62-Sm-150

 62-SM-150 JNDC       EVAL-MAR90 JNDC FP NUCLEAR DATA W.G.        
                      DIST-SEP90 REV2-JUN94                       
----JENDL-3.2         MATERIAL 6243                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
HISTORY                                                           
84-10 EVALUATION FOR JENDL-2 WAS MADE BY JNDC FPND W.G./1/        
90-03 MODIFICATION FOR JENDL-3 WAS MADE/2/.                       
94-06 JENDL-3.2 WAS MADE BY JNDC FPND W.G.                        
                                                                  
     *****   MODIFIED PARTS FOR JENDL-3.2   ********************  
      (3,2)        TO KEEP CONSISTENCY OF CROSS SECTIONS          
      (3,4), (3,51), (3,53), (3,55), (3,59)                       
                   DIRECT INELASTIC SCATTERING CONTRIBUTION       
                   WAS INCLUDED.                                  
      (3,102)      RENORMALIZATION TO NEW EXPERIMENTAL DATA. THE  
                   EFFECTS TO INELASTIC SCATTERING CROSS SECTIONS 
                   ABOUT 1 % OR LESS.                             
      (4,51), (4,53), (4,55), (4,59)                              
                   DIRECT INELASTIC SCATTERING CONTRIBUTION       
     ***********************************************************  
                                                                  
                                                                  
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 1.538 KEV      
    RESONANCE PARAMETERS WERE TAKEN FROM JENDL-2 WHICH WAS        
    EVALUATED BY KIKUCHI ET AL./3/ ON THE BASIS OF THE            
    EXPERIMENTAL DATA BY EILAND ET AL./4/ AND BY ANUFRIEV ET      
    AL./5/  THE AVERAGE RADIATION WIDTH OF 0.060 EV WAS ASSUMED.  
    A NEGATIVE RESONANCE WAS ADDED AT -3.5 EV SO AS TO REPRODUCE  
    THE CAPTURE CROSS SECTION OF 107+-9 BARNS AND THE TOTAL CROSS 
    SECTION OF 122+-12 BARNS/4/.                                  
                                                                  
  UNRESOLVED RESONANCE REGION : 1.538 KEV - 100 KEV               
    THE NEUTRON STRENGTH FUNCTION S0 WAS BASED ON THE COMPILATION 
    OF MUGHABGHAB/6/, 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 COMPILATION OF        
    MUGHABGHAB.                                                   
                                                                  
  TYPICAL VALUES OF THE PARAMETERS AT 70 KEV:                     
    S0 = 3.600E-4, S1 = 1.400E-4, S2 = 2.300E-4, SG = 10.98E-4,   
    GG = 0.060 EV, R  = 5.916 FM.                                 
                                                                  
  CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS (BARNS)   
                     2200 M/S               RES. INTEG.           
      TOTAL         116.9                      -                  
      ELASTIC         8.341                    -                  
      CAPTURE       108.6                     325                 
                                                                  
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, 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 THE TOTAL CROSS SECTION OF NATURAL SM   
  MEASURED BY FOSTER AND GLASGOW/9/, KELLIE ET AL./10/ AND SO ON. 
  THE OMP'S FOR CHARGED PARTICLES ARE AS FOLLOWS:                 
     PROTON   = PEREY/11/                                         
     ALPHA    = HUIZENGA AND IGO/12/                              
     DEUTERON = LOHR AND HAEBERLI/13/                             
     HELIUM-3 AND TRITON = BECCHETTI AND GREENLEES/14/            
  PARAMETERS FOR THE COMPOSITE LEVEL DENSITY FORMULA OF GILBERT   
  AND CAMERON/15/ WERE EVALUATED BY IIJIMA ET AL./16/   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
  /17/.                                                           
                                                                  
  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./18/.  THE      
    LEVELS MARKED WITH * INCLUDE THE CONTRIBUTION OF DIRECT       
    INELASTIC SCATTERING, WHICH WAS CALCUALTED BY THE COUPLED-    
    CHANNELS THEORY WITH ECIS88 CODE/19/.   THE GROUND STATE      
    ROTATIONAL BAND (0+ 2+ 4+ 6+(1.27891MEV)) AND OCTUPOLE        
    VIBRATIONAL BAND (3- 1-(1.16573MEV) 5-) WERE COUPLED          
    SIMULTANEOUSLY.  THE WS PARAMETER WAS ADJUSTED TO 3.5 MEV,    
    OTHERWISE THE SPHERICAL PARAMETERS WERE USED.  THE BETA-2 (=  
    0.1931) AND BETA-3 (= 0.14526) WERE TAKEN FROM ORNL           
    COMPILATIONS/20,21/.                                          
                                                                  
