ENTRY 12766 20201012 14721276600000001 SUBENT 12766001 20201012 14721276600100001 BIB 12 21 1276600100002 TITLE Neutron fission cross sections of 239Pu and 240Pu 1276600100003 relative to 235U 1276600100004 AUTHOR (L.W.Weston, J.H.Todd) 1276600100005 INSTITUTE (1USAORL) 1276600100006 REFERENCE (J,NSE,84,248,1983) 1276600100007 FACILITY (LINAC,1USAORL) ORELA 1276600100008 INC-SOURCE (PHOTO) Pulse width of 35 nsec 1276600100009 INC-SPECT Energy resolution FWHM(E)/E=0.051*sqrt(E) with E in MeV1276600100010 METHOD (TOF) Flight path to the first signal plate of 1276600100011 18.897+/-0.006 m 1276600100012 DETECTOR (FISCH) 1276600100013 (BF3) 1276600100014 CORRECTION Data are corrected for isotopic impurities, constant 1276600100015 and time dependent background. 1276600100016 STATUS (TABLE) Data from private communication, L.W.Weston 1276600100017 (1982-09-21) 1276600100018 (APRVD) Approved by L.W.Weston (1982-11-29) 1276600100019 HISTORY (19821102C) 1276600100020 (19830914A) Update for publication 1276600100021 (20170419A) On. Major alterations in 002 and 003. 1276600100022 (20201012A) On. Monitor corrected in 002. 1276600100023 ENDBIB 21 0 1276600100024 NOCOMMON 0 0 1276600100025 ENDSUBENT 24 0 1276600199999 SUBENT 12766002 20201012 14721276600200001 BIB 5 21 1276600200002 REACTION ((94-PU-239(N,F),,SIG,,AV)/(92-U-235(N,F),,SIG,,AV)) 1276600200003 MONITOR ((94-PU-239(N,F),,INT,,RTE)/(92-U-235(N,F),,INT,,RTE)) 1276600200004 A low-energy 239Pu(n,f)/235U(n,f) data set measured 1276600200005 for thermal normalization was normalized to 1.271 at 1276600200006 0.02-0.03 eV by adopting ENDF/B-V (741.7 and 583.5 b 1276600200007 for 239Pu and 235U(nth,f)). 1276600200008 This low-energy data set gives 0.731 at 100 to 1000 eV.1276600200009 SAMPLE - 2 deposits (4.72 mg in total) of high isotopic 1276600200010 purity 239Pu 1276600200011 - 2 deposits (3.86 mg in total) of high isotopic 1276600200012 purity 235U 1276600200013 ERR-ANALYS (ERR-S) Statistical uncertainty 1276600200014 (MONIT-ERR,,,F) 239Pu(nth,f)/235U(nth,f) (0.8%) 1276600200015 (ERR-1,,,F) 239Pu/235U normalization statistics (1.7%) 1276600200016 (ERR-2,,,F) Secondary normalization (0.5%) 1276600200017 (ERR-3,,,P) Uncertainty due to time dependent 1276600200018 background. The correlation coefficient is exp(-E/5). 