18-Ar- 40 KHI EVAL-MAR94 T.WATANABE DIST-DEC21 20090828 ----JENDL-5 MATERIAL 1837 -----INCIDENT NEUTRON DATA ------ENDF-6 FORMAT History 21-11 revised by O.Iwamoto (MF8/MT16,17,22,28,102-107) JENDL/AD-2017 adopted (MF8/MT4) added 21-11 above 20 MeV, JENDL-4.0/HE merged by O.Iwamoto 21-11 (MF6/MT5) recoil spectrum added by O.Iwamoto =========================================================== The data were taken from JENDL-3.3. =========================================================== =========================================================== 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 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. 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