9-F - 19

  9-F - 19 JAERI      EVAL-JUL89 T.SUGI                           
                      DIST-MAY10                       20090828   
----JENDL-4.0         MATERIAL  925                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
                                                                  
   ===========================================================    
              The data were taken from JENDL-3.3.                 
   ===========================================================    
                                                                  
                                                                  
HISTORY                                                           
83-11 Evaluation for JENDL-2 was performed by Sugi and Nishimura  
      (jaeri)/1/.                                                 
89-07 Resonance parameters and total cross section were           
      re-evaluated for JENDL-3.                                   
89-07 Compiled by T. Narita (jaeri).                              
94-06 JENDL-3.2.                                                  
       Gamma prodction data modified by T.Asami (Data Eng.).      
       Other data were mainly adopted from JENDL fusion file.     
      Compiled by T.Nakagawa (ndc/jaeri)                          
                                                                  
     *****   Modified parts for JENDL-3.2   ********************  
      (3,2), (3,4), (3,22), (3,28), (3,52-91), (3,104), (3,251)   
      All angular distributions                                   
      All energy distributions                                    
      New evaluation fot gamma-ray production data                
     ***********************************************************  
     -------------------------------------------------------------
      JENDL fusion file /2/  (as of Jun. 1994)                    
            Evaluated and compiled by S.Chiba (ndc/jaeri).        
                                                                  
      The calculations have been carried out with the sincros-II  
      code system (dwucky, egnash and casthy2y) /3/.  the         
      following set of omps were selected:                        
          n     : Yamamuro (modified Walter-Guss) /3/             
          p     : Perey and Walter-Guss combined /4/              
          d     : Lohr-Haeberli /5/                               
          t     : Becchetti-Greenlees /6/                         
          he-3  : Becchetti-Greenlees /6/                         
          alpha : Lemos set modified by Arthur-Young /7/          
                                                                  
      The following values of level density parameters (1/MeV)    
      were used to reproduce the ddx at 14 MeV:                   
                                                                  
      F-20 F-19 F-18 O-19 O-18 O-17 N-17 N-16 N-15 N-14 C-15 C-14 
      4.49 3.50 2.50 2.50 3.00 2.99 3.51 2.00 2.00 2.03 2.84 2.46 
                                                                  
      The data were taken from JENDL-3.1 except for the following:
                                                                  
       mf=3, mt= 2: adjusted to conserve the total c.s.           
       mf=3, mt= 3: calculated as a sum of reaction c.s.          
       mf=3, mt= 4: calcaulated as a sum of inelastic c.s.        
       mf=3, mt=22, 28, 32, 91 : taken from the sincros-II        
                    calculation                                   
       mf=3, mt=52: replaced by the sincros-II calculation above  
                    2.5 mev                                       
       mf=3, mt=53-60: replaced by the sincros-II calculation     
       mf=3, mt=203,204,205,207: taken from the sincros-II calc.  
       mf=4, mt= 2: repalced by the sincros-II calculation        
       mf=6, mt=22, 28, 32, 91 : taken from the sincros-II        
                    calculation.  Kumabe's systematics was used.  
       mf=6, mt=203,204,205,207: taken from the sincros-II        
                    calculation.  Kalbach's systematics was used. 
     -------------------------------------------------------------
00-10 JENDL-3.3                                                   
      Compiled by K.Shibata (jaeri).                              
      *****  Modified parts for JENDL-3.3 ************************
      (1,451)           Updated.                                  
      (3,203-207)       Calculated.                               
      (3,251)           Deleted.                                  
      (4,2)             Transformation matrix deleted.            
      (4,16-28)         Deleted.                                  
      (5,16-28)         Deleted.                                  
      (6,16-28)         Taken from JENDL fusion file.             
      (6,203-207)       Taken from JENDL fusion file.             
      ************************************************************
                                                                  
