JENDL-3.3 Cm-248 0 0 0 0 9.624800+4 2.459410+2 1 1 0 29649 1451 1 0.000000+0 0.000000+0 0 0 0 69649 1451 2 1.000000+0 2.000000+7 3 0 10 39649 1451 3 0.000000+0 0.000000+0 0 0 211 549649 1451 4 96-CM-248 JAERI EVAL-OCT95 T.NAKAGAWA AND T.LIU 9649 1451 5 DIST-MAR02 REV2-OCT00 20001003 9649 1451 6 ----JENDL-3.3 MATERIAL 9649 9649 1451 7 -----INCIDENT NEUTRON DATA 9649 1451 8 ------ENDF-6 FORMAT 9649 1451 9 9649 1451 10 HISTORY 9649 1451 11 84-03 EVALUATION FOR JENDL-3 WAS MADE BY Y.KIKUCHI AND 9649 1451 12 T.NAKAGAWA (JAERI). DETAILS ARE GIVEN IN REF. /1/. 9649 1451 13 95-10 NEW EVALUATION FOR JENDL ACTINIDE FILE WAS MADE BY 9649 1451 14 T.NAKAGAWA AND T.LIU. 9649 1451 15 00-04 MODIFICATION WAS MADE BY T.NAKAGAWA. 9649 1451 16 9649 1451 17 ***** Modified parts from JENDL-3.2 ******************* 9649 1451 18 MF=2 9649 1451 19 MF=3 All data 9649 1451 20 MF=4 All data 9649 1451 21 MF=5 All data 9649 1451 22 ******************************************************* 9649 1451 23 9649 1451 24 9649 1451 25 MF=1 GENERAL INFORMATION 9649 1451 26 MT=451 COMMENTS AND DICTIONARY 9649 1451 27 MT=452 NUMBER OF NEUTRONS PER FISSION 9649 1451 28 SUM OF MT'S =455 AND 456. 9649 1451 29 MT=455 DELAYED NEUTRON DATA 9649 1451 30 SEMI-EMPIRICAL FORMULA BY TUTTLE /2/. 9649 1451 31 MT=456 PROMPT NEUTRON DATA 9649 1451 32 SEMI-EMPIRICAL FORMULA BY HOWERTON /3/. 9649 1451 33 9649 1451 34 MF=2,MT=151 RESONANCE PARAMETERS 9649 1451 35 (TAKEN FROM JENDL-3.2) 9649 1451 36 RESOLVED RESONANCE REGION (MLBW) : 1.0E-5 TO 1.5 KEV 9649 1451 37 RESONANCE ENERGIES, NEUTRON AND RADIATIVE WIDTHS WERE 9649 1451 38 TAKEN FROM THE EXPERIMENTAL DATA OF BENJAMIN ET AL./4/. 9649 1451 39 FOR RESONANCES WHOSE RADIATIVE WIDTH WAS UNKNOWN, THE 9649 1451 40 AVERAGE VALUE OF 0.026 EV /4/ WAS ADOPTED. THE FISSION 9649 1451 41 WIDTHS were adopted from Moore and Keyworth /5/ and 9649 1451 42 Maguire et al. /6/ THE AVERAGE FISSION WIDTH OF 0.0013 9649 1451 43 EV /5/ WAS USED FOR ALL RESONANCES OF WHICH FISSION 9649 1451 44 WIDTH HAD NOT BEEN MEASURED. Then the fission widths were9649 1451 45 roughly adjusted to the fission cross section measured by 9649 1451 46 Maguire et al. R=9.1 FM WAS ASSUMED TO REPRODUCE THE 9649 1451 47 POTENTIAL SCATTERING CROSS SECTION OF 10.4 BARNS ASSUMED 9649 1451 48 BY BENJAMIN ET AL./4/. THE NEUTRON WIDTH OF THE FIRST 9649 1451 49 RESONANCE WAS SLIGHTLY ADJUSTED TO REPRODUCE THE CAPTURE 9649 1451 50 CROSS SECTION OF 2.57 BARNS AT 0.0253 EV. BACKGROUND 9649 1451 51 CROSS SECTIONS WERE GIVEN ONLY FOR THE FISSION AND TOTAL 9649 1451 52 CROSS SECTIONS BY ASSUMING THE FORM OF 1/V. THE THERMAL 9649 1451 53 CROSS SECTIONS TO BE REPRODUCED WERE ESTIMATED FROM 9649 1451 54 AVAILABLE EXPERIMENTAL DATA. 9649 1451 55 9649 1451 56 UNRESOLVED RESONANCE REGION : 1.5 KEV TO 30 KEV 9649 1451 57 PARAMETERS WERE DETERMINED WITH A FITTING CODE ASREP/7/ 9649 1451 58 OBTAINED FROM OPTICAL MODEL CALCULATION: 9649 1451 59 S1=3.32E-4, S2=0.844E-4. 