17-Cl- 37

 17-CL- 37 KHI        EVAL-MAR94 T.WATANABE                       
                      DIST-MAR02 REV2-FEB02            20020208   
----JENDL-3.3         MATERIAL 1731                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
                                                                  
HISTORY                                                           
94-3  Newly evaluated                                             
00-11 JENDL-3.3                                                   
      ***** 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(below 202.0keV)                        
  mt=151 resolved resonance parameters                            
  Resolved resonance parameters for MLBW formula with varing scat-
  ering radius. Negative energy level data were adjusted to       
  reproduce 2200m/s cross sections.                               
  Evaluation was mainly based on Macklin's/1/ data and            
  Mughabghab's/2/ compilation.                                    
                                                                  
  calculated 2200-m/s cross sections and res. integrals (barns)   
                     2200 m/s               res. integ.           
      total           1.583                    -                  
      elastic         1.15                     -                  
      capture         0.433                   0.204               
                                                                  
mf=3  Neutron cross sections                                      
  Below 202 keV, resonance parameters were given.                 
  Above 202 keV, the total, elastic and inelastic scattering, and 
  capture cross sections were calculated with the optical and     
  statistical model code casthy/3/.                               
  Direct/semidirect cross section normalized to 0.286mb at        
  14 MeV were corrected to casthy's results/4/.                   
  Optical model parameters used in casthy calculation were as     
  follows.                                                        
                                                                  
                depth (MeV)       radius(fm)    diffuseness(fm)   
         ----------------------   ------------  ---------------   
     V  = 46.68-0.3459E         , r0 =  4.8317     , a0 =  0.308  
     Ws = 3.584+1.224E          , rs =  4.7751     , as =  0.338  
     Vso= 6.2                   , rso=  3.9987     , aso=  0.638  
                                                                  
  The level scheme was adopted from ENSDF file/5/.                
           no.      energy(MeV)    spin-parity   beta2/beta3      
           gr.       0.0            3/2 +                         
            1        1.7266         1/2 +        0.2              
            2        3.0866         5/2 +        0.2              
            3        3.1033         7/2 -        0.25             
            4        3.6260         3/2 +        0.15             
            5        3.7078         3/2 +        0.15             
            6        3.7409         5/2 -        0.25             
            7        4.0099         9/2 -        0.2              
            8        4.0163         3/2 +        0.15             
            9        4.1766         3/2 -        0.2              
           10        4.2689         1/2 +        0.15             
           11        4.2726         7/2 -        0.2              
           12        4.3963         5/2 +        0.1              
           13        4.4600         7/2 -                         
           14        4.5460        11/2 -                         
           15        4.7700        13/2 +                         
           16        4.8012         5/2 +                         
           17        4.8109         7/2 +                         
           18        4.8376         5/2 +                         
           19        4.8540         1/2 -                         
           20        4.9042         7/2 +                         
           21        4.9210         9/2 -                         
           22        4.9230        13/2 +                         
           23        4.9608         3/2 +                         
           24        4.9740        13/2 +                         
           25        5.0093         5/2 +                         
           26        5.0552         5/2 +                         
           27        5.0591         3/2 -                         
      Levels above 5.06 MeV 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- 37      Cl- 38             
                                 --------    --------             
          a (1/MeV)                 5.564       6.299             
          spin cut-off param.       3.824       4.142             
          pairing energy (MeV)      2.040       0.0               
          normalization factor     389.80      453.22             
          e-joint (MeV)             7.099       3.313             
                                                                  
  The capture cross section was adjusted to dovbenkos data/6/.    
                                                                  
  mt=16,22,28,32,33,103,104,105,106,107                           
     (n,2n),(n,na),(n,np),(n,nd),(n,nt),(n,p),(n,d),(n,t),        
     (n,he-3),(n,a)                                               
  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   :Pperey-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,na)      3.93    mb       systematics/13/                 
     (n,p)      22.3     mb       Kawade's data/14/               
     (n,d)       8.18    mb       systematics                     
     (n,t)       0.84    mb       systematics                     
     (n,a)      31.5     mb       av. exp. data/15,16,17/         
                                                                  
mf=4  Angular distributions of secondary neutrons                 
  mt=2,16,22,28,32,51-77,91                                       
  Elastic and inelastic scattering cross section,(n,2n),(n,na),   
  (n,np) and (n,nd)                                               
  Angular distributions were calculated with casthy for ela-      
  stically and inelastically scattered neutrons.                  
  Direct inelastic contribution were calculated with dwucky/18/.  
  Deformation parameters used in dwucky calculation were          
  evaluated from compilations/19,20/ and ENSDF half life data.    
  As for (n,2n),(n,na),(n,np) and (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 egansh-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)S.Igarasi,T.Fukahori    JAERI-1321    (1991)                   
 4)T.Nakagawa              CAPDIR manual                          
 5)Evaluated Nuclear Structural Data File                         
 6)A.G. Dovbenko et al.    AE 23,151(1967)                        
 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)R.A.Forrest             AERE-R 12419(1986)                     
14)K.Kawade et al.         JAERI-M 90-171(1990)                   
15)R.Prasad                NP 85,476(1966)                        
16)I.N.Ngoc                Ngoc                                   
17)R.S.Scalan et al.       NP 9,334(1958)                         
18)N.Yamamuro              JAERI-M 88-140(1988)                   
19)S.Raman et.al.          AND 42,1(1989)                         
20)R.H.Spear               AND 42,55(1989)