                                                                  
mf=1  General information                                         
  mt=451  Descriptive data and dictionary                         
                                                                  
mf=2  Resonance parameters                                        
  mt=151  Resolved resonance parameters : 1.0e-5 eV - 100 keV     
      The multi-level Breit-Wigner formula was used.              
      Res. energies and gam-n : The first two levels were based on
         Johnson et al. /8/.  The 3rd and 4th levels were adjusted
         so as to fit to the experimental data of Larson et al./9/
      Gam-g : The first three levels were based on Macklin and    
         Winters /10/.  The 4th level was adjusted so as to fit to
         the recommended thermal capture cross section of         
         Mughabghab et al./11/.                                   
      Scattering radius: 5.525 fm                                 
                                                                  
      calculated 2200-m/s cross sections and res. integrals.      
                     2200 m/s     res. integ.                     
         elastic     3.643 b         -                            
         capture     9.6 milli-b   19.5 milli-b                   
         total       3.652 b         -                            
                                                                  
mf=3  Neutron cross sections                                      
  mt=1    Total cross section                                     
      Below 100 keV: no background.                               
      Above 100 keV: based on the experimental data of Larson et  
      al./9/                                                      
  mt=2    Elastic scattering cross section                        
      Derived by subtracting the nonelastic cross section from    
      the total cross section.                                    
  mt=4    Total inelastic scattering cross section                
      Sum of mt=51-60,91.                                         
  mt=16   (n,2n) cross section                                    
      Calculated by fitting the Pearlstein's function /12/ to the 
      experimental data.                                          
  mt=22   (n,n' alpha) and (n,alpha n') cross sections            
      Calculated by the sincros-II code system.                   
  mt=28   (n,n' p) and (n,p n') cross sections                    
      Calculated by the sincros-II code system.                   
  mt=32   (n,n'd) cross secton                                    
      Calculated by the sincros-II code system.                   
  mt=51-60  Inelastic scattering cross sections                   
      mt=51 (taken from JENDL-3.1)                                
        Up to 1 MeV     : based on the experimental data of Broder
               et al. /13/.                                       
        1 MeV - 5.5 MeV : calculated with the Hauser-Feshbach     
               method (eliese-3 /14/) taking into account         
               (n,alpha) and (n,p) as competing processes.  The   
               level scheme of F-19, N-16 and O-19 was taken from 
               Ajzenberg-Selove /15,16/.  The optical potential   
               parameters are :                                   
                    V  = 51.56 - 1.492*E    (MeV),                
                    Ws = 11.82              (MeV),                
                    Vso= 10.0               (MeV),                
                    r0 = rs = rso = 1.31    (fm),                 
                    a = aso = 0.66          (fm),                 
                    b = 0.47                (fm).                 
         The level density parameter of 3.609 (1/MeV)/17/ and     
         pairing energy of 2.52 MeV /18/ were used.               
      mt=52                                                       
        Up to 2.5 MeV: taken from JENDL-3.1, which is based on the
                       data of Broder et al. /13/.                
        Above 2.5 MeV: calculated by the sincros-II code system.  
      mt=53 - 60                                                  
        Calculated by the sincros-II code system.                 
      The sincros-II calculation adopted the following discrete   
      levels.  The levels with L and Beta-L include the           
      contribution of direct inelastic scattering, which was      
      calculated assuming the weak-coupling model by the DWBA     
      method:                                                     
                                                                  
        ----------------------------------------------            
         mt   ex(MeV)   spin-parity     L       beta-L            
        ----------------------------------------------            
         2    0.0          1/2+                                   
        51    0.1099       1/2-                                   
        52    0.1972       5/2+         2         0.4             
        53    1.3457       5/2-                                   
        54    1.4585       3/2-                                   
        55    1.5541       3/2+         2         0.6             
        56    2.7798       9/2+         4         0.4             
        57    3.9071       3/2+                                   
        58    3.9985       7/2-                                   
        59    4.0325       9/2-                                   
        60    4.3777       7/2+         4         0.4             
        ----------------------------------------------            
                                                                  
