17-Cl- 35

 17-CL- 35 KHI        EVAL-MAR94 T.WATANABE                       
                      DIST-MAR02 REV2-FEB02            20020208   
----JENDL-3.3         MATERIAL 1725                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
                                                                  
HISTORY                                                           
94-3  Newly evaluated                                             
00-10 JENDL-3.3                                                   
      Compiled by K.Shibata (jaeri)                               
      ***** Modified parts for JENDL-3.3 *************************
      (1,451)           Updated.                                  
      (3,251)           Deleted.                                  
      (4,2)             Transformation matrix deleted.            
      (5,16-91)         Distributions at threshold were modified. 
      ************************************************************
                                                                  
mf=1  General information                                         
  mt=451 Comments and dictionary                                  
                                                                  
mf=2  Resonance parameters                                        
  mt=151 resolved resonance parameters(below 226keV)              
  Resolved resonance parameters for MLBW formula.                 
  Negative energy level parameters were adjusted to reproduce     
  2200m/s cross sections.                                         
  Evaluation was mainly based on Macklin's/1/ data and            
  Mughabghab's/2/ compilation.                                    
  Below 226keV,(n,p) and (n,a) cross sections were given as       
  background total cross section.                                 
                                                                  
  calculated 2200-m/s cross sections and res. integrals (barns)   
                     2200 m/s               res. integ.           
      total          64.2                      -                  
      elastic        20.6                      -                  
      capture        43.6                     17.8                
                                                                  
mf=3  Neutron cross sections                                      
  Below 226 keV, resonance parameters were given.                 
  Above 226 keV, the total, elastic and inelastic scattering, and 
  capture cross sections were calculated with the optical and     
  statistical model code casthy/4/.                               
  Above 1.0MeV, direct/semidirect capture normalized to 0.349mb at
  14MeV were added to casthys results/5/.                         
  Optical model parameters used in casthy calculation were shown  
  as follows.                                                     
                                                                  
                depth (MeV)       radius(fm)    diffuseness(fm)   
         ----------------------   ------------  ---------------   
     V  = 46.68-0.3459E         , r0 =  4.743      , a0 =  0.308  
     Wi =-0.0007E**2            , ri =  0.0        , ai =  0.0    
     Ws = 3.584+1.224E          , rs =  4.6874     , as =  0.338  
     Vso= 6.2                   , rso=  3.9253     , aso=  0.638  
                                                                  
  The level scheme was adopted from ENSDF file/6/.                
           no.      energy(MeV)    spin-parity    beta2/beta3     
           gr.       0.0            3/2 +                         
            1        1.2193         1/2 +         0.28            
            2        1.7632         5/2 +         0.15            
            3        2.6453         7/2 +         0.2             
            4        2.6936         3/2 +         0.25            
            5        3.0026         5/2 +         0.2             
            6        3.1626         7/2 -         0.25            
            7        3.9185         3/2 +         0.2             
            8        3.9432         9/2 +         0.2             
            9        3.9675         1/2 +         0.15            
           10        4.0592         3/2 -         0.25            
           11        4.1133         7/2 +         0.15            
           12        4.1734         5/2 -         0.2             
           13        4.1779         3/2 -         0.2             
           14        4.3473         9/2 -                         
           15        4.6242         3/2 +                         
           16        4.7679         7/2 -                         
           17        4.8406         1/2 +                         
           18        4.8544         1/2 +                         
           19        4.8817         7/2 +                         
           20        5.0104         1/2 -                         
      Levels above 5.02MeV were assumed to be overlapping.        
                                                                  
  Parameters for the composite level density formula of Gilbert-  
  Cameron were evaluated.                                         
  Spin cut-off parameter c1 was taken as 0.146.                   
                                                                  
