18-Ar- 40

 18-Ar- 40 KHI        EVAL-MAR94 T.WATANABE                       
                      DIST-MAY10                       20090828   
----JENDL-4.0         MATERIAL 1837                               
-----INCIDENT NEUTRON DATA                                        
------ENDF-6 FORMAT                                               
                                                                  
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              The data were taken from JENDL-3.3.                 
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   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.       
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HISTORY                                                           
94-3  NEWLY EVALUATED                                             
                                                                  
MF=1  GENERAL INFORMATION                                         
  MT=451 COMMENTS AND DICTIONARY                                  
                                                                  
MF=2  RESONANCE PARAMETERS                                        
  MT=151 RESOLVED RESONANCE PARAMETERS(BELOW 1.49774MEV)          
  REICH-MOORE FORMULA WAS ADOPTED. ABOVE 100KEV,BACKGROUND CROSS  
  SECTION WAS GIVEN TO REPRODUCE WINTERS MEASUREMENT/1/.          
  NEGATIVE ENERGY LEVEL PARAMETERS WERE ADJUSTED TO REPRODUCE     
  2200M/S CROSS SECTIONS.                                         
  EVALUATION WAS MAINLY BASED ON WINTERS/1/, MACKLINS/2/ DATA     
  AND MUGHABGHABS/3/ COMPILATION.                                 
                                                                  
  CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS (BARNS)   
                     2200 M/S               RES. INTEG.           
      TOTAL           1.307                    -                  
      ELASTIC         0.647                    -                  
      CAPTURE         0.66                    0.294               
                                                                  
MF=3  NEUTRON CROSS SECTIONS                                      
  BELOW 1.49774 MEV, RESONANCE PARAMETERS WERE GIVEN.             
  BELOW 5.0MEV, WINTERS TOTAL CROSS SECTION MEASUREMENT/1/ WAS    
  FOLLOWED. ELASTIC SCATTERING CROSS SECTION WAS RECONSTRUCTED    
  FROM DIFFERENCE BETWEEN TOTAL AND SUM OF OTHER PARTIAL CROSS    
  SECTIONS.                                                       
  ABOVE 1.5 MEV, INELASTIC SCATTERING AND CAPTURE CROSS SECTION   
  AND ABOVE 5.0 MEV, TOTAL AND ELASTIC SCATTERING CROSS SECTION   
  WERE CALCULATED WITH THE OPTICAL AND STATISTICAL MODEL CODE     
  CASTHY/4/.                                                      
  DIRECT PROCESS FOR INELASTIC SCATTERING WERE CORRECTED WITH     
  DWBA CODE DWUCKY/5/. THE PARAMETERS USED IN DWUCKY CALCULATION  
  WERE ESTIMATED FROM RAMANS/6/ COMPILATION AND HALF LIFE DATA OF 
  ENSDF FILE/7/.                                                  
  OPTICAL MODEL PARAMETERS USED IN CASTHY CALCULATION WERE AS     
  FOLLOWS.                                                        
                                                                  
                DEPTH (MEV)       RADIUS(FM)    DIFFUSENESS(FM)   
         ----------------------   ------------  ---------------   
     V  = 53.39-0.2233E         , R0 =  4.4494     , A0 =  0.536  
     WS = 3.365+2.445E          , RS =  3.7448     , AS =  0.419  
     WSO= 4.705                 , RSO=  4.8085     , ASO=  0.6    
                                                                  
  THE LEVEL SCHEME WAS ADOPTED FROM ENSDF FILE.                   
           NO.      ENERGY(MEV)    SPIN-PARITY     BETA 2/3       
           GR.       0.0000          0  +                         
            1        1.4609          2  +          0.25           
            2        2.1208          0  +                         
            3        2.5241          2  +          0.15           
            4        2.8930          4  +                         
            5        3.2083          2  +          0.2            
            6        3.4645          6  +                         
            7        3.5113          1  +                         
            8        3.5150          4  +                         
            9        3.6810          3  -          0.25           
           10        3.9188          2  +          0.15           
           11        3.9420          1  +                         
           12        4.0420          0  +                         
           13        4.0829          3  -          0.2            
           14        4.1790          1  +                         
           15        4.2260          4  -                         
           16        4.2290          4  +                         
           17        4.3012          1  -                         
           18        4.3245          2  +          0.15           
           19        4.3580          1  -                         
           20        4.4190          3  -          0.15           
           21        4.4270          3  +                         
           22        4.4810          1  +                         
           23        4.4941          5  -                         
           24        4.5621          1  -                         
           25        4.5780          2  +                         
      LEVELS ABOVE 4.58 MEV WERE ASSUMED TO BE OVERLAPPING.       
                                                                  