  mt=91   Inelastic to continuum                                  
      Calculated with sincros-II code system.                     
  mt=102  Capture cross section                                   
      Below 100 keV      : no background.                         
      100 keV - 1.87 MeV : based on the experimental data of      
                           Gabbard et al. /19/.                   
      1.87 MeV - 20 MeV  : assumed to decrease with 1/v law.      
  mt=103  (n,p) cross section                                     
      Up to 9 MeV    : based on the experimental data of Bass et  
                       al. /20/.                                  
      9 MeV - 20 MeV : calculated with the statistical model by   
                       using Pearlstein' empirical formula.       
  mt=104  (n,d) cross section                                     
      Calculated by the sincros-II code system.                   
  mt=105  (n,t) cross section                                     
      Calculated by the sincros-II code system.                   
  mt=107  (n,alpha) cross section                                 
      Below 9 MeV, based on the following experimental data:      
          Up to 4MeV      Davis et al. /21/,                      
          4MeV - 5.5MeV   Smith et al. /22/,                      
          5.5MeV - 9MeV   Bass et al. /20/.                       
      Above 9 MeV, calculated with the Pearlstein's formula.      
  mt=203  Total proton production                                 
      Sum of mt=28 and 103.                                       
  mt=204  Total deuteron production                               
      Sum of mt=32 and 104.                                       
  mt=205  Total triton production                                 
      Equal to mt=105.                                            
  mt=207  Total alpha production                                  
      Sum of mt=22 and 107.                                       
                                                                  
mf=4  Angular distributions of secondary neutrons                 
  mt=2                                                            
      Calculated with optical model by the sincros-II code system.
  mt=51-60                                                        
      Calculated by the sincros-II code system.                   
                                                                  
mf=6  Energy-angle distributions of secondary particles           
  mt=16,22,28,32,91                                               
      Calculated usingt the sincros-II code system and Kumabe's   
      systematics /23/.                                           
  mt=203,204,205,207                                              
      Based on Kalbach's systematics/24/.                         
                                                                  
mf=12 Photon production multiplicities                            
  mt=51-60, 102, 103, 107                                         
      Calculated with the gnash code /7/.                         
                                                                  
mf=13 Photon production cross sections                            
  mt=3                                                            
      Calculated with the gnash code/7/.                          
                                                                  
mf=14 Photon angular distributions                                
  mt=3,51-60,102,103,107                                          
      Isotropic                                                   
                                                                  
mf=15 Photon energy distributions                                 
  mt=3,102,103.107                                                
      Calculated with the gnash code/7/.                          
                                                                  
References                                                        
 1) Sugi T. and Nishimura K.: JAERI-M 7253 (1977), English trans- 
    lation : ORNL-TR-4605.                                        
 2) Chiba, S. et al.: JAERI-M 92-027, p.35(1992).                 
 3) Yamamuro, N.: JAERI-M 90-006 (1990).                          
 4) Walter, R.L. and Guss, P.P.: Int. Conf. on Nucl. Data for     
    Basic and Applied Science, Santa Fe, p.1079 (1986).           
 5) Lohr, J.M. and Haeberli, W.: Nucl. Phys. A232, 381 (1974).    
 6) Becchetti, F.D. and Greenlees, G.W.: "Polarization Phenomena  
    in Nuclear Reactions", Univ. of Wisconsin Press, p.682        
    (1971).                                                       
 7) Arthur, E.D. and Young, P.G.: LA-8626-MS (1980).              
 8) Johnson C.H. et al.: ORNL-5025 (1975).                        
 9) Larson D.C. et al.: ORNL/TM-5612 (1976).                      
10) Macklin R.L. and Winters R.R.: Phys. Rev. C7, 1766 (1973).    
11) Mughabghab S.F. et al.: Neutron Cross Sections, Vol.1, Part A,
    Z=1-60, Academic Press (1981).                                
12) Pearlstein S.: Nucl. Sci. Eng. 23, 238 (1965).                
13) Broder et al.: 70 Helsinki Conf. 2, 295 (1970).               
14) Igarasi S.: JAERI 1224 (1972).                                
15) Ajzenberg-Selove F.: Nucl. Phys. A166, 1 (1971).              
16) Ajzenberg-Selove F.: Nucl. Phys. A190, 1 (1972).              
17) Abdelmalek N.N. and Stavinsky V.S.: Nucl. Phys. 58, 601 (1964)
18) Newton T.D.: Can. J. Phys. 34, 804 (1956).                    
19) Gabbard F. et al.: Phys. Rev. 114, 201 (1959).                
20) Bass R. et al.: EANDC(E) 66-64.                               
21) Davis E.A. et al.: Nucl. Phys. 27, 448 (1961).                
22) Smith D.L. et al.: Phys. Rev. 117, 514 (1960).                
23) Kumabe, I. et al.: Nucl. Sci. and Eng., 104, 280 (1990).      
24) Kalbach C. : Phys. Rev. C37, 2350(1988).