66-Dy-160

 66-Dy-160 JAEA       EVAL-Nov09 N.Iwamoto,S.Chiba                
                      DIST-MAY10                       20100119   
----JENDL-4.0         MATERIAL 6637                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
                                                                  
History                                                           
09-11 The resolved resonance parameters were evaluated by         
      S.Chiba.                                                    
      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             
    Resolved resonance region (MLBW formula) : below 2.01 keV     
      The evaluation is based on the work of Mughabghab /1/       
      A scattering radius of 7.9 fm was used.                     
                                                                  
    Unresolved resonance region : 2.01 keV - 200.0 keV            
      The unresolved resonance paramters (URP) were determined by 
      ASREP code /2/ so as to reproduce the evaluated total and   
      capture cross sections calculated with optical model code   
      OPTMAN /3/ and CCONE /4/. 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           6.2144e+01                                 
       Elastic         5.4905e+00                                 
       n,gamma         5.6654e+01           1.1086e+03            
       n,alpha         9.4432e-07                                 
      ----------------------------------------------------------  
         (*) 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 /4/.                               
                                                                  
  MT= 16 (n,2n) cross section                                     
    Calculated with CCONE code /4/.                               
                                                                  
  MT= 17 (n,3n) cross section                                     
    Calculated with CCONE code /4/.                               
                                                                  
  MT= 22 (n,na) cross section                                     
    Calculated with CCONE code /4/.                               
                                                                  
  MT= 24 (n,2na) cross section                                    
    Calculated with CCONE code /4/.                               
                                                                  
  MT= 28 (n,np) cross section                                     
    Calculated with CCONE code /4/.                               
                                                                  
  MT= 32 (n,nd) cross section                                     
    Calculated with CCONE code /4/.                               
                                                                  
  MT= 51-91 (n,n') cross section                                  
    Calculated with CCONE code /4/.                               
                                                                  
  MT=102 Capture cross section                                    
    Calculated with CCONE code /4/.                               
                                                                  
  MT=103 (n,p) cross section                                      
    Calculated with CCONE code /4/.                               
                                                                  
  MT=104 (n,d) cross section                                      
    Calculated with CCONE code /4/.                               
                                                                  
  MT=105 (n,t) cross section                                      
    Calculated with CCONE code /4/.                               
                                                                  
  MT=106 (n,He3) cross section                                    
    Calculated with CCONE code /4/.                               
                                                                  
  MT=107 (n,a) cross section                                      
    Calculated with CCONE code /4/.                               
                                                                  
MF= 4 Angular distributions of emitted neutrons                   
  MT=  2 Elastic scattering                                       
    Calculated with CCONE code /4/.                               
                                                                  
MF= 6 Energy-angle distributions of emitted particles             
  MT= 16 (n,2n) reaction                                          
    Calculated with CCONE code /4/.                               
                                                                  
  MT= 17 (n,3n) reaction                                          
    Calculated with CCONE code /4/.                               
                                                                  
  MT= 22 (n,na) reaction                                          
    Calculated with CCONE code /4/.                               
                                                                  
  MT= 24 (n,2na) reaction                                         
    Calculated with CCONE code /4/.                               
                                                                  
  MT= 28 (n,np) reaction                                          
    Calculated with CCONE code /4/.                               
                                                                  
  MT= 32 (n,nd) reaction                                          
    Calculated with CCONE code /4/.                               
                                                                  
  MT= 51-91 (n,n') reaction                                       
    Calculated with CCONE code /4/.                               
                                                                  
  MT=102 Capture reaction                                         
    Calculated with CCONE code /4/.                               
                                                                  
                                                                  
                                                                  
***************************************************************** 
       Nuclear Model Calculation with CCONE code /4/              
***************************************************************** 
                                                                  
  Models and parameters used in the CCONE calculation             
  1) Optical model                                                
    * coupled channels calculation                                
      coupled levels: 0,1,2,3,5,18 (see Table 1)                  
                                                                  
    * optical model potential                                     
      neutron  omp: Kunieda,S. et al./5/                          
      proton   omp: Koning,A.J. and Delaroche,J.P./6/             
      deuteron omp: Lohr,J.M. and Haeberli,W./7/                  
      triton   omp: Becchetti Jr.,F.D. and Greenlees,G.W./8/      
      He3      omp: Becchetti Jr.,F.D. and Greenlees,G.W./8/      
      alpha    omp: Huizenga,J.R. and Igo,G./9/                   
                                                                  
  2) Two-component exciton model/10/                              
    * Global parametrization of Koning-Duijvestijn/11/            
      was used.                                                   
    * Gamma emission channel/12/ was added to simulate direct     
      and semi-direct capture reaction.                           
                                                                  