  PARAMETERS FOR THE COMPOSITE LEVEL DENSITY FORMULA OF GIRBERT-  
  CAMERON WERE ADOPTED.                                           
  SPIN CUT-OFF PARAMETER C1 WAS TAKEN AS 0.146.                   
                                   AR- 40      AR- 41             
                                 --------    --------             
          A (MEV)                   8.301       8.443             
          SPIN CUT-OFF PARAM.       4.920       5.044             
          PAIRING ENERGY (MEV)      3.260       1.620             
          NORMALIZATION FACTOR     628.70      655.44             
          E-JOINT (MEV)             9.363       6.164             
                                                                  
  THE CAPTURE CROSS SECTION WAS NORMALIZED TO REPRODUCE 1.35      
  MILLIBARN AT 300 KEV/2/. ABOVE 1 MEV, DIRECT/SEMIDIRECT CAPTURE 
  CROSS SECTION NORMALIZED TO 0.523 MB AT 14.5 MEV WERE ADDED TO  
  ABOVE CASTHY'S RESULTS/8/.                                      
                                                                  
  MT=16,17,22,28,103,104,105,106,107                              
     (N,2N),(N,3N),(N,NA),(N,NP),(N,P),(N,D),(N,T),(N,HE-3),      
     (N,A)                                                        
  WERE EVALUATED WITH MODIFIED EGNASH-2/9/ USING F2=1.4 AND       
  FOLLOWING OPTICAL POTENTIALS,                                   
     NEUTRON   :SAME AS USED IN CASTHY                            
     PROTON    :PEREYS OMP/10/                                    
     DEUTRON   :PEREY-PEREYS OMP/11/                              
     TRITON    :RAGAINIS OMP/12/                                  
     HE-3      :LUETZESHWABS OMP/13/                              
     ALPHA     :BOCKS OMP/14/                                     
  AND NORMALIZED TO FOLLOWING VALUES AT 14.5 MEV.                 
     (N,NA)    2.17  MB        SYSTEMATICS/15/                    
     (N,NP)    0.06  MB        SYSTEMATICS                        
     (N,P)    16.0   MB        RANAKUMARS DATA/16/                
     (N,D)     2.9   MB        GRAYS DATA/17/                     
     (N,A)    10.0   MB        AV. OF EXP. DATA/16,18,19/         
                                                                  
  THE MU-BAR(MT=251) WAS ALSO CALCULATED WITH CASTHY.             
                                                                  
MF=4  ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS                 
  MT=2,16,17,22,28,51-75,91                                       
  ELASTIC AND INELASTIC SCATTERING,(N,2N),(N,3N),(N,NA),(N,NP)    
  ANGULAR DISTRIBUTIONS WERE CALCULATED WITH CASTHY FOR ELA-      
  STICALLY AND INELASTICALLY SCATTERED NEUTRONS.  THE DIRECT      
  INELASTIC SCATTERING CONTRIBUTION WAS EVALUATED WITH DWUCKY     
  PROGRAMM.                                                       
  AS FOR (N,2N),(N,3N),(N,NA) AND (N,NP),ISOTROPIC DISTRIBUTION   
  WAS ASSUMED.                                                    
                                                                  
MF=5  ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS                  
  MT=16,17,22,28,91                                               
  FOR (N,2N),(N,3N),(N,NA),(N,NP) AND CONTINUM INELASTIC SCATTER- 
  ING,SECONDARY NEUTRON ENERGY DISTRIBUTION WAS CALCULATED WITH   
  EGNASH-2.                                                       
                                                                  
REFERENCES                                                        
 1)R.R.WINTERTS ET. AT.,   PR    C43, 492(1991)                   
 2)R.L.MACKLIN  ET. AT.,   AAA   216, 109(1989)                   
 3)S.F.MUGHABGHAB ET. AL., NEUTRON CROSS SECTION VOL.1 PART A     
                           ACADEMIC PRESS(1981)                   
 4)S.IGARASHI,T.FUKAHORI   JAERI-1321    (1991)                   
 5)N.YAMAMURO              JAERI-M 88-140(1988)                   
 6)S.RAMAN ET AL.          AND 36,1(1987)                         
 7)EVALUATED NUCLEAR STRUCTURAL FILE                              
 8)T.NAKAGAWA              CAPDIR MANUAL                          
 9)N.YAMAMURO              JAERI-M 90-006(1991)                   
10)F.G.PEREY               PR    131, 745(1963)                   
11)C.M.PEREY,F.G.PEREY     PR    132, 752(1963)                   
12)R.C.RAGAINI ET. AL.     PR     C2,1020(1970)                   
13)J.W.LUETZELSCFWAB ET.AL PR    180,1023(1964)                   
14)R.BOCK ET. AL.          NP    A92, 539(1967)                   
15)R.A.FORREST             AERE-R 12419(1986)                     
16)N.RANAKUMAR ET AL.      NP/A 128,333(1969)                     
17)P.R.GRAY ET AL.         NP 62,172(1965)                        
18)S.KARDONSKY ET AL.      PR C4,840(1971)                        
19)L.HUSAIN                JIN 30,355(1968)