1276600200019 where E is the energy difference in MeV. 1276600200020 (DATA-ERR) Total uncertainty excluding normalization 1276600200021 HISTORY (20170419A) On. MONITOR and ERR-ANALYS updated 1276600200022 (20201012A) On. MONITOR and MONIT updated 1276600200023 ENDBIB 21 0 1276600200024 COMMON 6 3 1276600200025 EN-NRM-MIN EN-NRM-MAX MONIT MONIT-ERR ERR-1 ERR-2 1276600200026 EV NO-DIM NO-DIM PER-CENT PER-CENT PER-CENT 1276600200027 100. 1000. 0.731 0.8 1.7 0.5 1276600200028 ENDCOMMON 3 0 1276600200029 DATA 5 122 1276600200030 EN-MEAN DATA ERR-S ERR-3 DATA-ERR 1276600200031 MEV NO-DIM PER-CENT PER-CENT PER-CENT 1276600200032 0.0057 0.636 0.4 0.3 0.5 1276600200033 0.0072 0.616 0.4 0.3 0.5 1276600200034 0.0093 0.651 0.4 0.3 0.5 1276600200035 0.0125 0.656 0.4 0.3 0.5 1276600200036 0.0157 0.710 0.6 0.3 0.6 1276600200037 0.0177 0.693 0.6 0.3 0.6 1276600200038 0.0202 0.751 0.5 0.3 0.6 1276600200039 0.0232 0.708 0.5 0.3 0.6 1276600200040 0.0270 0.724 0.5 0.3 0.6 1276600200041 0.0317 0.777 0.5 0.3 0.6 1276600200042 0.0378 0.780 0.4 0.3 0.5 1276600200043 0.0459 0.816 0.4 0.3 0.5 1276600200044 0.0529 0.796 0.7 0.3 0.7 1276600200045 0.0569 0.855 0.6 0.3 0.7 1276600200046 0.0615 0.870 0.6 0.3 0.7 1276600200047 0.0666 0.868 0.6 0.3 0.7 1276600200048 0.0724 0.881 0.6 0.3 0.7 1276600200049 0.0789 0.919 0.6 0.3 0.7 1276600200050 0.0864 0.927 0.6 0.3 0.7 1276600200051 0.0951 0.924 0.7 0.3 0.7 1276600200052 0.1016 0.933 1.7 0.3 1.7 1276600200053 0.1051 0.953 1.8 0.3 1.8 1276600200054 0.1088 0.993 1.6 0.3 1.6 1276600200055 0.1126 0.994 1.6 0.3 1.6 1276600200056 0.1167 0.978 1.3 0.3 1.3 1276600200057 0.1211 0.986 1.1 0.3 1.1 1276600200058 0.1256 0.985 1.1 0.3 1.1 1276600200059 0.1305 1.000 1.0 0.3 1.0 1276600200060 0.1356 0.997 1.0 0.3 1.0 1276600200061 0.1410 1.052 1.0 0.3 1.0 1276600200062 0.1467 1.021 0.9 0.3 1.0 1276600200063 0.1528 1.057 0.9 0.3 0.9 1276600200064 0.1593 1.051 0.9 0.3 0.9 1276600200065 0.1663 1.043 0.9 0.3 0.9 1276600200066 0.1736 1.046 0.8 0.3 0.9 1276600200067 0.1815 1.046 0.8 0.3 0.9 1276600200068 0.1900 1.055 0.8 0.3 0.9 1276600200069 0.1990 1.044 0.9 0.3 0.9 1276600200070 0.2087 1.155 0.8 0.3 0.9 1276600200071 0.2191 1.120 0.8 0.3 0.8 1276600200072 0.2304 1.149 0.8 0.3 0.8 1276600200073 0.2425 1.138 0.7 0.3 0.8 1276600200074 0.2556 1.172 0.7 0.3 0.8 1276600200075 0.2698 1.201 0.7 0.3 0.8 1276600200076 0.2852 1.247 0.7 0.3 0.8 1276600200077 0.3019 1.224 0.7 0.3 0.7 1276600200078 0.3202 1.235 0.7 0.3 0.7 1276600200079 0.3402 1.218 0.6 0.3 0.7 1276600200080 0.3621 1.245 0.6 0.3 0.7 1276600200081 0.3862 1.271 0.6 0.3 0.7 1276600200082 0.4128 1.283 0.6 