ENTRY 10734 20221223 150410734000 1 SUBENT 10734001 20221223 150410734001 1 BIB 11 42 10734001 2 TITLE The fission cross sections of plutonium-239 and 10734001 3 plutonium-242 relative to uranium-235 from 0.1 to 10734001 4 10 MeV 10734001 5 AUTHOR (J.W.Meadows) 10734001 6 INSTITUTE (1USAANL) 10734001 7 REFERENCE (J,NSE,68,360,1978) 10734001 8 (R,ANL-NDM-83,1983) Revised data in table 10734001 9 FACILITY (DYNAM,1USAANL) Argonne 8 MeV Tandem Dynamitron 10734001 10 INC-SOURCE (P-LI7) for below En~5 MeV 10734001 11 Targets produced by evaporation of Li on Ta backing. 10734001 12 Target thicknesses about 200 keV above 2 MeV neutron 10734001 13 energy but thinner at lower energies. 10734001 14 (D-D) for above En~5 MeV 10734001 15 Deuterium gas in a 2-cm-long cell filled to 2 atm. 10734001 16 METHOD (TOF) Pulsed beam and fast timing used to reduce and 10734001 17 measure time independent background 10734001 18 DETECTOR (IOCH) Samples back-to-back in low mass double 10734001 19 ionization chamber using methane as counter gas 10734001 20 placed 5 cm from neutron source. 10734001 21 CORRECTION Corrected for: 10734001 22 - second 7Li(p,n) group, 10734001 23 - 7Li and d break-up neutrons, 10734001 24 - scattering in detector and neutron source assembly, 10734001 25 - pulse-height distribution below bias level. 10734001 26 Sample geometry differences eliminated by measurements 10734001 27 in both detector orientations. 10734001 28 Momentum effects reduced by same procedure. 10734001 29 Corrections made for remaining momentum effects, 10734001 30 deposit thickness and fragment angular distributions. 10734001 31 Background from (d,n) reactions with gas target 10734001 32 assembly measured with empty gas cell. 10734001 33 STATUS (APRVD) J.W.Meadows, 1984/3/2. 10734001 34 HISTORY (19780404C) 10734001 35 (19781107U) BIB corrections 10734001 36 (19790110A) Reference update. BIB correction. 10734001 37 (19831230A) Revised as per ANL-NDM-83. 10734001 38 (20090911A) VM:Updated to new date formats,lower case. 10734001 39 BIB updates. 10734001 40 (20101027A) VM: 242Pu data moved from data set 10749. 10734001 41 BIB updates. 10734001 42 (20190722A) On. Major alterations in 002-003. 10734001 43 (20221223A) On. Major alterations in 002-003. 10734001 44 ENDBIB 42 0 10734001 45 NOCOMMON 0 0 10734001 46 ENDSUBENT 45 0 1073400199999 SUBENT 10734002 20221223 150410734002 1 BIB 9 43 10734002 2 REACTION 1((94-PU-239(N,F),,SIG)/(92-U-235(N,F),,SIG)) 10734002 3 2(94-PU-239(N,F),,SIG) 10734002 4 SAMPLE Samples deposited on 0.25-mm thick stainless steel 10734002 5 or 0.12-mm thick Mo plates by electrodeposition or 10734002 6 vacuum evaporation. 10734002 7 Mass ratios measured by relative thermal fission rates 10734002 8 of 235U sample and high purity 239Pu sample. 