32-Ge- 74

 32-GE- 74 KHI        EVAL-MAR94 T.WATANABE                       
                      DIST-MAR02 REV2-JUL01            20010713   
----JENDL-3.3         MATERIAL 3237                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
                                                                  
HISTORY                                                           
94-3  Newly evaluated.                                            
01-07 Compiled by K.Shibata for JENDL-3.3                         
      *********  modified parts for JENDL-3.3  *******************
      (1,451)       Updated.                                      
      (3,251)       Deleted.                                      
      (4,2)         Transformation matrix deleted.                
      (5,16-91)     INT=22                                        
      ************************************************************
                                                                  
mf=1  General information                                         
  mt=451 Comments and dictionary                                  
                                                                  
mf=2  Resonance parameters                                        
  mt=151 Resolved resonance parameters                            
  Resolved resonance parameters for MLBW formula (below 62.0 keV) 
  Negative energy level parameters were adjusted to reproduce     
  Koesters 2200m/s data/1/.                                       
  Level parameters were evaluated mainly based on Mughabghab's    
  compilation/2/.                                                 
                                                                  
  calculated 2200-m/s cross sections and res. integrals (barns)   
                     2200 m/s               res. integ.           
      total           7.2                      -                  
      elastic         6.8                      -                  
      capture         0.42                    0.46                
                                                                  
mf=3  Neutron cross sections                                      
  Below  62 keV, resonance parameters were given.                 
  Above  62 keV, the total, elastic and inelastic scattering, and 
  capture cross sections were calculated with the optical and     
  statistical model code casthy /3/.                              
  Optical model parameters used in casthy calculation were as     
  follows.                                                        
                                                                  
                depth (MeV)       radius(fm)    diffuseness(fm)   
         ----------------------   ------------  ---------------   
     V  = 52.07-0.7434E         , r0 =  5.1388     , a0 =  0.492  
     Ws = 9.997+0.1299E         , rs =  5.9239     , as =  0.36   
     Vso= 10.99                 , rso=  6.1716     , aso=  0.65   
                                                                  
  The level scheme was adopted from ENSDF file/4/.                
           no.      energy(MeV)    spin-parity     beta 2/3       
           gr.       0.0000          0  +                         
            1        0.5959          2  +          0.16           
            2        1.2042          2  +          0.12           
            3        1.4638          4  +                         
            4        1.4828          0  +                         
            5        1.6971          3  +                         
            6        1.7250          0  +                         
            7        1.9130          0  +                         
            8        2.1650          1  -                         
            9        2.1653          3  +                         
           10        2.1980          2  +          0.11           
           11        2.2277          0  +                         
           12        2.5363          3  -          0.11           
           13        2.5693          4  +                         
           14        2.6002          1  -                         
           15        2.6696          4  +                         
           16        2.6938          2  +                         
           17        2.6969          2  +                         
           18        2.7530          0  +                         
           19        2.8285          4  +                         
           20        2.8359          2  +                         
           21        2.8440          3  -                         
           22        2.9255          2  +                         
           23        2.9355          4  -                         
           24        2.9491          2  -                         
           25        2.9735          2  +          0.11           
           26        3.5000          2  +          0.1            
           27        4.0000          2  +          0.1            
      Levels above 3.02 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.                   
                                                                  
                                   Ge- 74      Ge- 75             
                                 --------    --------             
          a (1/MeV)                13.550      13.500             
          spin cut-off param.       9.473       9.540             
          pairing energy (MeV)      3.240       1.360             
          normalization factor    1898.60     1917.20             
          E-joint (MeV)            10.660       7.654             
                                                                  
  The capture cross section were normalized to 26 milli-          
  barns at 50keV/5/.                                              
  Above 1 MeV, direct/semidirect capture cross section normalized 
  to 0.77mb at 14 MeV, were added to casthy's result/6/.          
                                                                  
  mt=16,17,22,28,103,104,105,107                                  
     (n,2n),(n,3n),(n,na),(n,np),(n,p),(n,d),(n,t),(n,a)          
  were evaluated with modified egnash-2/7/ using f2=1.2 and       
  following optical potential                                     
     neutron   :same as used in casthy                            
     proton    :Perey's omp/8/                                    
     deutron   :Lohr-Haeberli's omp/9/                            
     triton    :Becchetti-Greenless omp/10/                       
     he-3      :Becchetti-Greenless omp/10/                       
     alpha     :Lemos omp/11/                                     
  and normalized to following data.                               
     (n,na)      0.6    mb      systematics/12/                   
     (n,np)      0.67   mb      Webber's data/13/                 
     (n,p)      11.5    mb      av.exp data/14,15/                
     (n,d)       2.0    mb      Konno's data/18/-exp.data/13/     
     (n,a)      18.0    mb      av.exp.data/16,17/                
                                                                  
mf=4  Angular distributions of secondary neutrons                 
  mt=2,16,17,22,28,51-77,91                                       
  Elastic and inelastic scattering cross section,(n,2n),(n,3n),   
  (n,na) and (n,np)                                               
  Angular distributions were calculated with casthy for ela-      
  stically and inelastically scattered neutrons.  The direct      
  inelastic scattering contribution were evaluated with           
  dwucky programm/19/. Deformation parameters used in dwucky      
  calculation were evaluated from compilations/20,21/ and         
  ensdf half life data and adjusted to reproduce ddx data/22/.    
  As for (n,2n),(n,3n),(n,na) and (n,np),isotropic distributions  
  was assumed.                                                    
                                                                  
mf=5  Energy distributions of secondary neutrons                  
  mt=16,17,22,28,91                                               
  For (n,2n),(n,3n),(n,na),(n,np) and continum inelastic scatter- 
  ing, secondary neutron energy distributions were calculated     
  with egnash-2.                                                  
                                                                  
References                                                        
 1)L. Koester et al.        Z.Phys. A327,129(1987)                
 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)Evaluated Nuclear Structural Data File                         
 5)V.A. Tolstikov           YFI-6.5 (1968)                        
 6)T. Nakagawa              Capdir manual                         
 7)N. Yamamuro              JAERI-M 90-006(1991)                  
 8)F.G. Perey               PR    131, 745(1963)                  
 9)J.M. Lohr, W. Haeberli   NP   A232, 381(1974)                  
10)F.D. Becchetti  and      Polarization Phenomena in Nuclear     
     G.W. Greenless         Reaction   682(1971) Univ. Wisconsin  
11)O.F. Lemos               Orsay Rep.Ser.A No.136(1972)          
12)R.A. Forrest             AERE-R 12419(1986)                    
13)L.D. Webber et al        BAP 13,1663(1968)                     
14)R. Rieppo et al.         JIN 38,1927(1976)                     
15)R.E. Wood et al.         PR 154,1108(1967)                     
16)R. Vaenskae et al        NIM 179,525(1981)                     
17)J.L. Casanova et al.     ARS 72,186(1976)                      
18)C. Konno et al.          JAERI-1329(1993)                      
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)                       
22)A. Takahashi et.al.      Oktavian data private com.