           NO.      ENERGY(MEV)    SPIN-PARITY  C.C. CALCULATION  
           GR.       0.0             0  +                         
            1        0.3343          2  +              *          
            2        0.7403          0  +                         
            3        0.7733          4  +              *          
            4        1.0463          2  +                         
            5        1.0720          3  -              *          
            6        1.1650          2  +                         
            7        1.1940          2  +                         
            8        1.2550          0  +                         
            9        1.3570          5  -              *          
           10        1.4170          2  +                         
           11        1.4490          4  +                         
           12        1.5050          3  +                         
           13        1.6430          4  +                         
           14        1.7610          0  +                         
           15        1.7940          2  +                         
           16        1.8200          4  +                         
           17        1.8340          2  +                         
           18        1.9270          2  +                         
           19        1.9510          3  -                         
           20        1.9710          4  +                         
      LEVELS ABOVE 2.006 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/22/ AND NORMALIZED TO 1 MILLI-BARN AT 14 MEV.       
                                                                  
    THE GAMMA-RAY STRENGTH FUNCTION (1.098E-03) WAS ADJUSTED TO   
    REPRODUCE THE CAPTURE CROSS SECTION OF 320 MILLI-BARNS AT 50  
    KEV MEASURED BY WISSHAK ET AL./23/                            
                                                                  
  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)          6.90  MB (RECOMMENDED BY FORREST/24/)        
      (N,ALPHA)      3.40  MB (RECOMMENDED BY FORREST)            
    THE (N,2N) CROSS SECTION WAS DETERMINED BY EYE-GUIDING OF     
    THE DATA MEASURED BY FREHAUT ET AL./25/                       
                                                                  
  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 = 6.323    A0 = 0.655        
        WS = 8.455                RS = 7.651    AS = 0.448        
        VSO= 7.0                  RSO= 6.801    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-146     2.019E+01 5.660E-01 1.121E+00 6.714E+00 2.100E+00  
 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  
                                                                  
 61-PM-147     2.192E+01 4.913E-01 4.801E+00 4.589E+00 9.200E-01  
 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        
                                                                  
 62-SM-148     2.097E+01 5.505E-01 1.055E+00 6.694E+00 2.140E+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  
 ---------------------------------------------------------------  
                                                                  
 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 5.475 FOR SM-150 AND 6.675 FOR SM-151.             
                                                                  
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.: J. NUCL. SCI. TECHNOL., 29, 195 (1992).     
 3) KIKUCHI, Y. ET AL.: JAERI-M 86-030 (1986).                    
 4) EILAND, H.M., ET AL.: NUCL. SCI. ENG., 54, 286 (1974).        
 5) ANUFRIEV, V.A., ET AL.: PROC. 4TH ALL UNION CONF. ON NEUTRON  
    PHYSICS, KIEV 1977, VOL.2, 263.                               
 6) MUGHABGHAB, S.F.: "NEUTRON CROSS SECTIONS, VOL. I, PART B",   
    ACADEMIC PRESS (1984).                                        
 7) IGARASI, S. AND FUKAHORI, T.: JAERI 1321 (1991).              
 8) IIJIMA, S. ET AL.: JAERI-M 87-025, P. 337 (1987).             
 9) FOSTER, D.G. JR. AND GLASGOW, D.W.: PHYS. REV., C3, 576       
    (1971).                                                       
10) KELLIE, J.D., HALL, S.J. AND CRAWFORD, G.I. ET AL.:           
    J. PHYS., A7, 1758 (1974).                                    
11) PEREY, F.G: PHYS. REV. 131, 745 (1963).                       
12) HUIZENGA, J.R. AND IGO, G.: NUCL. PHYS. 29, 462 (1962).       
13) LOHR, J.M. AND HAEBERLI, W.: NUCL. PHYS. A232, 381 (1974).    
14) 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).                                                       
15) GILBERT, A. AND CAMERON, A.G.W.: CAN. J. PHYS., 43, 1446      
    (1965).                                                       
16) IIJIMA, S., ET AL.: J. NUCL. SCI. TECHNOL. 21, 10 (1984).     
17) GRUPPELAAR, H.: ECN-13 (1977).                                
18) MATSUMOTO, J.: PRIVATE COMMUNICATION (1981).                  
19) RAYNAL, J. CODE ECIS88                                        
20) RAMAN, S. ET AL.:AT. DATA AND NUCL. DATA TABLES 36, 1 (1987). 
21) SPEAR, R.H.: AT. DATA AND NUCL. DATA TABLES 42, 55 (1989).    
22) BENZI, V. AND REFFO, G.: CCDN-NW/10 (1969).                   
23) WISSHAK, K. ET AL.: KFK 5067 (1992).                          
24) FORREST, R.A.: AERE-R 12419 (1986).                           
25) FREHAUT, J., ET AL.: SYMP. ON NEUTRON CROSS SECTIONS FROM     
    10-50MEV, BNL, P.399 (1980).