10734002 9 Also measured by absolute alpha counting of 239Pu and 10734002 10 235U containing about 1% 234U. 10734002 11 (94-PU-239,ENR=0.99952) 10734002 12 (94-PU-240,ENR=0.00048) 10734002 13 ANALYSIS 230Pu(n,f)/235U(n,f) shape ratio normalized to the 10734002 14 absolute ratio measured at 2.232, 2.476, 2.792 and 10734002 15 2.975 MeV. 10734002 16 MONITOR 2(92-U-235(N,F),,SIG) 10734002 17 MONIT-REF 2(,,3,ENDF/B-V,,1978) 10734002 18 ERR-ANALYS1(ERR-T) Total error 10734002 19 - secondary source reactions (20% of correction) 10734002 20 - propagation from neutron energy error (~20% of the 10734002 21 energy resolution) 10734002 22 (ERR-1,,,F) Normalization of shape ratio: 10734002 23 - 234U half life (0.12%) 10734002 24 - 239Pu half life (0.05%) 10734002 25 - 239Pu/235U thermal ratio (0.25%) 10734002 26 - isotope analysis (0.19%) 10734002 27 - alpha-counting excluding statistics (0.15%) 10734002 28 - thickness correction (0.19%) 10734002 29 - extrapolation (0.20%) 10734002 30 - dead time correction (0.25%) 10734002 31 - scattering correction (0.30%) 10734002 32 - statistical - alpha counting etc. (0.55%) 10734002 33 (ERR-2,,,U) Uncorrelated error, which principle due to 10734002 34 the counting statistics, but a part is based on the 10734002 35 consistency of repeated measurements. 10734002 36 COMMENT By compiler (2019-07-22): 10734002 37 The uncorrelated error (ERR-2) is smaller than the 10734002 38 total error (ERR-T) at 1.622 MeV on the ANL-NDM-83. 10734002 39 The compiler assumes "1.36" should read "1.63". 10734002 40 STATUS (TABLE) Table XV of ANL-NDM-83 10734002 41 HISTORY (19790110A) BIB correction and addition. 10734002 42 (20190722A) On. ERR-S -> ERR-2. ERR-1 added. 10734002 43 (20221223A) On. EN-RSL-FW=1.196 MeV -> 0.196 MeV at 10734002 44 5.867 MeV 10734002 45 ENDBIB 43 0 10734002 46 COMMON 1 3 10734002 47 ERR-1 10734002 48 PER-CENT 10734002 49 0.82 10734002 50 ENDCOMMON 3 0 10734002 51 DATA 6 73 10734002 52 EN EN-RSL-FW DATA 1ERR-2 1ERR-T 1DATA 210734002 53 MEV MEV NO-DIM PER-CENT PER-CENT B 10734002 54 0.146 0.020 0.968 0.90 1.28 1.417 10734002 55 0.172 0.019 1.107 1.28 1.57 1.572 10734002 56 0.197 0.019 1.094 0.90 1.29 1.511 10734002 57 0.220 0.018 1.131 1.34 1.62 1.519 10734002 58 0.247 0.017 1.157 0.88 1.25 1.510 10734002 59 0.268 0.017 1.215 1.28 1.56 1.559 10734002 60 0.268 0.058 1.191 0.99 1.62 1.529 10734002 61 0.294 0.022 1.266 1.34 1.62 1.602 10734002 62 0.311 0.016 1.260 1.38 1.63 1.583 10734002 63 0.323 0.066 1.264 0.99 1.65 1.580 10734002 64 0.336 0.016 1.256 1.42 1.66 1.561 10734002 65 0.348 0.016 1.308 1.46 1.69 1.617 10734002 66 0.384 0.062 1.286 0.98 1.46 1.565 10734002 67 0.391 0.062 1.340 1.49 1.83 1.625 10734002 68 0.452 0.060 1.346 0.94 1.36 1.592 10734002 69 0.500 0.046 1.372 0.91 1.28 1.601 10734002 70 0.550 0.045 1.393 0.94 1.27 1.609 10734002 71 0.598 0.055 1.428 0.80 1.22 1.635 10734002 72 0.650 0.054 1.418 1.04 1.40 1.616 10734002 73 0.687 0.053 1.422 1.71 1.95 1.618 10734002 74 0.746 0.052 1.480 1.05 1.37 1.683 10734002 75 0.795 0.050 1.546 1.81 2.00 1.760 10734002 76 0.846 0.049 1.511 1.06 1.39 1.732 10734002 77 0.877 0.080 1.499 1.86 2.11 1.736 10734002 78 0.943 0.047 1.431 1.51 1.74 1.712 10734002 79 0.980 0.047 1.432 1.49 1.70 1.743 10734002 80 0.993 0.046 1.472 0.94 1.25 1.794 10734002 81 1.045 0.045 1.416 1.77 1.95 1.721 10734002 82 1.099 0.044 1.443 0.93 1.26 1.753 10734002 83 1.140 0.074 1.480 0.95 1.32 1.799 10734002 84 1.196 0.043 1.467 0.93 1.25 1.789 10734002 85 1.234 0.072 1.497 0.95 1.34 1.829 10734002 86 1.332 0.070 1.559 0.95 1.31 1.921 10734002 