32-Ge- 70

 32-GE- 70 KHI        EVAL-MAR94 T.WATANABE                       
                      DIST-MAR02 REV2-JUL01            20010713   
----JENDL-3.3         MATERIAL 3225                               
-----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 15 keV)   
  Negative energy level parameters were adjusted to reproduce     
  Koesters 2200m/s data/1/.                                       
  Parameters were evaluated mainly based on Mughabghabs           
  compilation/2/.                                                 
                                                                  
  calculated 2200-m/s cross sections and res. integrals (barns)   
                     2200 m/s               res. integ.           
      total           15.43                    -                  
      elastic         12.5                     -                  
      capture          2.93                   2.51                
                                                                  
mf=3  Neutron cross sections                                      
  Below  15 keV, resonance parameters were given.                 
  Above  15 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 =  5.0445     , a0 =  0.492  
     Ws = 9.997+0.1299E         , rs =  5.8151     , as =  0.36   
     Vso= 10.99                 , rso=  6.0583     , 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        1.0392          2  +           0.16          
            2        1.2154          0  +                         
            3        1.7079          2  +           0.12          
            4        2.1534          4  +                         
            5        2.1574          2  +           0.12          
            6        2.3069          0  +                         
            7        2.4515          3  +                         
            8        2.5358          2  +                         
            9        2.5614          3  -           0.11          
           10        2.8067          4  +                         
           11        2.8877          0  +                         
           12        2.9452          2  +           0.11          
           13        3.0468          3  +                         
           14        3.0588          4  +                         
           15        3.1070          0  +                         
           16        3.1810          2  +                         
           17        3.1942          4  +                         
           18        3.2420          1  +                         
           19        3.2966          3  +                         
           20        3.2973          6  +                         
           21        3.3718          3  +                         
           22        3.4165          5  -                         
           23        3.4230          2  +           0.11          
           24        4.0000          2  +           0.11(dummy)   
      Levels above 3.43 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- 70      Ge- 71             
                                 --------    --------             
          a (1/MeV)                13.430      13.600             
          spin cut-off param.       9.088       9.232             
          pairing energy (MeV)      2.860       1.360             
          normalization factor    1780.00     1828.30             
          e-joint (MeV)             8.234       8.064             
                                                                  
  The capture cross section was adjusted to 45 millibarns at      
  200 keV/5/.                                                     
  Above 1MeV, direct/semidirect capture cross section normalized  
  to 0.77mb at 14MeV, were added to casthy's results/6/.          
                                                                  
  mt=16,22,28,103,104,105,106,107,111                             
     (n,2n),(n,na),(n,np),(n,p),(n,d),(n,t),(n,He-3),             
     (n,a),(n,2p)                                                 
  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 the following data.                           
     (n,2n)      500.0    mb    Konno's exp. data/12/             
     (n,np)       48.0    mb    systematics/13/                   
     (n,p)        96.0    mb    av. of /14/,/15/ and /16/         
     (n,d)         7.9    mb    systematics                       
     (n,a)        30.0    mb    systematics                       
                                                                  
mf=4  Angular distributions of secondary neutrons                 
  mt=2,16,22,28,51-74,91                                          
  Elastic and inelastic scattering cross section,(n,2n),(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/17/. Deformation parameters used in dwucky      
  calcualtion were evaluated from compilations/18,19/ and         
  ensdf half life data and adjusted to reproduce                  
  ddx data/20/.                                                   
  As for (n,2n),(n,na),(n,np) and (n,nd),isotropic distribution   
  was assumed.                                                    
                                                                  
mf=5  Energy distributions of secondary neutrons                  
  mt=16,22,28,91                                                  
  For (n,2n),(n,na),(n,np) and continum inelstic scattering       
  secondary neutron energy distribution was 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)G. Walters               KfK-3706(1984)                        
 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)C. Konno   et.al.        JAERI-1329(1993)                      
13)R.A. Forrest             AERE-R 12419(1986)                    
14)H.M. Hoang et al         ZP.A342,283(1992)                     
15)J.L. Casanova et al.     ARS,72,(3),186(1976)                  
16)G.P. Vinitskaya et al.   NESTOR list                           
17)N. Yamamuro              JAERI-M 88-140(1988)                  
18)S. Raman et al.          AND 42,1(1989)                        
19)R.H. Spear               AND 42,55(1989)                       
20)A. Takahashi et.al.      Oktavian data private com.