44-Ru-102

 44-Ru-102 JNDC       EVAL-MAR90 JNDC FP NUCLEAR DATA W.G.        
                      DIST-MAY10                       20091209   
----JENDL-4.0         MATERIAL 4443                               
-----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.       
   ===========================================================    
                                                                  
History                                                           
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 JENDL-4.0.                                                  
      Compiled by A.Ichihara (jaea/ndc).                          
      *****   modified parts for JENDL-4.0   *******************  
      (2,151)      Resolved resonance parameters were revised     
                   by T.Nakagawa.                                 
      (2,151)      Unresolved resonance parameters were updated.  
      **********************************************************  
                                                                  
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 13.4 keV       
                                                                  
    JENDL-3.3 was adopted, and parameters of a negative resonance 
    were modified so as to repruduce the thermal total cross      
    setion of 10.4+-0.6 b/3/, capture cross section of 1.48+-     
    0.16 b/4,5,6/. The data of Ishikawa/5/ was                    
    multiplied by a factor of 1.26, because standard cross section
    of Ru-96(n,g) has changed from 0.21 b to 0.27 b.  Scattering  
    radius of 6.6 fm was assumed from its systematics/7/.         
                                                                  
    ** comments to JENDL-3.3 **                                   
    Resonance parameters of JENDL-2/1/ were modified according    
    to new experimental data.                                     
       For JENDL-2, resonance energies below 2.5 keV were taken   
    from the data of Priesmeyer and Jung/8/ and Shaw et al./9/,   
    and for the other resonances above 2.7 keV from Macklin and   
    Halperin/10/.  The neutron and radiation widths of large      
    resonances were taken from Priesmeyer and Jung/8/ and Macklin 
    and Halperin/10/.  For others, the average radiation width of 
    0.112+-0.027 eV was adopted.  For levels observed by Shaw et  
    al. and for three fictitious levels at 2.467, 2.556 and 2.645 
    keV, the parameters were determined by assuming S0=0.43e-4,   
    D0=340 ev, S1=4.1e-4 and D1=110 eV.  Parameters of the        
    negative level added at -146 eV and the first positive level  
    were adjusted to reproduce the capture cross section of 1.21  
    +-0.07 barns at 0.0253 eV and its resonance integral of 4.2   
    +-0.1 barns/11/.                                              
       For JENDL-3, neutron and radiation widths of 14 resonances 
    were reevaluated on the basis of the experimental data of     
    Anufriev et al./12/  For the resonances observed by Shaw et   
    al., reduced neutron widths were given as 6.5 meV and 65 meV  
    for s-wave and p-wave resonances, respectively.  Parameters of
    the negative resonance were also revise.  Scattering radius   
    was modified from 6.35 fm to 6.1 fm based on the systematics. 
    Neutron orbital angular momentum L of some resonances was     
    estimated with a method of Bollinger and Thomas/13/.          
                                                                  
  Unresolved resonance region : 13.4 keV - 300 keV                
    Unresolved resonance parameters were adopted from JENDL-2.    
    The neutron strength functions, S0, S1 and S2 were calculated 
    with optical model code CASTHY/14/.  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.                                                      
                                                                  
  Typical values of the parameters at 70 keV:                     
    S0 = 0.450e-4, S1 = 5.000e-4, S2 = 0.530e-4, Sg = 3.61e-4,    
    Gg = 0.115 eV, R  = 5.756 fm.                                 
                                                                  
    The unresolved resonance parameters were calculated using     
    the ASREP code/15/.                                           
    The parameters should be used only for self-shielding         
    calculation.                                                  
                                                                  
