63-Eu-157

 63-Eu-157 JAEA       EVAL-Nov09 N.Iwamoto                        
                      DIST-MAY10                       20100119   
----JENDL-4.0         MATERIAL 6343                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
                                                                  
History                                                           
09-11 The data above the resolved resonance region were evaluated 
      and compiled by N.Iwamoto.                                  
                                                                  
MF= 1 General information                                         
  MT=451 Descriptive data and directory                           
                                                                  
MF= 2  Resonance parameters                                       
  MT=151 Resolved and unresolved resonance parameters             
    No resolved resonance parameters                              
                                                                  
    Unresolved resonance region : 4.0 eV - 170 keV                
      The unresolved resonance paramters (URP) were determined by 
      ASREP code /1/ so as to reproduce the evaluated total and   
      capture cross sections calculated with optical model code   
      CCOM /2/ and CCONE /3/. The unresolved parameters           
      should be used only for self-shielding calculation.         
                                                                  
      Thermal cross sections and resonance integrals at 300 K     
      ----------------------------------------------------------  
                       0.0253 eV           res. integ. (*)        
                        (barn)               (barn)               
      ----------------------------------------------------------  
       Total           4.0615e+03                                 
       Elastic         9.0296e+00                                 
       n,gamma         4.0516e+03           1.9250e+03            
       n,alpha         3.9811e-12                                 
      ----------------------------------------------------------  
         (*) Integrated from 0.5 eV to 10 MeV.                    
                                                                  
MF= 3 Neutron cross sections                                      
  MT=  1 Total cross section                                      
    Sum of partial cross sections.                                
                                                                  
  MT=  2 Elastic scattering cross section                         
    Obtained by subtracting non-elastic scattering cross sections 
      from total cross section.                                   
                                                                  
  MT=  4 (n,n') cross section                                     
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 16 (n,2n) cross section                                     
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 17 (n,3n) cross section                                     
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 22 (n,na) cross section                                     
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 28 (n,np) cross section                                     
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 32 (n,nd) cross section                                     
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 33 (n,nt) cross section                                     
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 41 (n,2np) cross section                                    
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 51-91 (n,n') cross section                                  
    Calculated with CCONE code /3/.                               
                                                                  
  MT=102 Capture cross section                                    
    Calculated with CCONE code /3/.                               
                                                                  
  MT=103 (n,p) cross section                                      
    Calculated with CCONE code /3/.                               
                                                                  
  MT=104 (n,d) cross section                                      
    Calculated with CCONE code /3/.                               
                                                                  
  MT=105 (n,t) cross section                                      
    Calculated with CCONE code /3/.                               
                                                                  
  MT=106 (n,He3) cross section                                    
    Calculated with CCONE code /3/.                               
                                                                  
  MT=107 (n,a) cross section                                      
    Calculated with CCONE code /3/.                               
                                                                  
MF= 4 Angular distributions of emitted neutrons                   
  MT=  2 Elastic scattering                                       
    Calculated with CCONE code /3/.                               
                                                                  
MF= 6 Energy-angle distributions of emitted particles             
  MT= 16 (n,2n) reaction                                          
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 17 (n,3n) reaction                                          
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 22 (n,na) reaction                                          
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 28 (n,np) reaction                                          
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 32 (n,nd) reaction                                          
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 33 (n,nt) reaction                                          
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 41 (n,2np) reaction                                         
    Calculated with CCONE code /3/.                               
                                                                  
  MT= 51-91 (n,n') reaction                                       
    Calculated with CCONE code /3/.                               
                                                                  
  MT=102 Capture reaction                                         
    Calculated with CCONE code /3/.                               
                                                                  
                                                                  
                                                                  
***************************************************************** 
       Nuclear Model Calculation with CCONE code /3/              
***************************************************************** 
                                                                  
  Models and parameters used in the CCONE calculation             
  1) Optical model                                                
    * coupled channels calculation                                
      coupled levels: 0,1,2,5 (see Table 1)                       
                                                                  
    * optical model potential                                     
      neutron  omp: Kunieda,S. et al./4/ (+)                      
      proton   omp: Koning,A.J. and Delaroche,J.P./5/             
      deuteron omp: Lohr,J.M. and Haeberli,W./6/                  
      triton   omp: Becchetti Jr.,F.D. and Greenlees,G.W./7/      
      He3      omp: Becchetti Jr.,F.D. and Greenlees,G.W./7/      
      alpha    omp: McFadden,L. and Satchler,G.R./8/              
      (+) omp parameters were modified.                           
                                                                  
  2) Two-component exciton model/9/                               
    * Global parametrization of Koning-Duijvestijn/10/            
      was used.                                                   
    * Gamma emission channel/11/ was added to simulate direct     
      and semi-direct capture reaction.                           
                                                                  
  3) Hauser-Feshbach statistical model                            
    * Width fluctuation correction/12/ was applied.               
    * Neutron, proton, deuteron, triton, He3, alpha and gamma     
      decay channel were taken into account.                      
    * Transmission coefficients of neutrons were taken from       
      optical model calculation.                                  
    * The level scheme of the target is shown in Table 1.         
    * Level density formula of constant temperature and Fermi-gas 
      model were used with shell energy correction/13/.           
      Parameters are shown in Table 2.                            
    * Gamma-ray strength function of enhanced generalized         
      Lorentzian form/14/,/15/ was used for E1 transition.        
      For M1 and E2 transitions the standard Lorentzian form was  
      adopted. The prameters are shown in Table 3.                
                                                                  
