62-Sm-151

 62-SM-151 JNDC       EVAL-MAR90 JNDC FP NUCLEAR DATA W.G.        
                      DIST-MAR02 REV2-FEB02            20020222   
----JENDL-3.3         MATERIAL 6246                               
-----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/.                       
                                                                  
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 0.2461 KEV     
    RESONANCE PARAMETERS WERE EVALUATED BY KIKUCHI ET AL./3/ FOR  
    JENDL-2, AND TOTAL SPIN J WAS MODIFIED WITH A RANDOM NUMBER   
    METHOD FOR JENDL-3.                                           
      NEUTRON WIDTHS WERE OBTAINED BY AVERAGING THE DATA OF       
    PATTENDEN/4/, KIROUAC AND EILAND/5/ AND ANUFRIEV ET AL./6/    
    RADIATION WIDTHS WERE TAKEN FROM REF./5/ OR THE AVERAGE VALUE 
    OF 0.065+-0.015 EV WAS ADOPTED.  A NEGATIVE RESONANCE WAS     
    ADDED AT -0.12 EV SO AS TO REPRODUCE THE THERMAL CAPTURE AND  
    TOTAL CROSS SECTIONS GIVEN BY MUGHABGHAB/7/.                  
                                                                  
  UNRESOLVED RESONANCE REGION : 0.2461 KEV - 100 KEV              
    THE NEUTRON STRENGTH FUNCTION S0 WAS BASED ON THE COMPILATION 
    OF MUGHABGHAB, AND S1 AND S2 WERE CALCULATED WITH THE OPTICAL 
    MODEL CODE CASTHY/8/.  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 COMPILATION OF        
    MUGHABGHAB.                                                   
                                                                  
  TYPICAL VALUES OF THE PARAMETERS AT 70 KEV:                     
    S0 = 4.200E-4, S1 = 1.400E-4, S2 = 2.300E-4, SG = 481.E-4,    
    GG = 0.092 EV, R  = 5.720 FM.                                 
                                                                  
  CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS (BARNS)   
                     2200 M/S               RES. INTEG.           
      TOTAL       15210                        -                  
      ELASTIC        50.41                     -                  
      CAPTURE     15160                      3410                 
                                                                  
MF = 3  NEUTRON CROSS SECTIONS                                    
  BELOW 100 KEV, RESONANCE PARAMETERS WERE GIVEN.                 
  ABOVE 100 KEV, THE SPHERICAL OPTICAL AND STATISTICAL MODEL      
  CALCULATION WAS PERFORMED WITH CASTHY/8/, BY TAKING ACCOUNT OF  
  COMPETING REACTIONS, OF WHICH CROSS SECTIONS WERE CALCULATED    
  WITH PEGASUS/9/ STANDING ON A PREEQUILIBRIUM AND MULTI-STEP     
  EVAPORATION MODEL.  THE OMP'S FOR NEUTRON GIVEN IN TABLE 1 WERE 
  DETERMINED TO REPRODUCE THE TOTAL CROSS SECTION OF NATURAL SM   
  MEASURED BY FOSTER AND GLASGOW/10/, KELLIE ET AL./11/ AND SO ON.
  THE OMP'S FOR CHARGED PARTICLES ARE AS FOLLOWS:                 
     PROTON   = PEREY/12/                                         
     ALPHA    = HUIZENGA AND IGO/13/                              
     DEUTERON = LOHR AND HAEBERLI/14/                             
     HELIUM-3 AND TRITON = BECCHETTI AND GREENLEES/15/            
  PARAMETERS FOR THE COMPOSITE LEVEL DENSITY FORMULA OF GILBERT   
  AND CAMERON/16/ WERE EVALUATED BY IIJIMA ET AL./17/  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
  /18/.                                                           
                                                                  
  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./19/.           
                                                                  
           NO.      ENERGY(MEV)    SPIN-PARITY                    
           GR.       0.0            5/2 -                         
            1        0.0048         3/2 -                         
            2        0.0658         7/2 -                         
            3        0.0697         5/2 -                         
            4        0.0915         9/2 +                         
            5        0.1048         3/2 -                         
            6        0.1479        13/2 +                         
            7        0.1677         5/2 +                         
            8        0.1684         5/2 -                         
            9        0.1754         9/2 -                         
           10        0.2090         7/2 -                         
           11        0.2611        11/2 -                         
           12        0.2850         1/2 -                         
           13        0.2946         9/2 -                         
           14        0.3026         5/2 -                         
           15        0.3068         3/2 +                         
           16        0.3138         1/2 -                         
           17        0.3153         3/2 -                         
           18        0.3239         7/2 +                         
           19        0.3449         3/2 +                         
           20        0.3576         1/2 +                         
      LEVELS ABOVE 0.37 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/20/ AND NORMALIZED TO 1 MILLI-BARN AT 14 MEV.       
                                                                  
    THE GAMMA-RAY STRENGTH FUNCTION (5.57E-02) WAS DETERMINED FROM
    THE SYSTEMATICS.                                              
                                                                  
