32-Ge- 72

 32-GE- 72 KHI        EVAL-MAR94 T.WATANABE                       
                      DIST-MAR02 REV2-JUL01            20010713   
----JENDL-3.3         MATERIAL 3231                               
-----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 40keV )   
  Negative energy level parameters were adjusted to reproduce     
  Koesters 2200m/s data/1/.                                       
  Level 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           9.91                     -                  
      elastic         9.1                      -                 3
      capture         0.81                    0.87                
                                                                  
mf=3  Neutron cross sections                                      
  Below  40 keV, resonance parameters were given.                 
  Above  40 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 =  5.092      , a0 =  0.492  
     Ws = 9.997+0.1299E         , rs =  5.87       , as =  0.36   
     Vso= 10.99                 , rso=  6.1154     , 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        0.6916          0  +                         
            2        0.8341          2  +          0.16           
            3        1.4641          2  +          0.12           
            4        1.7284          4  +                         
            5        2.0290          0  +                         
            6        2.0490          0  +                         
            7        2.0650          3  +                         
            8        2.3962          1  +                         
            9        2.4024          2  +          0.12           
           10        2.4640          4  +                         
           11        2.5149          3  -          0.11           
           12        2.5835          1  +                         
           13        2.7544          0  +                         
           14        2.7722          6  +                         
           15        2.8757          2  +                         
           16        2.8970          0  +                         
           17        2.9401          1  -                         
           18        2.9436          3  -                         
           19        2.9504          1  +                         
           20        3.0340          2  +                         
           21        3.0358          2  -                         
           22        3.0805          4  +                         
           23        3.0942          2  +          0.11           
           24        3.1290          5  -                         
           25        3.5000          2  +          0.11(dummy)    
           26        4.0000          2  +          0.11(dummy)    
      Levels above 3.26 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- 72      Ge- 73             
                                 --------    --------             
          a (1/MeV)                15.020      14.970             
          spin cut-off param.       9.793       9.867             
          pairing energy (MeV)      2.790       1.360             
          normalization factor    2047.70     2069.20             
          E-joint (MeV)             7.841       7.828             
                                                                  
  The capture cross section was normalized using Do=962 eV and    
  Gg=0.162 eV adopted from Mughabghabs compilation/2/.            
  Above 1 MeV, direct/semidirect capture cross section normalized 
  to 0.76mb at 14 MeV were added to casthy's results/5/.          
                                                                  
  mt=16,17,22,28,32,103,104,105,106,107                           
     (n,2n),(n,3n),(n,na),(n,np),(n,nd),(n,p),(n,d),(n,t),        
     (n,He-3),(n,a)                                               
  were evaluated with modified egnash-2/6/ using f2=1.4 and       
  following optical potential                                     
     neutron   :same as used in casthy                            
     proton    :Perey's omp/7/                                    
     deutron   :Lohr-Haeberli's omp/8/                            
     triton    :Becchetti-Greenless omp/9/                        
     he-3      :Becchetti-Greenless omp/9/                        
     alpha     :Lemos omp/10/                                     
  and normalized to following data.                               
     (n,na)      1.6    mb      systematics/11/                   
     (n,np)      5.7    mb      systematics                       
     (n,p)      33.4    mb      av.exp.data/12,13/                
     (n,d)       5.3    mb      systematics                       
     (n,t)       0.026  mb      systematics                       
     (n,a)      14.0    mb      av. exp. data/13,14/              
                                                                  
mf=4  Angular distributions of secondary neutrons                 
  mt=2,16,22,28,32,51-76,91                                       
  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.  The direct      
  inelastic scattering contribution were evaluated with           
  dwucky programm/15/. Deformation parameters used in dwucky      
  calcualtion were evaluated from compilations/16,17/ and         
  ensdf half life data and adjusted to reproduce                  
  ddx data/18/.                                                   
  As for (n,2n),(n,na),(n,np) and (n,nd),isotropic distribution   
  was assumed.                                                    
                                                                  
mf=5  Energy distributions of secondary neutrons                  
  mt=16,22,28,32,91                                               
  For (n,2n),(n,na),(n,np),(n,nd) 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)T. Nakagawa              Capdir manual                         
 6)N. Yamamuro              JAERI-M 90-006(1991)                  
 7)F.G. Perey               PR    131, 745(1963)                  
 8)J.M. Lohr, W. Haeberli   NP   A232, 381(1974)                  
 9)F.D. Becchetti  and      Polarization Phenomena in Nuclear     
     G.W. Greenless         Reaction 682(1971) Univ. Wisconsin    
10)O.F. Lemos               Orsay Rep.Ser.A No.136(1972)          
11)R.A. Forrest             AERE-R 12419(1986)                    
12)R. Rieppo et al.         JIN 38,1927(1976)                     
13)J.L. Casanova et al.     ARS 72,186(1976)                      
14)G.P. Vinitskaya et al.   Vinitskaya (1968) acc.no.=40009012    
15)N. Yamamuro              JAERI-M 88-140(1988)                  
16)S. Raman et al.          AND 42,1(1989)                        
17)R.H. Spear               AND 42,55(1989)                       
18)A. Takahashi et.al.      Okatvian data private com.