19-K - 40

 19-K - 40 FUJI E.C.  EVAL-MAY87 H.NAKAMURA                       
                      DIST-SEP89 REV2-FEB94                       
----JENDL-3.2         MATERIAL 1928                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
HISTORY                                                           
87-05  NEWLY EVALUATED BY H.NAKAMURA (FUJI ELECTRIC CO. LTD.)     
94-02  JENDL-3.2                                                  
       TOTAL CROSS SECTION WAS CALCULATED BY T. WATANABE (KHI).   
       INELASTIC SCATTERING CROSS SECTIONS WERE CALCULATED BY     
       K.SHIBATA (JAERI).                                         
       DATA WERE COMPILED BY K.SHIBATA.                           
*****  MODIFIED PARTS FOR JENDL-3.2 ****************************  
(3,1),(3,4),(3,51-91),(3,251),(4,2),(4,51-55)                     
              NEW OPTICAL AND STATISTICAL MODEL CAL.              
(3,2)         TOTAL - NONELASTIC                                  
****************************************************************  
                                                                  
MF=1  GENERAL INFORMATION                                         
     MT=451  DESCRIPTIVE DATA AND DICTIONARY                      
                                                                  
MF=2 MT=151  RESONANCE PARAMETERS: (NOT GIVEN )                   
                                                                  
MF=3  NEUTRON CROSS SECTIONS                                      
  BELOW 30 KEV                                                    
        ASSUMED OR INTERPOLATED CROSS SECTIONS,GUIDED BY          
      THOSE OF K-39:                                              
                (10**-5) (2200M/S)   (5.10**2)  (3.10**4)  RES.INT
       MT=2       2.75B    2.75 B      2.75  B    2.75  B    -    
       MT=102  1509.0 B   30.0  B /1/  0.2   B    0.023 B  13.45 B
       MT=103   370.0 B    4.4  B /1/  0.012 B    0.012 B    -    
       MT=107     2.2 B    0.39 B /1/  0.04  B    0.015 B    -    
       MT=1    1884.0 B   37.54 B      3.016 B    2.8   B    -    
  30 KEV - 1.0 MEV                                                
     MT=1,2,4,102 : CALCULATED WITH CASTHY CODE /2/.              
     MT=103 : 0.012 B, GUIDED BY MEASUREMENTS OF H.WEIGMANN/3/.   
  ABOVE 30 KEV.                                                   
     MT=1,2,4,51-91,102                                           
        TOTAL, ELASTIC, INELASTIC AND CAPTURE CALCULATION WITH    
      CASTHY CODE /2/, CONSIDERING THE COMPETITION WITH THE       
      THE THRESHOLD REACTION CHANNELS.                            
        OPTICAL POTENTIAL PARAMETERS OF C.Y.FU/3/ ARE USED.       
      THE SPHERICAL OPTICAL POTENTIAL PARAMETERS :                
            V = 46.72      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 4.2 MB AT 200 KEV.  
        THE DISCRETE LEVEL SCHEME TAKEN FROM REF. /4/ :           
             NO.     ENERGY(MEV)     SPIN-PARITY                  
            (G.S.)     0.0             4   -                      
              1        0.0296          3   -                      
              2        0.800           2   -                      
              3        0.892           5   -                      
              4        1.644           0   +                      
              5        1.959           2   +                      
      CONTINUUM LEVELS ASSUMED ABOVE 2.1 MEV. THE LEVEL           
      DENSITY PARAMETERS OF ASANO ET AL./5/ ARE USED.             
    ***** JENDL-3.2 ********************************************  
    THE TOTAL AND INELASTIC SCATTERING CROSS SECTIONS WERE CAL-   
    CULATED BY USING THE OMP SET DETERMINED BY T. WATANABE.       
           V = 54.36 - 0.325EN   (MEV)                            
           WS= 2.258 + 0.1698EN  (MEV)                            
           VSO=3.341             (MEV)                            
           R  =1.20  ,A  =0.658  (FM)                             
           RS =1.32  ,B  =0.602  (FM)                             
           RSO=1.10  ,ASO=0.406  (FM)                             
    THE CROSS SECTIONS OF MT=16,22,28,103,107 IN JENDL-3.1 WERE   
    CONSIDERED AS THE COMPETING PROCESS FOR THE STATISTICAL MODEL 
    CALCULATION.                                                  
    ************************************************************  
     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 /6/, WITHOUT THE PRECOMPOUND REACTION CORRECTION.      
      TRANSMISSION COEFFICIENTS FOR PROTON AND ALPHA PARTICLE     
      ARE CALCULATED BY USING THE OMP OF BECCHETTI-GEENLEES       
      /7/ AND HUIZENGA-IGO/8/, 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=51-55  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) IGARASI, S.: J. NUCL. SCI. TECH., 12, 67 (1975).              
 3) WEIGMANN, H.: NESTOR DATA.                                    
 4) FU, C.Y.: ATOM. DATA AND NUCL. DATA TABLES., 17, 127 (1976).  
 5) LEDERER, 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).