87 1.429 0.067 1.603 1.41 1.64 1.992 10734002 88 1.526 0.065 1.581 1.41 1.64 1.984 10734002 89 1.622 0.063 1.544 1.45 1.63 1.957 10734002 90 1.720 0.061 1.503 1.43 1.65 1.924 10734002 91 1.818 0.059 1.555 1.47 1.68 2.005 10734002 92 1.893 0.120 1.550 1.19 1.44 2.005 10734002 93 1.924 0.056 1.551 1.46 1.67 2.009 10734002 94 2.021 0.054 1.609 1.74 1.92 2.089 10734002 95 2.232 0.111 1.554 0.68 1.07 2.005 10734002 96 2.476 0.106 1.518 0.67 1.06 1.929 10734002 97 2.792 0.101 1.532 0.74 1.10 1.901 10734002 98 2.975 0.096 1.543 0.57 1.00 1.885 10734002 99 3.226 0.092 1.544 0.86 1.19 1.851 10734002 100 3.470 0.087 1.580 0.75 1.11 1.861 10734002 101 3.719 0.083 1.581 0.72 1.10 1.826 10734002 102 3.968 0.080 1.568 0.74 1.11 1.779 10734002 103 4.221 0.076 1.579 1.03 1.33 1.776 10734002 104 4.472 0.074 1.573 1.11 1.39 1.752 10734002 105 4.724 0.074 1.607 1.06 1.36 1.752 10734002 106 4.972 0.070 1.607 1.23 1.51 1.715 10734002 107 5.017 0.264 1.625 0.92 1.24 1.728 10734002 108 5.309 0.235 1.640 0.88 1.21 1.718 10734002 109 5.594 0.211 1.663 0.99 1.29 1.744 10734002 110 5.867 0.196 1.663 0.96 1.35 1.791 10734002 111 6.137 0.180 1.609 0.99 1.52 1.894 10734002 112 6.401 0.172 1.514 1.01 1.50 1.978 10734002 113 6.660 0.163 1.430 1.04 1.42 2.056 10734002 114 6.921 0.154 1.388 1.07 1.41 2.120 10734002 115 7.176 0.146 1.372 1.01 1.33 2.224 10734002 116 7.432 0.142 1.319 0.99 1.29 2.243 10734002 117 7.686 0.138 1.312 0.94 1.25 2.299 10734002 118 7.936 0.133 1.301 0.97 1.27 2.313 10734002 119 8.182 0.132 1.363 1.00 1.29 2.431 10734002 120 8.428 0.131 1.316 0.99 1.29 2.347 10734002 121 8.673 0.131 1.315 0.99 1.29 2.340 10734002 122 8.918 0.131 1.325 1.02 1.32 2.351 10734002 123 9.161 0.132 1.307 1.03 1.35 2.313 10734002 124 9.407 0.133 1.344 0.99 1.33 2.370 10734002 125 9.648 0.137 1.317 0.97 1.36 2.316 10734002 126 9.903 0.142 1.308 0.99 1.55 2.288 10734002 127 ENDDATA 75 0 10734002 128 ENDSUBENT 127 0 1073400299999 SUBENT 10734003 20221223 150410734003 1 BIB 7 35 10734003 2 REACTION 1((94-PU-242(N,F),,SIG)/(92-U-235(N,F),,SIG)) 10734003 3 2(94-PU-242(N,F),,SIG) 10734003 4 SAMPLE Samples deposited on 0.25-mm thick stainless steel 10734003 5 or 0.12-mm thick Mo plates by electrodeposition. 10734003 6 Mass ratios measured by absolute alpha counting 10734003 7 of 242Pu samples containing 239Pu and 235U samples 10734003 8 containing 234U. 10734003 9 MONITOR 2(92-U-235(N,F),,SIG) 10734003 10 MONIT-REF 2(,,3,ENDF/B-V,,1978) 10734003 11 ERR-ANALYS1(ERR-T) Total error 10734003 12 - secondary source reactions (20% of correction) 10734003 13 - propagation from neutron energy error (~20% of the 10734003 14 energy resolution) 10734003 15 (ERR-1,,,F) Normalization of shape ratio: 10734003 16 - 233U half-life (0.02%) 10734003 17 - 234U half-life (0.05%) 10734003 18 - 239Pu half-life (0.05%) 10734003 19 - 239Pu/235U thermal ratio (0.25%) 10734003 20 - isotopic analysis (0.32%) 10734003 21 - isotopic dilution (0.25%) 10734003 22 - calorimetric analysis (0.10%) 10734003 23 - alpha-counting excluding statistics (0.52%) 10734003 24 - thickness correction (0.10%) 10734003 25 - extrapolation to zero bias (0.20%) 10734003 26 - dead time correction (0.25%) 10734003 27 - scattering correction (0.30%) 10734003 28 - statistical - alpha counting etc. (0.60%) 10734003 29 (ERR-2,,,U) Uncorrelated error, which principle due to 10734003 30 the counting statistics, but a part is based on the 10734003 31 consistency of repeated measurements. 