0.3 0.7 1276600200083 0.4423 1.336 0.6 0.3 0.7 1276600200084 0.4750 1.353 0.6 0.3 0.6 1276600200085 0.4989 1.345 0.9 0.3 1.0 1276600200086 0.5115 1.336 0.9 0.3 1.0 1276600200087 0.5246 1.349 1.0 0.3 1.0 1276600200088 0.5382 1.429 1.0 0.3 1.0 1276600200089 0.5524 1.386 1.0 0.3 1.0 1276600200090 0.5671 1.381 1.0 0.3 1.0 1276600200091 0.5824 1.407 1.0 0.3 1.0 1276600200092 0.5984 1.434 1.0 0.3 1.0 1276600200093 0.6150 1.452 1.0 0.3 1.1 1276600200094 0.6323 1.437 1.0 0.3 1.0 1276600200095 0.6503 1.464 0.9 0.3 1.0 1276600200096 0.6692 1.456 0.9 0.3 1.0 1276600200097 0.6889 1.403 0.9 0.3 1.0 1276600200098 0.7094 1.425 1.0 0.3 1.0 1276600200099 0.7309 1.511 1.0 0.3 1.0 1276600200100 0.7533 1.532 0.9 0.3 1.0 1276600200101 0.7769 1.514 0.9 0.3 1.0 1276600200102 0.8015 1.517 0.9 0.3 1.0 1276600200103 0.8274 1.499 0.9 0.3 1.0 1276600200104 0.8545 1.447 0.9 0.3 1.0 1276600200105 0.8829 1.470 1.0 0.3 1.0 1276600200106 0.9128 1.415 1.0 0.3 1.0 1276600200107 0.9443 1.435 1.0 0.3 1.0 1276600200108 0.9774 1.381 1.0 0.3 1.0 1276600200109 1.0123 1.431 1.0 0.3 1.0 1276600200110 1.0491 1.457 1.0 0.3 1.0 1276600200111 1.0879 1.494 1.0 0.3 1.0 1276600200112 1.1289 1.512 1.0 0.3 1.0 1276600200113 1.1723 1.511 0.9 0.3 1.0 1276600200114 1.2183 1.499 0.9 0.3 1.0 1276600200115 1.2670 1.493 1.0 0.3 1.0 1276600200116 1.3186 1.508 1.0 0.3 1.1 1276600200117 1.3736 1.568 1.0 0.3 1.1 1276600200118 1.4320 1.539 1.0 0.3 1.1 1276600200119 1.4942 1.547 1.1 0.3 1.1 1276600200120 1.5606 1.507 1.1 0.3 1.1 1276600200121 1.6315 1.534 1.1 0.3 1.2 1276600200122 1.7074 1.550 1.2 0.3 1.2 1276600200123 1.7886 1.539 1.2 0.3 1.2 1276600200124 1.8759 1.489 1.2 0.3 1.2 1276600200125 1.9697 1.472 1.3 0.3 1.3 1276600200126 2.0707 1.511 1.4 0.3 1.4 1276600200127 2.1797 1.535 1.4 0.3 1.4 1276600200128 2.2975 1.536 1.3 0.3 1.4 1276600200129 2.4252 1.536 1.4 0.3 1.4 1276600200130 2.5638 1.482 1.4 0.3 1.4 1276600200131 2.7147 1.466 1.5 0.3 1.5 1276600200132 2.8793 1.471 1.6 0.3 1.6 1276600200133 3.0594 1.563 1.6 0.3 1.6 1276600200134 3.2570 1.486 1.5 0.3 1.6 1276600200135 3.4743 1.486 1.6 0.3 1.6 1276600200136 3.7143 1.495 1.7 0.3 1.7 1276600200137 3.9800 1.517 1.7 0.3 1.7 1276600200138 4.2754 1.528 1.8 0.3 1.8 1276600200139 4.6050 1.604 1.8 0.3 1.8 1276600200140 4.9744 1.563 1.7 0.3 1.8 1276600200141 5.3902 1.563 1.8 0.3 1.8 1276600200142 5.8606 1.584 1.7 0.3 1.8 1276600200143 6.3956 1.520 1.7 0.3 1.7 1276600200144 7.0077 1.316 1.6 0.3 1.7 1276600200145 7.7124 1.350 