52-Te-128 JNDC       EVAL-MAR90 JNDC FP NUCLEAR DATA W.G.        
                      DIST-MAY10                       20091216   
----JENDL-4.0         MATERIAL 5249                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
   JENDL-3.2 data were automatically transformed to JENDL-3.3.    
    Interpolation of spectra: 22 (unit base interpolation)        
    (3,251) deleted, T-matrix of (4,2) deleted, and others.       
84-10 Evaluation for JENDL-2 was made by JNDC FPND W.G./1/        
90-03 Modification for JENDL-3 was made/2/.                       
09-12 Compiled by A.Ichihara.                                     
     *****   modified parts for JENDL-4.0   ********************  
      (2,151)       Resolved resonance parameters were revised    
                    by K.Shibata.                                 
mf = 1  General information                                       
  mt=451 Comments and dictionary                                  
mf = 2  Resonance parameters                                      
  mt=151 Resolved and unresolved resonance parameters             
  Resolved resonance region (MLBW formula) : below 8 keV          
    Neutron widths were adopted from experimental data of         
    Tellier et al./3/, and radiative capture widths from          
    capture areas measured by Browne and Berman/4/.  For the      
    resonances above 7 keV, the average radiation width of 0.048  
    +-0.025 eV was assumed.  A negative resonance was added at    
    -600 eV so as to reproduce the thermal capture cross section  
    of 0.215+-0.008 barns/5/.  The effective scattering radius    
    of 5.5 fm was taken from ref./5/                              
    In JENDL-4, the radiation width of the negative resonance     
    was changed to 166.4 meV so as to reproduce the thermal       
    capture cross section measured by Wirth et al./6/             
  Unresolved resonance region : 8 keV - 100 keV                   
    The neutron strength function S0 was based on the compilation 
    of Mughabghab et al./5/, and S1 and S2 were calculated with   
    optical model code CASTHY/7/.  The observed level spacing was 
    determined to reproduce the capture cross section calculated  
    with CASTHY.  The effective scattering radius was obtained    
    from fitting to the calculated total cross section at 100 keV.
    The radiation width Gg was based on the systematics of        
    measured values for neighboring nuclides.                     
  Typical values of the parameters at 70 keV:                     
    S0 = 0.250e-4, S1 = 1.700e-4, S2 = 1.000e-4, Sg = 0.540e-4,   
    Gg = 0.150 eV, R  = 5.897 fm.                                 
    The unresolved resonance parameters should be used only for   
    self-shielding calculation.                                   
    Thermal cross sections and resonance integrals at 300 K       
                     0.0253 eV           res. integ. (*)          
                      (barns)              (barns)                
     Total            4.302E+00                                   
     Elastic          4.115E+00                                   
     n,gamma          1.861E-01             1.29E+00              
       (*) Integrated from 0.5 eV to 10 MeV.                      
mf = 3  Neutron cross sections                                    
  Below 8 keV, resolved resonance parameters were given.          
  The spherical optical and statistical model                     
  calculation was performed with CASTHY, by taking account of     
  competing reactions, of which cross sections were calculated    
  with PEGASUS/8/ standing on a preequilibrium and multi-step     
  evaporation model.  The OMP's for neutron given in Table 1 were 
  determined to reproduce a systematic trend of the total cross   
  section by changing r0 and rso of Iijima-Kawai potential/9/.    
  The OMP's for charged particles are as follows:                 
     proton   = Perey/10/                                         
     alpha    = Huizenga and Igo/11/                              
     deuteron = Lohr and Haeberli/12/                             
     helium-3 and triton = Becchetti and Greenlees/13/            
  Parameters for the composite level density formula of Gilbert   
  and Cameron/14/ were evaluated by Iijima et al./15/   More      
  extensive determination and modification were made in the       
  present work.  Table 2 shows the level density parameters used  
  in the present calculation.  Energy dependence of spin cut-off  
  parameter in the energy range below E-joint is due to Gruppelaar
  mt = 1  Total                                                   
    Spherical optical model calculation was adopted.              
  mt = 2  Elastic scattering                                      
    Calculated as (total - sum of partial cross sections).        
  mt = 4, 51 - 91  Inelastic scattering                           
    Spherical optical and statistical model calculation was       
    adopted.  The level scheme was taken from Ref./17/.           
           no.      energy(MeV)    spin-parity                    
           gr.       0.0             0  +                         
            1        0.7432          2  +                         
            2        1.4971          4  +                         
            3        1.5232          2  +                         
            4        1.8111          6  +                         
            5        1.9722          2  +                         
            6        1.9822          0  +                         
            7        2.0300          4  +                         
            8        2.1320          2  +                         
            9        2.1335          5  -                         
      Levels above 2.197 MeV were assumed to be overlapping.      
  mt = 102  Capture                                               
    Spherical optical and statistical model calculation with      
    CASTHY was adopted.  Direct and semi-direct capture cross     
    sections were estimated according to the procedure of Benzi   
    and Reffo/18/ and normalized to 1 milli-barn at 14 MeV.       
    The gamma-ray strength function (4.85e-05) was adjusted to    
    reproduce the capture cross section of 48 milli-barns at 20   
    keV measured by Bergman and Romanov/19/.                      
  mt = 16  (n,2n) cross section                                   
  mt = 17  (n,3n) cross section                                   
  mt = 22  (n,n'a) cross section                                  
  mt = 28  (n,n'p) cross section                                  
  mt =103  (n,p) cross section                                    
  mt =104  (n,d) cross section                                    
  mt =105  (n,t) cross section                                    
  mt =107  (n,alpha) cross section                                
    These reaction cross sections were calculated with the        
    preequilibrium and multi-step evaporation model code PEGASUS. 