    Thermal cross sections and resonance integrals at 300K (b)    
    -------------------------------------------------------       
                    0.0253 eV    reson. integ.(*)                 
    -------------------------------------------------------       
    total           10.408                                        
    elastic          8.932                                        
    capture          1.475          4.41                          
    -------------------------------------------------------       
         (*) In the energy range from 0.5 eV to 10 MeV.           
                                                                  
mf = 3  Neutron cross sections                                    
  Below 13.4 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/16/ 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 rso of Iijima-Kawai potential/17/.  The     
  OMP's for charged particles are as follows:                     
     proton   = Perey/18/                                         
     alpha    = Huizenga and Igo/19/                              
     deuteron = Lohr and Haeberli/20/                             
     helium-3 and triton = Becchetti and Greenlees/21/            
  Parameters for the composite level density formula of Gilbert   
  and Cameron/22/ were evaluated by Iijima et al./23/  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
  /24/.                                                           
                                                                  
  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./25/.           
                                                                  
           no.      energy(MeV)    spin-parity    dwba cal.       
           gr.       0.0             0  +                         
            1        0.4751          2  +             *           
            2        0.9437          0  +                         
            3        1.1032          2  +                         
            4        1.1064          4  +                         
            5        1.5217          3  +                         
            6        1.5806          2  +                         
            7        1.6027          4  +                         
            8        1.7987          4  +                         
            9        1.8371          0  +                         
           10        1.8732          6  +                         
           11        2.0369          2  +                         
           12        2.0442          3  -             *           
           13        2.2192          5  +                         
           14        2.2612          2  +                         
           15        2.3720          5  -                         
           16        2.4211          4  +                         
           17        2.4419          4  +                         
      Levels above 2.5 MeV were assumed to be overlapping.        
                                                                  
    For the levels with an asterisk, the contribution of direct   
    inelastic scattering cross sections was calculated by the     
    DWUCK-4 code/26/.  Deformation parameters (beta2 = 0.2443 and 
    beta3 = 0.196) were based on the data compiled by Raman et    
    al./27/ and Spear/28/, respectively.                          
                                                                  
  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/29/ and normalized to 1 milli-barn at 14 MeV.       
                                                                  
    The gamma-ray strength function (3.44e-04) was adjusted to    
    reproduce the capture cross section of 110 milli-barns at 70  
    keV measured by Macklin et al./30,31/                         
                                                                  
  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 (=  72.0) was estimated by the       
    formula derived from Kikuchi-Kawai's formalism/32/ 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)         16.70  mb (systematics of Forrest/33/)        
      (n,alpha)      6.20  mb (recommended by Forrest/33/)        
                                                                  
  mt = 251  mu-bar                                                
    Calculated with CASTHY.                                       
                                                                  
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.  Contribution of direct inelastic       
  scattering was calculated with DWUCK-4.  For other reactions,   
  isotropic distributions 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 from overlapping levels and for
  other neutron emitting reactions.                               
                                                                  
TABLE 1  NEUTRON OPTICAL POTENTIAL PARAMETERS                     
                                                                  
                DEPTH (MEV)       RADIUS(FM)    DIFFUSENESS(FM)   
         ----------------------   ------------  ---------------   
        V  = 47.5                 R0 = 5.972    A0 = 0.62         
        WS = 9.74                 RS = 6.594    AS = 0.35         
        VSO= 7.0                  RSO= 5.97     ASO= 0.62         
  THE FORM OF SURFACE ABSORPTION PART IS DER. WOODS-SAXON TYPE.   
                                                                  
TABLE 2  LEVEL DENSITY PARAMETERS                                 
                                                                  
 NUCLIDE       A(1/MEV)  T(MEV)    C(1/MEV)  EX(MEV)   PAIRING    
 ---------------------------------------------------------------  
 42-MO- 98     1.594E+01 6.900E-01 7.358E-01 7.888E+00 2.570E+00  
 42-MO- 99     1.774E+01 6.200E-01 4.294E+00 6.058E+00 1.280E+00  
 42-MO-100     1.780E+01 6.000E-01 6.702E-01 6.645E+00 2.220E+00  
 42-MO-101     2.085E+01 5.650E-01 7.153E+00 6.092E+00 1.280E+00  
                                                                  