1.6 0.3 1.6 1276600200146 8.5296 1.192 1.6 0.3 1.6 1276600200147 9.4846 1.242 1.7 0.3 1.8 1276600200148 10.6106 1.196 1.9 0.3 2.0 1276600200149 11.9512 1.271 2.1 0.3 2.1 1276600200150 13.5651 1.112 2.3 0.3 2.3 1276600200151 15.5326 1.102 2.4 0.3 2.4 1276600200152 17.9666 1.093 2.7 0.3 2.7 1276600200153 21.0289 1.030 3.0 0.3 3.0 1276600200154 ENDDATA 124 0 1276600200155 ENDSUBENT 154 0 1276600299999 SUBENT 12766003 20170419 14271276600300001 BIB 5 20 1276600300002 REACTION ((94-PU-240(N,F),,SIG,,AV)/(94-PU-239(N,F),,SIG,,AV)) 1276600300003 MONITOR ((94-PU-240(N,F),,SIG)/(94-PU-239(N,F),,SIG)) 1276600300004 SAMPLE - 14 deposits (35.62 mg in total) of high isotopic 1276600300005 purity 240Pu 1276600300006 - 2 deposits (4.27 mg in total) of an enriched 240Pu 1276600300007 (95% 240Pu+4% 239Pu) 1276600300008 - 2 deposits (4.72 mg in total) of high isotopic 1276600300009 purity 239Pu 1276600300010 ERR-ANALYS (ERR-S) Statistical uncertainty 1276600300011 (MONIT-ERR,,,F) 239Pu(nth,f)/235U(nth,f) (0.8%) 1276600300012 (ERR-1,,,F) 239Pu/235U normalization statistics (1.7%) 1276600300013 (ERR-2,,,F) Secondary normalization (0.5%) 1276600300014 (ERR-3,,,P) Uncertainty due to time dependent 1276600300015 background. The correlation coefficient is exp(-E/5). 1276600300016 (ERR-4,,,F) Uncertainty due to constant background 1276600300017 correction fully correlated with energy. 1276600300018 where E is the energy difference in MeV. 1276600300019 (ERR-5) Normalization to 239Pu(n,f) (0.7%) 1276600300020 (DATA-ERR) Total uncertainty excluding normalization 1276600300021 HISTORY (20170419A) On. MONITOR and ERR-ANALYS updated 1276600300022 ENDBIB 20 0 1276600300023 COMMON 4 3 1276600300024 MONIT-ERR ERR-1 ERR-2 ERR-5 1276600300025 PER-CENT PER-CENT PER-CENT PER-CENT 1276600300026 0.8 1.7 0.5 0.7 1276600300027 ENDCOMMON 3 0 1276600300028 DATA 6 122 1276600300029 EN-MEAN DATA ERR-S ERR-3 ERR-4 DATA-ERR 1276600300030 MEV NO-DIM PER-CENT PER-CENT PER-CENT PER-CENT 1276600300031 0.0057 0.0331 0.8 0.3 2.0 2.2 1276600300032 0.0072 0.0487 0.6 0.3 1.4 1.5 1276600300033 0.0093 0.0239 0.9 0.3 2.3 2.5 1276600300034 0.0125 0.0735 0.4 0.3 0.7 0.9 1276600300035 0.0157 0.0464 0.8 0.3 0.9 1.3 1276600300036 0.0177 0.0391 0.9 0.3 1.0 1.4 1276600300037 0.0202 0.0769 0.6 0.3 0.5 0.8 1276600300038 0.0232 0.0442 0.7 0.3 0.7 1.1 1276600300039 0.0270 0.0710 0.6 0.3 0.4 0.8 1276600300040 0.0317 0.0790 0.5 0.3 0.3 0.7 1276600300041 0.0378 0.0816 0.5 0.3 