  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 = 32  (N,N'D) CROSS SECTION                                  
  MT = 33  (N,N'T) 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 (=  25.0) WAS ASSUMED TO BE THE SAME 
    AS THAT OF SM-148.                                            
                                                                  
    FINALLY, THE (N,P) AND (N,ALPHA) CROSS SECTIONS WERE          
    NORMALIZED TO THE FOLLOWING VALUES AT 14.5 MEV:               
      (N,P)          4.83  MB (SYSTEMATICS OF FORREST/21/)        
      (N,ALPHA)      1.90  MB (SYSTEMATICS OF FORREST)            
                                                                  
  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.  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 FROM OVERLAPPING LEVELS AND FOR
  OTHER NEUTRON EMITTING REACTIONS.                               
                                                                  
TABLE 1  NEUTRON OPTICAL POTENTIAL PARAMETERS                     
                                                                  
                DEPTH (MEV)       RADIUS(FM)    DIFFUSENESS(FM)   
         ----------------------   ------------  ---------------   
        V  = 46.96-0.0172E        R0 = 6.337    A0 = 0.655        
        WS = 8.455                RS = 7.668    AS = 0.448        
        VSO= 7.0                  RSO= 6.816    ASO= 0.6          
  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    
 ---------------------------------------------------------------  
 60-ND-147     2.398E+01 4.850E-01 5.510E+00 5.235E+00 1.180E+00  
 60-ND-148     2.359E+01 5.150E-01 1.328E+00 6.751E+00 2.170E+00  
 60-ND-149     2.657E+01 4.750E-01 1.192E+01 5.636E+00 1.180E+00  
 60-ND-150     2.415E+01 5.280E-01 1.867E+00 7.314E+00 2.290E+00  
                                                                  
 61-PM-148     2.227E+01 4.300E-01 1.420E+01 2.672E+00 0.0        
 61-PM-149     2.377E+01 4.890E-01 8.141E+00 5.075E+00 9.900E-01  
 61-PM-150     2.270E+01 3.800E-01 7.943E+00 1.973E+00 0.0        
 61-PM-151     2.882E+01 4.260E-01 8.842E+00 4.956E+00 1.110E+00  
                                                                  
 62-SM-149     2.325E+01 5.052E-01 5.886E+00 5.504E+00 1.220E+00  
 62-SM-150     2.362E+01 5.230E-01 1.520E+00 6.973E+00 2.210E+00  
 62-SM-151     2.687E+01 5.000E-01 2.313E+01 6.327E+00 1.220E+00  
 62-SM-152     2.375E+01 5.470E-01 2.365E+00 7.669E+00 2.330E+00  
 ---------------------------------------------------------------  
                                                                  
  SPIN CUTOFF PARAMS WERE CALCULATED AS 0.146*SQRT(A)*A**(2/3).   
  IN THE CASTHY CALCULATION, SPIN CUTOFF FACTORS AT 0 MEV WERE    
  ASSUMED TO BE 6.675 FOR SM-151 AND 5.306 FOR SM-152.            
                                                                  
REFERENCES                                                        
 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) KIKUCHI, Y. ET AL.: JAERI-M 86-030 (1986).                    
 4) PATTENDEN, N.J.: NUCL. SCI. ENG., 17, 371 (1963).             
 5) KIROUAC, G.J., EILAND, H.M.: PHYS. REV., C11, 895 (1975).     
 6) ANUFRIEV, V.A., ET AL.: PROC. 4TH ALL UNION CONF. ON NEUTRON  
    PHYSICS, KIEV 1977, VOL. 2, 263.                              
 7) MUGHABGHAB, S.F.: "NEUTRON CROSS SECTIONS, VOL. I, PART B",   
    ACADEMIC PRESS (1984).                                        
 8) IGARASI, S.: J. NUCL. SCI. TECHNOL., 12, 67 (1975).           
 9) IIJIMA, S. ET AL.: JAERI-M 87-025, P. 337 (1987).             
10) FOSTER, D.G. JR. AND GLASGOW, D.W.: PHYS. REV., C3, 576       
    (1971).                                                       
11) KELLIE, J.D., HALL, S.J. AND CRAWFORD, G.I. ET AL.:           
    J. PHYS., A7, 1758 (1974).                                    
12) PEREY, F.G: PHYS. REV. 131, 745 (1963).                       
13) HUIZENGA, J.R. AND IGO, G.: NUCL. PHYS. 29, 462 (1962).       
14) LOHR, J.M. AND HAEBERLI, W.: NUCL. PHYS. A232, 381 (1974).    
15) 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).                                                       
16) GILBERT, A. AND CAMERON, A.G.W.: CAN. J. PHYS., 43, 1446      
    (1965).                                                       
17) IIJIMA, S., ET AL.: J. NUCL. SCI. TECHNOL. 21, 10 (1984).     
18) GRUPPELAAR, H.: ECN-13 (1977).                                
19) LEDERER, C.M., ET AL.: "TABLE OF ISOTOPES, 7TH ED.", WILEY-   
    INTERSCIENCE PUBLICATION (1978).                              
20) BENZI, V. AND REFFO, G.: CCDN-NW/10 (1969).                   
21) FORREST, R.A.: AERE-R 12419 (1986).