ENTRY 10654 20051010 13371065400000001 SUBENT 10654001 20051010 13371065400100001 BIB 12 53 1065400100002 INSTITUTE (1USAANL) 1065400100003 REFERENCE (J,NSE,65,171,1978) 1065400100004 (R,ANL-NDM-83,1983) revised data. 1065400100005 (C,76ANL,73,1976) 1065400100006 AUTHOR (J.W.Meadows) 1065400100007 TITLE The fission cross sections of uranium-234 and 1065400100008 uranium-236 isotopes relative to u-235. 1065400100009 FACILITY (DYNAM) Fast neutron generator 1065400100010 INC-SOURCE (P-LI7) Protons on lithium metal for neutron energies 1065400100011 to 5 MeV. 1065400100012 (D-D) Deuterons on deuterium gas for neutron energies 1065400100013 above 5 MeV. 1065400100014 SAMPLE Samples were deposited on 0.25 mm stainless steel or 1065400100015 0.13 mm molybdinum plates by electro deposition or 1065400100016 vaccuum evaporation of UF(4). 1065400100017 Shape measurements were made with high purity samples. 1065400100018 METHOD Pulsed beam and fast timing used to reduce and measure 1065400100019 time independent background. absolute measurements made1065400100020 between 2 and 3 MeV. shape measurement normalized in 1065400100021 this region 1065400100022 for absolute ratio measurements, mass ratios were 1065400100023 obtained by comparing thermal fission ratio of U-235 1065400100024 samples with U-234 and U-236 samples containing 10 1065400100025 percent U-235. 1065400100026 For 234-U/235-U ratios mass ratios were also obtained 1065400100027 by comparing alpha decay rates of 234-U samples and 1065400100028 235-U samples containing 1 percent 234-U for 236-U/ 1065400100029 235-U ratios. 1065400100030 Sample mass ratios were also obtained by low geometry 1065400100031 alpha counting and specific activities calculated 1065400100032 using isotopic analysis and reported alpha half- 1065400100033 lives. 1065400100034 DETECTOR (IOCH) samples back-to-back in low mass double 1065400100035 ionization chamber using methane as counter gas placed 1065400100036 5 cm from neutron source 1065400100037 CORRECTION Corrected for second Li-7(p,n) group, Li-7 and D 1065400100038 break-up neutrons, scattering in detector and neutron 1065400100039 source assembly, pulse-height distribution below bias 1065400100040 level. sample geometry differences eliminated by 1065400100041 measurements in both detector orientations. momentum 1065400100042 effects reduced using same procedure. corrections made 1065400100043 for remaining momentum effects, deposit thickness and 1065400100044 fragment angular distributions. background from (d,n) 1065400100045 reactions with gas target assembly measured with empty 1065400100046 gas cell. 1065400100047 STATUS Data taken from ANL-NDM-83. 1065400100048 (APRVD) J.W.Meadows, 1984/3/2. 1065400100049 HISTORY (19770330C) 1065400100050 (19780405U) Reference update 1065400100051 (19831109U) Data heading update. 1065400100052 (19840206A) Updated as per ANL-NDM-83. 1065400100053 (20051010C) DR Line "10654002 36" corrected and 1065400100054 format updated 1065400100055 ENDBIB 53 0 1065400100056 NOCOMMON 0 0 1065400100057 ENDSUBENT 56 0 1065400199999 SUBENT 10654002 19840306 13371065400200001 BIB 3 17 1065400200002 REACTION 1((92-U-236(N,F),,SIG)/(92-U-235(N,F),,SIG)) 1065400200003 2(92-U-236(N,F),,SIG) 1065400200004 MONITOR Ratio normalized between 2.2 and 3.0 MeV. 1065400200005 2(92-U-235(N,F),,SIG) from ENDF/B-V. 1065400200006 ERR-ANALYS1(ERR-S) Statistical uncertainty 1065400200007 (ERR-T) Total uncertainty includes statistical 1065400200008 Error plus errors (in percent) due to - 1065400200009 233-U Half-life (0.03) 1065400200010 Isotopic analysis (0.29) 1065400200011 Alpha-counting system (0.15) 1065400200012 