0.3 0.6 1276600300042 0.0459 0.0661 0.5 0.3 0.3 0.6 1276600300043 0.0529 0.0326 1.0 0.3 0.6 1.2 1276600300044 0.0569 0.0386 0.9 0.3 0.4 1.0 1276600300045 0.0615 0.0500 0.7 0.3 0.3 0.8 1276600300046 0.0666 0.0713 0.6 0.3 0.2 0.7 1276600300047 0.0724 0.0504 0.7 0.3 0.3 0.8 1276600300048 0.0789 0.0591 0.7 0.3 0.3 0.8 1276600300049 0.0864 0.0681 0.6 0.3 0.2 0.7 1276600300050 0.0951 0.0477 0.8 0.3 0.4 0.9 1276600300051 0.1016 0.0430 2.2 0.3 0.8 2.4 1276600300052 0.1051 0.0441 2.4 0.3 0.9 2.6 1276600300053 0.1088 0.0440 2.0 0.3 0.6 2.1 1276600300054 0.1126 0.0415 2.1 0.3 0.7 2.3 1276600300055 0.1167 0.0519 1.4 0.3 0.4 1.5 1276600300056 0.1211 0.0396 1.4 0.3 0.4 1.4 1276600300057 0.1256 0.0515 1.2 0.3 0.3 1.2 1276600300058 0.1305 0.0572 1.0 0.3 0.2 1.1 1276600300059 0.1356 0.0637 0.9 0.3 0.2 1.0 1276600300060 0.1410 0.0608 0.9 0.3 0.2 1.0 1276600300061 0.1467 0.0491 1.0 0.3 0.2 1.1 1276600300062 0.1528 0.0521 0.9 0.3 0.2 1.0 1276600300063 0.1593 0.0407 1.0 0.3 0.2 1.1 1276600300064 0.1663 0.0576 0.9 0.3 0.1 0.9 1276600300065 0.1736 0.0513 0.9 0.3 0.2 0.9 1276600300066 0.1815 0.0532 0.8 0.3 0.1 0.9 1276600300067 0.1900 0.0521 0.8 0.3 0.1 0.9 1276600300068 0.1990 0.0563 0.9 0.3 0.1 0.9 1276600300069 0.2087 0.0633 0.8 0.3 0.1 0.8 1276600300070 0.2191 0.0713 0.7 0.3 0.1 0.8 1276600300071 0.2304 0.0571 0.7 0.3 0.1 0.8 1276600300072 0.2425 0.0579 0.7 0.3 0.1 0.8 1276600300073 0.2556 0.0698 0.6 0.3 0.1 0.7 1276600300074 0.2698 0.0751 0.6 0.3 0.1 0.7 1276600300075 0.2852 0.0811 0.6 0.3 0.1 0.7 1276600300076 0.3019 0.0812 0.6 0.3 0.1 0.6 1276600300077 0.3202 0.0919 0.5 0.3 0.0 0.6 1276600300078 0.3402 0.1034 0.5 0.3 0.0 0.6 1276600300079 0.3621 0.1110 0.5 0.3 0.0 0.6 1276600300080 0.3862 0.1146 0.5 0.3 0.0 0.6 1276600300081 0.4128 0.1396 0.4 0.3 0.0 0.5 1276600300082 0.4423 0.1667 0.4 0.3 0.0 0.5 1276600300083 0.4750 0.2158 0.4 0.3 0.0 0.5 1276600300084 0.4989 0.2375 0.6 0.3 0.0 0.7 1276600300085 0.5115 0.2721 0.6 0.3 0.0 0.7 1276600300086 0.5246 0.3184 0.6 0.3 0.0 0.7 1276600300087 0.5382 0.3113 0.6 0.3 0.0 0.7 1276600300088 0.5524 0.3469 0.6 0.3 0.0 0.7 1276600300089 0.5671 0.3871 0.6 0.3 0.0 0.7 1276600300090 0.5824 0.4093 0.6 0.3 0.0 0.7 1276600300091 0.5984 0.4335 0.6 0.3 0.0 0.7 1276600300092 0.6150 0.4642 0.6 0.3 0.0 0.7 1276600300093 0.6323 0.4931 0.6 0.3 0.0 0.6 1276600300094 0.6503 0.5307 0.5 0.3 0.0 0.6 1276600300095 0.6692 0.5502 0.5 0.3 0.0 0.6 1276600300096 0.6889 0.5931 0.5 0.3 0.0 0.6 1276600300097 0.7094 