15-P - 31

 15-P - 31 FUJI E.C.  EVAL-MAY87 H.NAKAMURA                       
                      DIST-SEP89 REV2-DEC93                       
----JENDL-3.2         MATERIAL 1525                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
HISTORY                                                           
87-05  NEWLY EVALUATED BY H.NAKAMURA (FUJI ELECTRIC CO.LTD)       
93-12  JENDL-3.2                                                  
       TOTAL CROSS SECTION WAS RECALCULATED BY T.WATANABE. (KHI)  
       GAMMA-RAY PRODUCTION CROSS SECTIONS WERE EVALUATED BY      
       T. ASAMI (DE).                                             
*****  MODIFIED PARTS FOR JENDL-3.2 ******************************
(3,1)                 A NEW OMP SET WAS DETERMINED.               
(3,2)                 TOTAL - NONELASTIC                          
(3,107)               Q-VALUE CORRECTED                           
MF=12,13,14,15        NEWLY EVALUATED                             
******************************************************************
                                                                  
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 - 500 KEV     
           PARAMETERS ARE TAKEN FROM BNL 325 4TH EDITION/1/, AND  
           R.L.MACKLIN ET AL./2/.                                 
           CROSS SECTIONS CALCULATED WITH THESE PARAMETERS ARE TO 
           BE CORRECTED BY ADDING MF=3, MT=1,2AND 102 DATA.       
                                                                  
    CALCULATED 2200-M/S CROSS SECTIONS AND RESONANCE INTEGRALS    
                  2200-M/SEC    RES. INTEG.  REF.                 
      ELASTIC       3.134 B          -       /1/                  
      CAPTURE       0.166 B       0.081 B    /1/                  
      TOTAL         3.300 B          -                            
                                                                  
MF=3  NEUTRON CROSS  SECTIONS                                     
    BELOW 500 KEV                                                 
        BACKGROUND CROSS SECTION.                                 
        MT=1,2   0.07029 B                                        
        MT=251 MU-BAR=0.0217                                      
    ABOVE 500 KEV                                                 
        MT=1     NEW OPTICAL MODEL CALCULATION USING THE PARAMETER
                 SET DETERMINED BY T. WATANABE                    
                     V = 50.58 - 0.06476E (MEV)                   
                     WS = 6.583 + 0.5927E (MEV)                   
                     VSO= 3.391           (MEV)                   
                     R = 1.36,  A = 0.422(FM)                     
                     RS= 1.23,  B = 0.517(FM)                     
                     RSO=0.938, ASO=0.600(FM)                     
                                                                  
        MT=2         TOTAL - NONELASTIC                           
        MT=4,51-56,91,102 TOTAL, ELASTIC, INELASTIC AND CAPTURE   
        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 NESTOR DATA (MANY AUTHORS)                         
    MT=2 ELASTIC  -                                               
    MT=4 INELASTIC  -                                             
    THE SPHERICAL OPTICAL POTENTIAL PARAMETERS:                   
      V=43.0               VSO=5.37 (MEV)                         
      WS=9.13              WU =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 1.8 MB AT 500 KEV        
    BASED ON (7 MB AT 30 KEV) BY R.L.MACKLIN ET AL./5/.           
                                                                  
  THE DISCRETE LEVEL SCHEME TAKEN FROM  REF./6/:                  
      NO.       ENERGY (MEV)      SPIN-PARITY                     
    (G.S.)        0.0                1/2 -                        
       1          1.266              3/2 +                        
       2          2.234              5/2 +                        
       3          3.134              1/2 +                        
       4          3.295              5/2 +                        
       5          3.415              7/2 +                        
       6          3.506              3/2 +                        
                                                                  
       CONTINUUM LEVELS ASSUMED ABOVE 4.0 MEV. THE LEVEL          
       DENSITY PARAMETERS OF ASANO ET AL. /7/ ARE USED.           
                                                                  
   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 /8/, WITHOUT THE PRECOMPOUND REACTION CORRECTION.     
       TRANSMISSION COEFFICIENTS FOR PROTON AND ALPHA PARTICLE    
       ARE CALCULATED BY USING THE OMP OF BECCHETTI-GEENLEES      
       /9/ AND HUIZENGA-IGO/10/, RESPECTIVELY. IN THE CASES OF    
       MT=103 AND 107, THE EXPERIMENTAL DATA WERE ALSO            
       CONSIDERED TOGETHER WITH THE CALCULATIONS.                 
       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=51-56  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.                  
                                                                  
MF=12 PHOTON PRODUCTION MULTIPLICITY                              
   MT=102,103,107           CALCULATED BY SINCROS-II/11/.         
                                                                  
MF=13 PHOTON PRODUCTION CROSS SECTION                             
   MT=3                     CALCULATED BY SINCROS-II/11/.         
   MT=4                     DISCRETE LINES CALCULATED BY TAKING   
                            ACCOUNT OF BRANCHING RATIOS           
                                                                  
MF=14 PHOTON ANGULAR DISTRIBUTION                                 
   MT=3,4,102,103,107       ISOTROPIC                             
                                                                  
MF=15 PHOTON ENERGY DISTRIBUTION                                  
   MT=3,103,107         CALCULATED BY SINCROS-II/11/.             
   MT=102               CALCULATED BY CASTHY/3/.                  
                                                                  
REFERENCES                                                        
 1) MUGHABGHAB, S.F. ET AL.: NEUTRON CROSS SECTION, VOL.1 (1981). 
 2) MACKLIN, R.L. ET AL.: PHYS. REV. C32, 379 (1985).             
 3) IGARASI, S.: J. NUCL. SCI. TECH. 12, 67 (1975).               
 4) FU, C.Y.: ATOM. DATA AND NUCL. DATA TABLES. 17, 127 (1976).   
 5) MACKLIN, R.L. ET AL.: PHYS. REV. 129, 2695 (1963).            
 6) LEDERER, C.M. ET AL.: TABLE OF ISOTOPES. 7TH EDIT.            
 7) ASANO ET AL.: PRIVATE COMMUNICATION.                          
 8) YOUNG, P.G. AND ARTHUR, E.D.: LA-6947 (1977).                 
 9) BECCHETI, JR. AND GREENLESS, G.W.: POLARIZATION PHENOMENA     
    IN NUCLEAR REACTIONS, P.682 (1971).                           
10) HUIZENGA, JR. AND IGO, G.J.: NUCL. PHYS. 29, 462 (1962).      
11) YAMAMURO, N.: JAERI-M 90-006 (1990).