALCULATED WITH HAUSER-FESHBACH FORMULA (CASTHY)  
      MT=16,22,28  ISOTROPIC IN THE LABORATORY SYSTEM.            
      MT=91        ISOTROPIC DISTRIBUTIONS IN CM WERE CONVERTED   
                   TO THE DISTRIBUTIONS IN LAB.                   
                                                                  
 MF=5  ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS                 
      MT=16,22,28,91,103,107  EVAPORATION SPECTRA.                
                                                                  
REFERENCES                                                        
 1) MUGHABGHAB, S.F. ET AL.: NEUTRON CROSS SECTION, VOL.1 (1981). 
 2) WAGEMANS, C. AND WEIGMAN, H.: GRENOBLE-CONF., 462 (1981).     
 3) IGARASI, S.: J. NUCL. SCI. TECH., 12, 67 (1975).              
 4) FU, C.Y.: ATOM.DATA AND NUCL. DATA TABLES, 17, 127 (1976).    
 5) LEDRER, C.M. ET AL.: TABLE OF ISOTOPES. 7TH EDIT.             
 6) ASANO ET AL.: PRIVATE COMMUNICATION.                          
 7) YOUNG, P.G. AND ARTHUR, E.D.: LA-6947 (1977).                 
 8) BECCHETI, JR. AND GREENLEES, G.W.: POLARIZATION PHENOMENA     
   IN NUCLEAR REACTIONS, P.682 (1971).                            
 9) HUIZENGA, JR. AND IGO, G.J.: NUCL. PHYS., 29, 462 (1962).