 43-TC- 99     1.600E+01 6.550E-01 2.973E+00 5.984E+00 1.290E+00  
 43-TC-100     1.637E+01 5.850E-01 1.189E+01 3.635E+00 0.0        
 43-TC-101     1.675E+01 6.440E-01 6.361E+00 5.761E+00 9.400E-01  
 43-TC-102     1.761E+01 5.400E-01 1.217E+01 3.317E+00 0.0        
                                                                  
 44-RU-100     1.520E+01 7.200E-01 7.835E-01 8.078E+00 2.570E+00  
 44-RU-101     1.726E+01 6.700E-01 7.228E+00 6.836E+00 1.280E+00  
 44-RU-102     1.643E+01 6.550E-01 8.872E-01 7.106E+00 2.220E+00  
 44-RU-103     1.890E+01 6.480E-01 1.210E+01 7.110E+00 1.280E+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 7.654 for Ru-102 and 5.045 for Ru-103.             
                                                                  
References                                                        
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    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) V.A.Anufriev et al.: Sov. At. Energy, 58, 326 (1985).         
 4) P.M.Lantz: ORNL 3832, p.6 (1965).                             
 5) H.Ishikawa: J. Nucl. Sci. Technol., 6, 587 (1969).            
 6) R.E.Heft: 1978 MAYAG, p.495 (1978).                           
 7) S.F.Mughabghab: "Atlas of Neutron Resonances," Elsevier       
    (2006).                                                       
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 9) R.A.Shaw et al.: Bull. Amer. Phys. Soc., 20, 560 (1975).      
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11) S.F.Mughabghab et al.: "Neutron Cross Sections, Vol. I,       
    Part A", Academic Press (1981).                               
12) V.A.Anufriev et al.: Atom. Energiya, 58, 279 (1985).          
13) L.M.Bollinger, G.E.Thomas: Phys. Rev., 171, 1293 (1968).      
14) Igarasi, S.: J. Nucl. Sci. Technol., 12, 67 (1975).           
15) Y.Kikuchi et al., JAERI-Data/Code 99-025 (1999)               
     [in Japanese].                                               
16) Iijima, S. et al.: JAERI-M 87-025, p. 337 (1987).             
17) Iijima, S. and Kawai, M.: J. Nucl. Sci. Technol., 20, 77      
    (1983).                                                       
18) Perey, F.G: Phys. Rev. 131, 745 (1963).                       
19) Huizenga, J.R. and Igo, G.: Nucl. Phys. 29, 462 (1962).       
20) Lohr, J.M. and Haeberli, W.: Nucl. Phys. A232, 381 (1974).    
21) 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.      
    (1971).                                                       
22) Gilbert, A. and Cameron, A.G.W.: Can. J. Phys., 43, 1446      
    (1965).                                                       
23) Iijima, S., et al.: J. Nucl. Sci. Technol. 21, 10 (1984).     
24) Gruppelaar, H.: ECN-13 (1977).                                
25) Matsumoto, J., et al.: JAERI-M 7734 (1978).                   
26) Kunz, P.D.: private communication.                            
27) Raman, S., et al.: Atom. Data and Nucl. Data Tables 36, 1     
    (1987)                                                        
28) Spear, R.H.: Atom. Data and Nucl. Data Table, 42, 55 (1989).  
29) Benzi, V. and Reffo, G.: CCDN-NW/10 (1969).                   
30) Macklin, R.L., et al.: Proc. Specialists' Meeting on Neutron  
    Cross Sections of Fission Products, Bologna 1979, NEANDC(E)   
    209L, 103.                                                    
31) Macklin, R.L. and Winters, R.R.: Nucl. Sci. Eng., 78, 110     
    (1981).                                                       
32) Kikuchi, K. and Kawai, M.: "Nuclear Matter and Nuclear        
    Reactions", North Holland (1968).                             
33) Forrest, R.A.: AERE-R 12419 (1986).