10734003 32 STATUS (TABLE) Table XVII of ANL-NDM-83 10734003 33 HISTORY (20101027C) Data moved from 10749.002. 10734003 34 (20190722A) On. ERR-S -> ERR-2. ERR-1 added. 10734003 35 (20221223A) On. EN-RSL-FW=0.105 MeV -> 0.100 MeV 10734003 36 at 2.736 MeV; EN=7.293 MeV -> 7.193 MeV 10734003 37 ENDBIB 35 0 10734003 38 COMMON 1 3 10734003 39 ERR-1 10734003 40 PER-CENT 10734003 41 1.04 10734003 42 ENDCOMMON 3 0 10734003 43 DATA 6 49 10734003 44 EN EN-RSL-FW DATA 1ERR-2 1ERR-T 1DATA 210734003 45 MEV MEV NO-DIM PER-CENT PER-CENT B 10734003 46 0.397 0.051 0.0875 3.22 10.25 0.1060 10734003 47 0.446 0.049 0.1234 2.90 8.52 0.1463 10734003 48 0.495 0.047 0.1817 2.30 8.52 0.2123 10734003 49 0.545 0.046 0.2432 1.96 5.74 0.2812 10734003 50 0.592 0.045 0.312 1.82 4.85 0.358 10734003 51 0.693 0.042 0.483 1.52 4.44 0.549 10734003 52 0.791 0.040 0.710 1.90 3.48 0.808 10734003 53 0.889 0.039 0.954 1.18 2.25 1.110 10734003 54 0.987 0.038 1.113 1.22 1.87 1.355 10734003 55 1.156 0.036 1.282 1.02 1.50 1.559 10734003 56 1.233 0.071 1.131 1.03 2.50 1.382 10734003 57 1.330 0.068 1.164 1.02 1.66 1.433 10734003 58 1.429 0.067 1.117 1.03 1.48 1.387 10734003 59 1.528 0.065 1.096 0.99 1.43 1.375 10734003 60 1.626 0.063 1.126 1.01 1.45 1.427 10734003 61 1.772 0.062 1.104 1.03 1.45 1.418 10734003 62 1.821 0.061 1.104 1.03 1.45 1.423 10734003 63 1.920 0.060 1.132 1.03 1.45 1.465 10734003 64 1.984 0.118 1.133 0.38 1.09 1.469 10734003 65 2.241 0.110 1.101 0.39 1.09 1.419 10734003 66 2.490 0.105 1.092 0.41 1.11 1.386 10734003 67 2.736 0.100 1.098 0.39 1.09 1.368 10734003 68 2.982 0.095 1.133 0.38 1.11 1.383 10734003 69 3.231 0.090 1.138 1.10 1.50 1.363 10734003 70 3.480 0.085 1.148 2.02 1.41 1.350 10734003 71 3.726 0.081 1.125 1.01 1.46 1.298 10734003 72 3.972 0.079 1.147 1.33 1.72 1.300 10734003 73 4.479 0.075 1.093 1.06 1.65 1.216 10734003 74 4.623 0.295 1.101 1.09 1.49 1.210 10734003 75 4.728 0.074 1.109 0.96 1.74 1.208 10734003 76 5.025 0.254 1.094 1.06 1.48 1.162 10734003 77 5.320 0.223 1.142 1.06 1.66 1.196 10734003 78 5.603 0.205 1.216 1.05 1.70 1.275 10734003 79 5.963 0.187 1.265 1.06 1.59 1.393 10734003 80 6.150 0.177 1.348 1.15 1.55 1.595 10734003 81 6.415 0.166 1.284 1.14 1.61 1.688 10734003 82 6.676 0.154 1.262 1.15 1.60 1.823 10734003 83 6.937 0.145 1.209 1.06 1.52 1.852 10734003 84 7.193 0.137 1.195 1.17 1.57 1.912 10734003 85 7.449 0.132 1.125 1.12 1.52 1.917 10734003 86 7.701 0.128 1.122 1.12 1.52 1.968 10734003 87 7.953 0.126 1.117 1.05 1.46 1.986 10734003 88 8.201 0.124 1.105 1.10 1.50 1.871 10734003 89 8.696 0.120 1.091 1.20 1.57 1.939 10734003 90 8.940 0.120 1.085 1.20 1.57 1.923 10734003 91 9.185 0.120 1.107 1.14 1.53 1.957 10734003 92 9.431 0.120 1.095 1.14 1.53 1.930 10734003 93 9.673 0.121 1.084 1.14 1.53 1.904 10734003 94 9.923 0.122 1.078 1.20 1.59 1.887 10734003 95 ENDDATA 51 0 10734003 96 ENDSUBENT 95 0 1073400399999 ENDENTRY 3 0 1073499999999