  3) Hauser-Feshbach statistical model                            
    * Width fluctuation correction/13/ 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/14/.           
      Parameters are shown in Table 2.                            
    * Gamma-ray strength function of generalized Lorentzian form  
      /15/,/16/ 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 Dy-160                                   
  -------------------                                             
  No.  Ex(MeV)  J  PI                                             
  -------------------                                             
   0  0.00000   0  +  *                                           
   1  0.08679   2  +  *                                           
   2  0.28382   4  +  *                                           
   3  0.58106   6  +  *                                           
   4  0.96617   2  +                                              
   5  0.96685   8  +  *                                           
   6  1.04910   3  +                                              
   7  1.15584   4  +                                              
   8  1.26475   2  -                                              
   9  1.27994   0  +                                              
  10  1.28560   1  -                                              
  11  1.28671   3  -                                              
  12  1.28866   5  +                                              
  13  1.34976   2  +                                              
  14  1.35867   2  -                                              
  15  1.38646   4  -                                              
  16  1.39896   3  -                                              
  17  1.40847   5  -                                              
  18  1.42803  10  +  *                                           
  19  1.43854   6  +                                              
  20  1.45675   0  +                                              
  21  1.48950   1  -                                              
  22  1.51842   2  +                                              
  23  1.52233   4  +                                              
  24  1.53515   4  -                                              
  25  1.55659   1  +                                              
  26  1.58674   5  -                                              
  27  1.59437   6  -                                              
  28  1.60378   4  +                                              
  29  1.60684   6  +                                              
  30  1.60786   4  +                                              
  31  1.61398   7  -                                              
  32  1.61727   7  +                                              
  33  1.64326   3  -                                              
  34  1.65087   4  -                                              
  35  1.65195   4  +                                              
  36  1.65366   4  +                                              
  37  1.65499   4  +                                              
  38  1.67610   4  -                                              
  39  1.69436   4  +                                              
  40  1.70814   0  +                                              
  -------------------                                             
  *) Coupled levels in CC calculation                             
                                                                  
Table 2. Level density parameters                                 
  --------------------------------------------------------        
  Nuclide      a*    Pair  Eshell       T      E0  Ematch         
            1/MeV     MeV     MeV     MeV     MeV     MeV         
  --------------------------------------------------------        
   Dy-161 20.0000  0.9457  2.7684  0.5468 -1.4246  5.8432         
   Dy-160 21.1000  1.8974  2.8705  0.5085 -0.2487  6.3915         
   Dy-159 19.1000  0.9517  3.1578  0.5560 -1.4112  5.8333         
   Dy-158 18.8000  1.9093  3.2464  0.5523 -0.3436  6.6448         
   Tb-160 18.9000  0.0000  2.5855  0.5446 -1.9885  4.4661         
   Tb-159 21.0000  0.9517  2.9024  0.4767 -0.7563  4.8234         
   Tb-158 19.3000  0.0000  3.0376  0.4617 -1.2200  3.2269         
   Tb-157 18.0565  0.9577  3.3696  0.5538 -1.1365  5.5068         
   Gd-159 19.9000  0.9517  2.6302  0.5300 -1.1252  5.4620         
   Gd-158 19.3000  1.9093  2.8152  0.5596 -0.4648  6.8458         
   Gd-157 20.0000  0.9577  3.0516  0.5315 -1.2892  5.6268         
   Gd-156 19.0000  1.9215  3.2702  0.5513 -0.3880  6.7098         
   Gd-155 20.5000  0.9639  3.7045  0.5229 -1.4800  5.7609         
   Gd-154 18.5215  1.9340  3.6018  0.5706 -0.6048  7.0075         
  --------------------------------------------------------        
                                                                  
Table 3. Gamma-ray strength function for Dy-161                   
  --------------------------------------------------------        
  * E1: ER = 12.33 (MeV) EG = 3.15 (MeV) SIG = 137.34 (mb)        
        ER = 16.01 (MeV) EG = 5.19 (MeV) SIG = 274.69 (mb)        
        ER =  4.42 (MeV) EG = 0.90 (MeV) SIG =   3.10 (mb)        
        ER =  3.10 (MeV) EG = 1.60 (MeV) SIG =   3.00 (mb)        
  * M1: ER =  7.54 (MeV) EG = 4.00 (MeV) SIG =   0.91 (mb)        
  * E2: ER = 11.58 (MeV) EG = 4.18 (MeV) SIG =   3.86 (mb)        
  --------------------------------------------------------        
                                                                  
References                                                        
 1) Mughabghab, S.F.: "Neutron Cross Sections, Vol. 1, Neutron    
   Resonance Parameters and Thermal Cross Sections, Part B",      
   Academic Press (1984).                                         
 2) Kikuchi,Y. et al.: JAERI-Data/Code 99-025 (1999)              
    [in Japanese].                                                
 3) Soukhovitski,E.Sh. et al.: JAERI-Data/Code 2005-002 (2004).   
 4) Iwamoto,O.: J. Nucl. Sci. Technol., 44, 687 (2007).           
 5) Kunieda,S. et al.: J. Nucl. Sci. Technol. 44, 838 (2007).     
 6) Koning,A.J. and Delaroche,J.P.: Nucl. Phys. A713, 231 (2003)  
    [Global potential].                                           
 7) Lohr,J.M. and Haeberli,W.: Nucl. Phys. A232, 381 (1974).      
 8) Becchetti Jr.,F.D. and Greenlees,G.W.: Ann. Rept.             
    J.H.Williams Lab., Univ. Minnesota (1969).                    
 9) Huizenga,J.R. and Igo,G.: Nucl. Phys. 29, 462 (1962).         
10) Kalbach,C.: Phys. Rev. C33, 818 (1986).                       
11) Koning,A.J., Duijvestijn,M.C.: Nucl. Phys. A744, 15 (2004).   
12) Akkermans,J.M., Gruppelaar,H.: Phys. Lett. 157B, 95 (1985).   
13) Moldauer,P.A.: Nucl. Phys. A344, 185 (1980).                  
14) Mengoni,A. and Nakajima,Y.: J. Nucl. Sci. Technol., 31, 151   
    (1994).                                                       
15) Kopecky,J., Uhl,M.: Phys. Rev. C41, 1941 (1990).              
16) Kopecky,J., Uhl,M., Chrien,R.E.: Phys. Rev. C47, 312 (1990).