                                                                  
------------------------------------------------------------------
                              Tables                              
------------------------------------------------------------------
                                                                  
Table 1. Level Scheme of Eu-157                                   
  -------------------                                             
  No.  Ex(MeV)  J  PI                                             
  -------------------                                             
   0  0.00000  5/2 +  *                                           
   1  0.07671  7/2 +  *                                           
   2  0.17700  9/2 +  *                                           
   3  0.19786  5/2 -                                              
   4  0.26323  7/2 -                                              
   5  0.29600 11/2 +  *                                           
   6  0.35000  9/2 -                                              
   7  0.39433  3/2 +                                              
   8  0.45350  5/2 +                                              
   9  0.45700 11/2 -                                              
  10  0.53900  7/2 +                                              
  11  0.58400 13/2 -                                              
  12  0.64500  9/2 +                                              
  13  0.67042  5/2 +                                              
  14  0.71631  5/2 +                                              
  15  0.72400 15/2 -                                              
  -------------------                                             
  *) Coupled levels in CC calculation                             
                                                                  
Table 2. Level density parameters                                 
  --------------------------------------------------------        
  Nuclide      a*    Pair  Eshell       T      E0  Ematch         
            1/MeV     MeV     MeV     MeV     MeV     MeV         
  --------------------------------------------------------        
   Eu-158 18.8084  0.0000  2.4374  0.4933 -1.3276  3.5000         
   Eu-157 18.0565  0.9577  2.7904  0.5507 -0.9395  5.3155         
   Eu-156 18.0000  0.0000  2.8275  0.5361 -1.7176  4.0906         
   Eu-155 17.9000  0.9639  3.3259  0.5676 -1.2578  5.7030         
   Sm-157 19.4276  0.9577  2.5335  0.5242 -0.9010  5.1968         
   Sm-156 18.7270  1.9215  2.8073  0.5682 -0.4051  6.8309         
   Sm-155 19.5000  0.9639  2.9414  0.5495 -1.3709  5.8007         
   Sm-154 18.5215  1.9340  3.2136  0.5576 -0.3117  6.6726         
   Pm-156 18.6060  0.0000  2.3185  0.3189  0.0173  1.0000         
   Pm-155 17.8584  0.9639  2.7732  0.5535 -0.9127  5.3040         
   Pm-154 18.4033  0.0000  2.5027  0.3188  0.0149  1.0000         
   Pm-153 17.6600  0.9701  3.1546  0.5829 -1.3375  5.8693         
   Pm-152 18.2003  0.0000  3.4439  0.4590 -1.0726  3.0071         
   Pm-151 17.4614  0.9765  3.7662  0.5765 -1.3653  5.8316         
  --------------------------------------------------------        
                                                                  
Table 3. Gamma-ray strength function for Eu-158                   
  --------------------------------------------------------        
  K0 = 2.300   E0 = 4.500 (MeV)                                   
  * E1: ER = 12.33 (MeV) EG = 3.15 (MeV) SIG = 132.48 (mb)        
        ER = 16.12 (MeV) EG = 5.26 (MeV) SIG = 264.96 (mb)        
  * M1: ER =  7.58 (MeV) EG = 4.00 (MeV) SIG =   1.46 (mb)        
  * E2: ER = 11.65 (MeV) EG = 4.21 (MeV) SIG =   3.55 (mb)        
  --------------------------------------------------------        
                                                                  
References                                                        
 1) Kikuchi,Y. et al.: JAERI-Data/Code 99-025 (1999)              
    [in Japanese].                                                
 2) Iwamoto,O.: JAERI-Data/Code 2003-020 (2003).                  
 3) Iwamoto,O.: J. Nucl. Sci. Technol., 44, 687 (2007).           
 4) Kunieda,S. et al.: J. Nucl. Sci. Technol. 44, 838 (2007).     
 5) Koning,A.J. and Delaroche,J.P.: Nucl. Phys. A713, 231 (2003)  
    [Global potential].                                           
 6) Lohr,J.M. and Haeberli,W.: Nucl. Phys. A232, 381 (1974).      
 7) Becchetti Jr.,F.D. and Greenlees,G.W.: Ann. Rept.             
    J.H.Williams Lab., Univ. Minnesota (1969).                    
 8) McFadden,L. and Satchler,G.R.: Nucl. Phys. 84, 177 (1966).    
 9) Kalbach,C.: Phys. Rev. C33, 818 (1986).                       
10) Koning,A.J., Duijvestijn,M.C.: Nucl. Phys. A744, 15 (2004).   
11) Akkermans,J.M., Gruppelaar,H.: Phys. Lett. 157B, 95 (1985).   
12) Moldauer,P.A.: Nucl. Phys. A344, 185 (1980).                  
13) Mengoni,A. and Nakajima,Y.: J. Nucl. Sci. Technol., 31, 151   
    (1994).                                                       
14) Kopecky,J., Uhl,M.: Phys. Rev. C41, 1941 (1990).              
15) Kopecky,J., Uhl,M., Chrien,R.E.: Phys. Rev. C47, 312 (1990).