88-Ra-223

 88-RA-223 TIT        EVAL-AUG88 N.TAKAGI                         
                      DIST-SEP89                                  
----JENDL-3.2         MATERIAL 8825                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
HISTORY                                                           
88-08 NEW EVALUATION WAS MADE BY N. TAKAGI (TOKYO INSTITUTE OF    
      TECHNOLOGY, TIT)                                            
                                                                  
MF=1  GENERAL INFORMATION                                         
  MT=451   COMMENT AND DICTIONARY                                 
  MT=452   NUMBER OF NEUTRONS PER FISSION                         
            EVALUATED WITH SEMI EMPIRICAL FORMULA OF HOWERTON/1/. 
                                                                  
MF=2  RESONANCE PARAMETERS                                        
  MT=151   RESONANCE PARAMETERS                                   
    NO RESONANCE PARAMETERS WERE GIVEN.                           
                                                                  
  2200-M/S CROSS SECTIONS AND RESONANCE INTEGRALS                 
                      2200 M/S VALUE       RES. INT.              
        TOTAL           143.10    B            -                  
        ELASTIC          12.40    B            -                  
        FISSION           0.70    B         1.06  B               
        CAPTURE         130.00    B         435   B               
                                                                  
MF=3  NEUTRON CROSS SECTIONS                                      
  MT=1  TOTAL CROSS SECTION                                       
        BELOW  4 EV, CALCULATED AS SUM OF MT'S = 2, 18 AND 102.   
        ABOVE  4 EV, OPTICAL MODEL CALCULATION WAS MADE WITH      
        CASTHY/2/.  THE POTENTIAL PARAMETERS/3/ USED ARE AS       
        FOLLOWS,                                                  
           V = 41.0 - 0.05*EN                      (MEV)          
           WS= 6.4 - 0.15*SQRT(EN)                 (MEV)          
           WV= 0             , VSO = 7.0           (MEV)          
           R = RSO = 1.31    , RS = 1.38            (FM)          
           A = ASO = 0.47    , B  = 0.47            (FM)          
                                                                  
  MT=2  ELASTIC SCATTERING CROSS SECTION                          
        BELOW 4 EV, THE CONSTANT CROSS SECTION OF 12.4 BARNS WAS  
        ASSUMED, WHICH WAS THE SHAPE ELASTIC SCATTERING CROSS     
        SECTION CALCULATED WITH OPTICAL MODEL.  ABOVE THIS ENERGY,
        OPTICAL MODEL CALCULATION WAS ADOPTED.                    
                                                                  
  MT=4,51-52,91  INELASTIC SCATTERING CROSS SECTIONS.             
        OPTICAL AND STATISTICAL MODEL CALCULATION WAS MADE WITH   
        CASTHY/2/.  THE LEVEL SCHEME WAS TAKEN FROM REF. 4.       
                   NO         ENERGY(KEV)   SPIN-PARITY           
                  G.S.             0.0         1/2 +              
                    1             50.19        3/2 -              
                    2             61.53        5/2 +              
                    3             79.77        3/2 -              
                    4            123.91        5/2 -              
                    5            130.27        7/2 +              
                    6            174.72        9/2 +              
                    7            174.78        7/2 -              
                    8            247.47        9/2 -              
                    9            280.31        3/2 +              
                   10            286.16        3/2 +              
                   11            329.95        3/2 -              
                   12            334.52        3/2 +              
                   13            342.50        3/2 +              
                   14            342.92        5/2 +              
        LEVELS ABOVE 369.43 KEV WERE ASSUMED TO BE OVERLAPPING.   
        THE LEVEL DENSITY PARAMETERS WERE TAKEN FROM REF. 5.      
                                                                  
  MT=16,17,37  (N,2N), (N,3N) AND (N,4N) REACTION CROSS SECTIONS  
        CALCULATED WITH EVAPORATION MODEL.                        
                                                                  
  MT=18  FISSION CROSS SECTION                                    
        MEASURED THERMAL CROSS SECTION OF 0.7 BARN WAS TAKEN FROM 
        REF. 6 , AND 1/V FORM WAS ASSUMED BELOW 4 EV.  ABOVE THIS 
        ENERGY, THE CONSTANT CROSS SECTION WAS ADOPTED.           
                                                                  
  MT=102  CAPTURE CROSS SECTION                                   
        MEASURED THERMAL CROSS SECTION OF 130 BARNS WAS TAKEN FROM
        REF. 6 , AND 1/V FORM WAS ASSUMED BELOW 4 EV.  ABOVE 4 EV,
        CALCULATED WITH CASTHY. THE GAMMA-RAY STRENGTH FUNCTION   
        WAS ESTIMATED FROM GAMMA-GAMMA = 0.040 EV AND LEVEL       
        SPACING = 8 EV.                                           
                                                                  
  MT=251  MU-L                                                    
        CALCULATED WITH CASTHY.                                   
                                                                  
MF=4  ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS                 
  MT=2,51-64,91       CALCULATED WITH OPTICAL MODEL.              
  MT=16,17,18,37      ISOTROPIC IN THE LAB SYSTEM.                
                                                                  
MF=5  ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS                  
  MT=16,17,37,91      EVAPORATION SPECTRA                         
         OBTAINED FROM LEVEL DENSITY PARAMETERS.                  
                                                                  
  MT=18               MAXWELLIAN FISSION SPECTRUM.                
        TEMPERATURE WAS ESTIMATED FROM Z**2/A DEPENDENCE/7/.      
                                                                  
REFERENCES                                                        
 1) HOWERTON R.J.: NUCL. SCI. ENG., 62, 438 (1977).               
 2) IGARASI S.: J.NUCL.SCI.TECHNOL.,12,67 (1975).                 
 3) OHSAWA T., OHTA M.: J. NUCL. SCI. TECHNOL., 18, 408 (1981).   
 4) MAPLES C.: NUCL. DATA SHEETS, 22, 243 (1977).                 
 5) GILBERT A., CAMERON A.G.W.: CAN. J. PHYS., 43, 1446 (1965).   
 6) MUGHABGHAB S.F.: "NEUTRON CROSS SECTIONS, VOL.1, NEUTRON      
    RESONANCE PARAMETERS AND THERMAL CROSS SECTIONS , PART B,     
    Z=61-100", ACADEMIC PRESS (1984).                             
 7) SMITH A.B. ET AL.: ANL/NDM-50 (1979).