                                   Cl- 35      Cl- 36             
                                 --------    --------             
          a (1/MeV)                 5.205       5.434             
          spin cut-off param.       3.564       3.711             
          pairing energy (MeV)      1.860       0.0               
          normalization factor     344.94      370.41             
          e-joint (MeV)             7.542       3.561             
                                                                  
  The capture cross section was normalized to 3 millibarns at     
  100 keV.                                                        
                                                                  
  mt=16,22,28,32,103,104,105,106,107,111                          
     (n,2n),(n,na),(n,np),(n,nd),(n,p),(n,d),(n,t),(n,he-3),      
     (n,a),(n,2p)                                                 
  These cross sections were evaluated with modified egnash-2/7/   
  using f2=0.5 and following optical potential                    
     neutron   :same as used in casthy                            
     proton    :Perey's omp/8/                                    
     deutron   :Perey-Perey's omp/9/                              
     triton    :Ragaini's omp/10/                                 
     he-3      :Luetzeshwab's omp/11/                             
     alpha     :Bock's omp/12/                                    
  and normalized to following data.                               
     (n,2n)       9.6   mb     av. exp. data/13,14/               
     (n,p)      125.0   mb     av. exp. data/16,17/               
     (n,d)       12.6   mb     systematics/15/                    
     (n,a)      117.0   mb     av. exp. data/18/                  
                                                                  
  Below 58.607keV, (n,p) cross section was calculated using       
  koehlers resonance parameters/3/. Energy dependence of low      
  energy (n,a) cross section was assumed as 1/v and normalized    
  to 0.08mb at 2200 m/s./2/                                       
                                                                  
mf=4  Angular distributions of secondary neutrons                 
  mt=2,16,22,28,32,51-70,91                                       
  Elastic and inelastic scattering cross section,(n,2n),(n,na),   
  (n,np),(n,nd)                                                   
  Angular distributions were calculated with casthy for ela-      
  stically and inelastically scattered neutrons. The direct       
  inelastic scattering contribution was evaluated with dwucky/19/.
  deformation parameters used in dwucky calculation were evaluted 
  from compilaiton/20,21/, and ENSDF half life data.              
  As for (n,2n),(n,na),(n,np),(n,nd) isotropic distributions were 
  assumed.                                                        
                                                                  
mf=5  Energy distributions of secondary neutrons                  
  mt=16,22,28,32,91                                               
  For (n,2n),(n,na),(n,np),(n,nd) and continum inelastic          
  scattering cross sections, secondary neutron energy distribution
  were calculated with egnash-2.                                  
                                                                  
References                                                        
 1)R.L.Macklin  et. at.,   PR    C29,1996(1984)                   
 2)S.F.Mughabghab et. al., Neutron Cross Section Vol.1 Part A     
                           Academic Press(1981)                   
 3)P.E.Koehler             PR/C44,1675(1991)                      
 4)S.Igarasi,T.Fukahori    JAERI-1321    (1991)                   
 5)T.Nakagawa              CAPDIR  manual                         
 6)Evaluated Nuclear Structural Data File                         
 7)N.Yamamuro              JAERI-M 90-006(1991)                   
 8)F.G.Perey               PR    131, 745(1963)                   
 9)C.M.Perey,F.G.Perey     PR    132, 752(1963)                   
10)R.C.Ragaini et. al.     PR     C2,1020(1970)                   
11)J.W.Luetzelscfwab et.al PR    180,1023(1964)                   
12)R.Bock et. al.          NP    A92, 539(1967)                   
13)Y.Ikeda et al.          JAERI-1312(1988)                       
14)G.Peto                  AHP,24,93(1968)                        
15)R.A.Forrest             AERE-R 12419(1986)                     
16)D.L.Allan               NP 24,274(1961)                        
17)W.Scantl                Scantl                                 
18)W.Nagel                 Nagel                                  
19)N.Yamamuro              JAERI-M 88-140(1988)                   
20)S.Raman et.al.          AND 42,1(1989)                         
21)R.H.Spear               AND 42,55(1989)