Thickness correction (0.10) 1065400200013 Extrapolation (0.10) 1065400200014 Dead-time correction (0.25) 1065400200015 Scattering correction (0.60) 1065400200016 Secondary source reactions (20 percent of correction) 1065400200017 Error in neutron energy (about 20 percent of energy 1065400200018 resolution) 1065400200019 ENDBIB 17 0 1065400200020 NOCOMMON 0 0 1065400200021 DATA 6 57 1065400200022 EN EN-RSL-FW DATA 1ERR-S 1ERR-T 1DATA 21065400200023 MEV MEV NO-DIM PER-CENT PER-CENT B 1065400200024 0.596 0.045 0.01233 1.17 16.10 0.01413 1065400200025 0.646 0.044 0.01664 1.33 17.00 0.01898 1065400200026 0.695 0.042 0.0591 1.30 11.10 0.0672 1065400200027 0.747 0.041 0.0616 1.24 8.49 0.0700 1065400200028 0.796 0.040 0.0982 1.87 6.56 0.1118 1065400200029 0.801 0.032 0.1109 1.81 4.97 0.1263 1065400200030 0.845 0.040 0.1467 1.62 5.87 0.1681 1065400200031 0.852 0.032 0.1565 1.55 5.47 0.1797 1065400200032 0.899 0.031 0.2117 1.38 4.16 0.2472 1065400200033 0.948 0.030 0.2862 1.24 1.58 0.3434 1065400200034 0.998 0.030 0.2940 1.25 1.59 0.3586 1065400200035 1.047 0.029 0.2940 1.36 1.68 0.3573 1065400200036 1.094 0.035 0.345 1.22 5.03 0.419 1065400200037 1.097 0.029 0.361 1.40 4.41 0.438 1065400200038 1.146 0.072 0.428 1.16 4.70 0.521 1065400200039 1.192 0.035 0.485 1.87 2.49 0.592 1065400200040 1.196 0.028 0.474 1.39 1.99 0.578 1065400200041 1.240 0.072 0.513 0.69 1.99 0.628 1065400200042 1.338 0.068 0.549 0.69 1.53 0.676 1065400200043 1.434 0.066 0.576 0.69 1.18 0.716 1065400200044 1.534 0.064 0.529 0.75 1.52 0.664 1065400200045 1.631 0.062 0.543 0.5 1.36 0.689 1065400200046 1.727 0.062 0.603 0.88 1.46 0.772 1065400200047 1.823 0.061 0.606 0.77 1.19 0.782 1065400200048 1.925 0.060 0.619 0.77 1.16 0.801 1065400200049 2.023 0.059 0.639 0.84 1.22 0.830 1065400200050 2.243 0.110 0.668 0.70 1.15 0.861 1065400200051 2.490 0.105 0.687 0.70 1.12 0.872 1065400200052 2.736 0.101 0.697 0.70 1.11 0.868 1065400200053 2.983 0.095 0.716 0.70 1.12 0.874 1065400200054 3.230 0.090 0.728 0.78 1.17 0.872 1065400200055 3.477 0.085 0.754 0.80 1.21 0.887 1065400200056 3.725 0.081 0.769 0.80 1.26 0.888 1065400200057 3.976 0.078 0.778 0.79 1.35 0.882 1065400200058 4.228 0.078 0.782 0.93 2.01 0.880 1065400200059 4.479 0.075 0.795 0.94 1.96 0.885 1065400200060 4.731 0.074 0.780 0.95 2.42 0.849 1065400200061 4.747 0.296 0.787 0.84 1.21 0.856 1065400200062 5.048 0.250 0.778 0.86 1.21 0.825 1065400200063 5.343 0.222 0.789 0.89 1.27 0.826 1065400200064 5.622 0.204 0.818 0.89 1.30 0.859 1065400200065 5.900 0.190 0.840 0.90 1.30 0.910 1065400200066 6.168 0.178 0.836 0.93 1.33 0.997 1065400200067 6.435 0.165 0.884 0.96 1.31 1.172 1065400200068 6.695 0.154 0.908 1.03 1.34 1.319 1065400200069 6.952 0.144 0.890 1.05 1.36 1.368 1065400200070 7.207 0.137 0.884 0.90 1.24 1.443 1065400200071 7.460 0.132 0.884 1.03 1.34 1.509 1065400200072 7.712 0.128 0.861 1.03 1.34 1.512 1065400200073 8.076 0.125 0.869 0.99 1.30 1.549 1065400200074 8.340 0.123 0.878 0.99 1.34 1.567 1065400200075 8.686 0.123 0.858 0.94 1.28 1.526 1065400200076 8.931 0.120 0.864 1.06 1.42 1.532 1065400200077 9.174 0.120 0.855 1.04 1.43 1.512 1065400200078 9.419 0.120 0.862 1.05 1.50 1.520 1065400200079 9.673 0.121 0.828 1.05 1.53 1.456 1065400200080 9.905 0.122 0.867 1.03 1.78 1.519 1065400200081 ENDDATA 59 0 1065400200082 ENDSUBENT 81 0 1065400299999 SUBENT 10654003 19860825 13371065400300001 BIB 4 21 1065400300002 REACTION 1((92-U-234(N,F),,SIG)/(92-U-235(N,F),,SIG)) 1065400300003 2(92-U-234(N,F),,SIG) 1065400300004 MONITOR Ratio normalized between 1.9 and 2.8 MeV. 1065400300005 2(92-U-235(N,F),,SIG) from ENDF/B-V. 1065400300006 ERR-ANALYS1(ERR-S) Statistical uncertainty 1065400300007 (ERR-T) Total