    The Kalbach's constant k (= 116.8) was estimated by the       
    formula derived from Kikuchi-Kawai's formalism/20/ and level  
    density parameters.                                           
    Finally, the (n,p) and (n,alpha) cross sections were          
    normalized to the following values at 14.5 MeV:               
      (n,p)          2.40  mb (recommended by Forrest/21/)        
      (n,alpha)      0.95  mb (recommended by Forrest)            
  mt = 251  mu-bar                                                
    Calculated with CASTHY/7/.                                    
mf = 4  Angular distributions of secondary neutrons               
  Legendre polynomial coefficients for angular distributions are  
  given in the center-of-mass system for mt=2 and discrete inelas-
  tic levels, and in the laboratory system for mt=91.  They were  
  calculated with CASTHY.  For other reactions, isotropic distri- 
  butions in the laboratory system were assumed.                  
mf = 5  Energy distributions of secondary neutrons                
  Energy distributions of secondary neutrons were calculated with 
  PEGASUS for inelastic scattering to overlapping levels and for  
  other neutron emitting reactions.                               
                DEPTH (MEV)       RADIUS(FM)    DIFFUSENESS(FM)   
         ----------------------   ------------  ---------------   
        V  = 45.97-0.199E         R0 = 6.481    A0 = 0.62         
        WS = 6.502                RS = 6.926    AS = 0.35         
        VSO= 7.0                  RSO= 6.49     ASO= 0.62         
TABLE 2  LEVEL DENSITY PARAMETERS                                 
 NUCLIDE       A(1/MEV)  T(MEV)    C(1/MEV)  EX(MEV)   PAIRING    
 50-SN-124     1.601E+01 6.160E-01 3.224E-01 6.294E+00 2.280E+00  
 50-SN-125     1.591E+01 6.210E-01 1.927E+00 5.249E+00 1.190E+00  
 50-SN-126     1.646E+01 6.270E-01 4.012E-01 6.778E+00 2.390E+00  
 50-SN-127     1.577E+01 6.140E-01 1.633E+00 5.075E+00 1.190E+00  
 51-SB-125     1.700E+01 5.120E-01 7.883E-01 3.792E+00 1.090E+00  
 51-SB-126     1.700E+01 5.250E-01 7.566E+00 2.897E+00 0.0        
 51-SB-127     1.700E+01 5.120E-01 6.326E-01 3.902E+00 1.200E+00  
 51-SB-128     1.468E+01 5.600E-01 4.264E+00 2.658E+00 0.0        
 52-TE-126     1.706E+01 6.100E-01 5.154E-01 6.554E+00 2.230E+00  
 52-TE-127     2.004E+01 5.380E-01 3.633E+00 5.165E+00 1.140E+00  
 52-TE-128     1.800E+01 6.090E-01 6.586E-01 7.010E+00 2.340E+00  
 52-TE-129     2.015E+01 5.350E-01 3.588E+00 5.141E+00 1.140E+00  
 Spin cutoff parameters were calculated as 0.146*sqrt(a)*a**(2/3).
 In the CASTHY calculation, spin cutoff factors at 0 MeV were     
 assumed to be 7.680 for Te-128 and 5.913 for Te-129.             
 1) Aoki, T. et al.: Proc. Int. Conf. on Nuclear Data for Basic   
    and Applied Science, Santa Fe., Vol. 2, p.1627 (1985).        
 2) Kawai, M. et al.: Proc. Int. Conf. on Nuclear Data for Science
    and Technology, Mito, p. 569 (1988).                          
 3) Tellier, H., et al.: CEA-N-1268 (1970).                       
 4) Browne, J.C., Berman, B.L.: Phys. Rev., C8, 2405 (1973).      
 5) Mughabghab, S.F. et al.: "Neutron Cross Sections, Vol. I,     
    Part A", Academic Press (1981).                               
 6) Wirth, H.-F. et al.: Nucl. Phys., A716, 3 (2003).             
 7) Igarasi, S.: J. Nucl. Sci. Technol., 12, 67 (1975).           
 8) Iijima, S. et al.: JAERI-M 87-025, p. 337 (1987).             
 9) Iijima, S. and Kawai, M.: J. Nucl. Sci. Technol., 20, 77      
10) Perey, F.G: Phys. Rev. 131, 745 (1963).                       
11) Huizenga, J.R. and Igo, G.: Nucl. Phys. 29, 462 (1962).       
12) Lohr, J.M. and Haeberli, W.: Nucl. Phys. A232, 381 (1974).    
13) Becchetti, F.D., Jr. and Greenlees, G.W.: Polarization        
    Phenomena in Nuclear Reactions ((Eds) H.H. Barshall and       
    W. Haeberli), p. 682, the University of Wisconsin Press.      
14) Gilbert, A. and Cameron, A.G.W.: Can. J. Phys., 43, 1446      
15) Iijima, S., et al.: J. Nucl. Sci. Technol. 21, 10 (1984).     
16) Gruppelaar, H.: ECN-13 (1977).                                
17) Matsumoto, J.: private communication (1981).                  
18) Benzi, V. and Reffo, G.: CCDN-NW/10 (1969).                   
19) Bergman, A.A. and Romanov, S.A.: Yadernaya Fizika, 20, 252    
20) Kikuchi, K. and Kawai, M.: "Nuclear Matter and Nuclear        
    Reactions", North Holland (1968).                             
21) Forrest, R.A.: AERE-R 12419 (1986).