9649 1451 60 ESTIMATED FROM RESOLVED RESONANCES: 9649 1451 61 D-OBS=40.0 EV, GAM-G=26 MILLI-EV, S0=1.2E-4 9649 1451 62 GAM-F OBTAINED BY FITTING THE DATA OF STOPA ET AL./6/ 9649 1451 63 Scattring radius R was adjusted so as to reproduce the 9649 1451 64 ealstic scattering cross section calculated with CASTHY 9649 1451 65 at 30 keV. 9649 1451 66 9649 1451 67 CALCULATED 2200 M/S CROSS SECTIONS AND RESONANCE INTEGRALS 9649 1451 68 2200 M/S VALUE RES. INT. 9649 1451 69 TOTAL 9.456 B - 9649 1451 70 ELASTIC 6.514 B - 9649 1451 71 FISSION 0.372 B 10.0 B 9649 1451 72 CAPTURE 2.570 B 267. B 9649 1451 73 9649 1451 74 MF=3 NEUTRON CROSS SECTIONS 9649 1451 75 BELOW 30 KEV, CROSS SECTIONS WERE REPRESENTED WITH RESONANCE 9649 1451 76 PARAMETERS. BACKGROUND CROSS SECTION WAS GIVEN TO FISSION. 9649 1451 77 9649 1451 78 MT=1 TOTAL CROSS SECTION 9649 1451 79 CALCULATED WITH CASTHY CODE /8/ BASED ON THE SHERICAL 9649 1451 80 OPTICAL MODEL. THE OPTICAL POTENTIAL OF REF./9/ WERE 9649 1451 81 USED. 9649 1451 82 9649 1451 83 V = 45.036-0.3*EN (MEV) 9649 1451 84 WS= 4.115+0.4*EN (MEV) 9649 1451 85 WV= 0 , VSO = 7.5 (MEV) 9649 1451 86 R = RSO = 1.256 , RS = 1.260 (FM) 9649 1451 87 A = ASO = 0.626 , B = 0.555+0.0045*EN (FM) 9649 1451 88 9649 1451 89 COMPETING PROCESSES OF THE FISSION, (N,2N) AND (N,3N) WERE 9649 1451 90 TAKEN INTO ACCOUNT. THE FOLLOWING LEVEL DENSITY PARAMETERS 9649 1451 91 OF GILBERT-CAMERON'S FORMULA /10/ WERE USED. 9649 1451 92 9649 1451 93 ISOTOPE CM-248 CM-249 9649 1451 94 A(1/MEV) 27.8 34.2 9649 1451 95 SPIN-CUTOFF PARA. 30.39 33.79 9649 1451 96 PAIRING E(MEV) 0.0 0.903 9649 1451 97 TEMP. (MEV) 0.326 0.366 9649 1451 98 C(1/MEV) 10.8 12.2 9649 1451 99 EX(MEV) 1.85 4.30 9649 1451 100 9649 1451 101 THE LEVEL SCHEME TAKEN FROM REF. /11/. 9649 1451 102 NO. ENERGY(KEV) SPIN-PARITY 9649 1451 103 G.S. 0.0 0 + 9649 1451 104 1. 43.4 2 + 9649 1451 105 2. 143.8 4 + 9649 1451 106 3. 298.8 6 + 9649 1451 107 4. 506.0 8 + 9649 1451 108 5. 761.9 10 + 9649 1451 109 6. 1049.0 2 + 9649 1451 110 7. 1049.0 1 - 9649 1451 111 8. 1062.8 12 + 9649 1451 112 9. 1084.0 0 + 9649 1451 113 10. 1094.0 3 - 9649 1451 114 11. 1126.0 2 + 9649 1451 115 12. 1143.0 4 + 9649 1451 116 13. 1172.0 5 - 9649 1451 117 14. 1222.0 4 + 9649 1451 118 15. 1235.0 3 - 9649 1451 119 16. 1302.0 3 - 9649 1451 120 CONTINUUM LEVELS ASSUMED ABOVE 1314 KEV. 9649 1451 121 9649 1451 122 MT= 2 ELASTIC SCATTERING 9649 1451 123 CALCULATED AS TOTAL - PARTIAL CROSS SECTIONS. 9649 1451 124 9649 1451 125 MT= 4 TOTAL INELASTIC SCATTERING 9649 1451 126 SUM OF MT=51, 52, 53, 54 AND 91. 9649 1451 127 9649 1451 128 MT=16,17 (N,2N),(N,3N) CROSS SECTION 9649 1451 129 STAPRE RESULTS CALCULATED BY KONSHIN /12/ WERE ADOPTED. 9649 1451 130 9649 1451 131 MT=18 FISSION CROSS SECTION 9649 1451 132 BELOW 6 MEV TAKEN FROM JENDL-3.2 WHICH WAS EVALUATED ON 9649 1451 133 THE BASIS OF THE MEASURED DATA BY STOPA ET AL./6/ AND 9649 1451 134 FOMUSHKIN ET AL./13/. FROM 6 MEV TO 8 MEV, THE STAPRE 9649 1451 135 RESULT CALCULATED BY KONSHIN /12/ WERE USED. FROM 8 MEV 9649 1451 136 TO 20 MEV BY EYE GUIDE, BASED ON THE MEASURED DATA OF 9649 1451 137 FOMUSHKIN ET AL./14/ 9649 1451 138 9649 1451 139 MT=51, 52, 53, 54 Inelastic scattering 9649 1451 140 CALCULATED BY ECIS /15/ AND CASTHY /8/ CODES. 9649 1451 141 LAGRANGE'S DEFORMED OPTICAL POTENTIAL PARAMETERS /16/ WERE 9649 1451 142 USED. 9649 1451 143 V = 49.82 - 17*((N-Z)/A) - 0.3*EN (MEV) 9649 1451 144 WS = 5.52 - 9*((N-Z)/A)+ 0.4*EN (MEV)