uncertainty includes statistical 1065400300008 Error plus errors (in percent) due to - 1065400300009 233-U half-life (0.03) 1065400300010 234-U half-life (0.06) 1065400300011 236-U half-life (0.08) 1065400300012 isotopic analysis (0.31) 1065400300013 alpha-counting system (0.15) 1065400300014 thickness correction (0.18) 1065400300015 extrapolation (0.10) 1065400300016 dead-time correction (0.25) 1065400300017 scattering correction (0.45) 1065400300018 Secondary source reactions (20 percent of correction) 1065400300019 error in neutron energy (about 20 percent of energy 1065400300020 resolution) 1065400300021 HISTORY (19860825A) Reaction corrected. 1065400300022 (20051010C) DR Format updated 1065400300023 ENDBIB 21 0 1065400300024 NOCOMMON 0 0 1065400300025 DATA 6 56 1065400300026 EN EN-RSL-FW DATA 1ERR-S 1ERR-T 1DATA 21065400300027 MEV MEV NO-DIM PER-CENT PER-CENT B 1065400300028 0.600 0.044 0.682 1.06 3.67 0.781 1065400300029 0.643 0.043 0.785 1.16 3.11 0.895 1065400300030 0.700 0.042 0.891 1.15 2.59 1.014 1065400300031 0.747 0.041 1.046 1.14 2.61 1.190 1065400300032 0.799 0.040 1.172 0.97 1.29 1.334 1065400300033 0.850 0.039 1.113 0.99 1.58 1.276 1065400300034 0.900 0.039 1.048 0.91 1.69 1.225 1065400300035 0.946 0.038 0.948 1.14 1.76 1.136 1065400300036 0.998 0.038 0.919 1.14 1.43 1.121 1065400300037 1.048 0.037 0.967 1.18 2.09 1.175 1065400300038 1.097 0.037 1.011 1.14 1.63 1.229 1065400300039 1.148 0.036 1.007 1.17 1.44 1.225 1065400300040 1.194 0.036 1.021 0.82 1.17 1.246 1065400300041 1.244 0.035 1.017 0.97 1.29 1.244 1065400300042 1.338 0.068 1.069 0.94 1.34 1.318 1065400300043 1.434 0.067 1.098 0.97 1.38 1.366 1065400300044 1.536 0.065 1.147 0.88 1.32 1.440 1065400300045 1.631 0.062 1.196 0.81 1.22 1.516 1065400300046 1.733 0.062 1.216 0.81 1.17 1.558 1065400300047 1.817 0.061 1.227 0.97 1.28 1.581 1065400300048 1.829 0.061 1.207 1.10 1.38 1.556 1065400300049 1.928 0.060 1.206 0.54 0.99 1.561 1065400300050 2.242 0.111 1.177 0.54 0.99 1.517 1065400300051 2.490 0.105 1.191 0.62 1.04 1.511 1065400300052 2.736 0.101 1.215 0.48 0.96 1.514 1065400300053 2.983 0.094 1.243 0.51 1.00 1.517 1065400300054 3.231 0.094 1.281 0.92 1.25 1.535 1065400300055 3.482 0.085 1.286 0.76 1.14 1.512 1065400300056 3.726 0.081 1.294 0.76 1.16 1.493 1065400300057 3.973 0.079 1.286 0.74 1.17 1.458 1065400300058 4.229 0.077 1.275 1.00 1.47 1.433 1065400300059 4.479 0.075 1.326 0.89 1.61 1.475 1065400300060 4.747 0.296 1.270 1.06 1.34 1.381 1065400300061 4.794 0.073 1.276 1.00 1.75 1.382 1065400300062 4.982 0.072 1.281 1.01 2.59 1.365 1065400300063 5.048 0.250 1.236 1.06 1.34 1.311 1065400300064 5.343 0.222 1.258 1.06 1.34 1.318 1065400300065 5.622 0.204 1.258 1.06 1.34 1.321 1065400300066 5.900 0.190 1.229 1.06 1.34 1.331 1065400300067 6.168 0.178 1.226 1.14 1.40 1.461 1065400300068 6.435 0.165 1.202 1.06 1.34 1.594 1065400300069 6.691 0.154 1.191 1.07 1.35 1.831 1065400300070 7.207 0.137 1.208 1.08 1.36 1.972 1065400300071 7.460 0.132 1.203 1.06 1.34 2.054 1065400300072 7.712 0.128 1.217 1.10 1.37 2.137 1065400300073 7.961 0.126 1.217 1.10 1.37 2.164 1065400300074 8.192 0.124 1.202 1.08 1.36 2.144 1065400300075 8.210 0.124 1.190 1.08 1.36 2.122 1065400300076 8.441 0.122 1.201 1.17 1.43 2.140 1065400300077 8.686 0.120 1.203 1.23 1.48 2.139 1065400300078 8.916 0.124 1.207 1.14 1.40 2.143 1065400300079 8.931 0.120 1.197 1.13 1.40 2.122 1065400300080 9.174 0.120 1.200 1.24 1.49 2.122 1065400300081 9.419 0.120 1.196 1.13 1.40 2.109 1065400300082 9.673 0.121 1.180 1.15 1.42 2.073 1065400300083 9.905 0.122 1.179 1.11 1.38 2.064 1065400300084 ENDDATA 58 0 1065400300085 ENDSUBENT 84 0 1065400399999 ENDENTRY 3 0 1065499999999