0.6045 0.5 0.3 0.0 0.6 1276600300098 0.7309 0.5902 0.5 0.3 0.0 0.6 1276600300099 0.7533 0.6125 0.5 0.3 0.0 0.6 1276600300100 0.7769 0.6491 0.5 0.3 0.0 0.6 1276600300101 0.8015 0.6885 0.5 0.3 0.0 0.6 1276600300102 0.8274 0.7204 0.5 0.3 0.0 0.6 1276600300103 0.8545 0.7742 0.5 0.3 0.0 0.6 1276600300104 0.8829 0.8093 0.5 0.3 0.0 0.6 1276600300105 0.9128 0.8469 0.5 0.3 0.0 0.6 1276600300106 0.9443 0.8750 0.5 0.3 0.0 0.6 1276600300107 0.9774 0.9060 0.5 0.3 0.0 0.6 1276600300108 1.0123 0.8865 0.5 0.3 0.0 0.6 1276600300109 1.0491 0.8859 0.5 0.3 0.0 0.6 1276600300110 1.0879 0.8686 0.5 0.3 0.0 0.6 1276600300111 1.1289 0.8574 0.5 0.3 0.0 0.6 1276600300112 1.1723 0.8337 0.5 0.3 0.0 0.6 1276600300113 1.2183 0.8525 0.5 0.3 0.0 0.6 1276600300114 1.2670 0.8564 0.5 0.3 0.0 0.6 1276600300115 1.3186 0.8556 0.6 0.3 0.0 0.6 1276600300116 1.3736 0.8284 0.6 0.3 0.0 0.6 1276600300117 1.4320 0.8485 0.6 0.3 0.0 0.6 1276600300118 1.4942 0.8485 0.6 0.3 0.0 0.6 1276600300119 1.5606 0.8709 0.6 0.3 0.0 0.7 1276600300120 1.6315 0.8555 0.6 0.3 0.0 0.7 1276600300121 1.7074 0.8620 0.6 0.3 0.0 0.7 1276600300122 1.7886 0.8492 0.6 0.3 0.0 0.7 1276600300123 1.8759 0.9051 0.7 0.3 0.0 0.7 1276600300124 1.9697 0.9075 0.7 0.3 0.0 0.8 1276600300125 2.0707 0.9089 0.7 0.3 0.0 0.8 1276600300126 2.1797 0.8619 0.7 0.3 0.0 0.8 1276600300127 2.2975 0.8867 0.7 0.3 0.0 0.8 1276600300128 2.4252 0.8788 0.7 0.3 0.0 0.8 1276600300129 2.5638 0.9255 0.8 0.3 0.0 0.8 1276600300130 2.7147 0.9397 0.8 0.3 0.0 0.9 1276600300131 2.8793 0.9389 0.9 0.3 0.0 0.9 1276600300132 3.0594 0.8825 0.8 0.3 0.0 0.9 1276600300133 3.2570 0.9527 0.8 0.3 0.0 0.9 1276600300134 3.4743 0.9557 0.9 0.3 0.0 0.9 1276600300135 3.7143 0.9500 0.9 0.3 0.0 1.0 1276600300136 3.9800 0.9226 0.9 0.3 0.0 1.0 1276600300137 4.2754 0.9152 1.0 0.3 0.0 1.0 1276600300138 4.6050 0.8914 0.9 0.3 0.0 1.0 1276600300139 4.9744 0.8860 0.9 0.3 0.0 1.0 1276600300140 5.3902 0.9042 0.9 0.3 0.0 1.0 1276600300141 5.8606 0.9005 0.9 0.3 0.0 1.0 1276600300142 6.3956 0.9277 0.9 0.3 0.0 0.9 1276600300143 7.0077 0.9596 0.9 0.3 0.0 1.0 1276600300144 7.7124 0.9530 0.9 0.3 0.0 0.9 1276600300145 8.5296 1.0601 0.9 0.3 0.0 1.0 1276600300146 9.4846 1.0361 1.0 0.3 0.0 1.0 1276600300147 10.6106 1.0744 1.1 0.3 0.0 1.2 1276600300148 11.9512 0.9933 1.2 0.3 0.0 1.2 1276600300149 13.5651 1.0387 1.4 0.3 0.0 1.4 1276600300150 15.5326 1.0098 1.5 0.3 0.0 1.5 1276600300151 17.9666 1.0474 1.6 0.3 0.0 1.6 1276600300152 21.0289 1.1052 1.8 0.3 0.0 1.9 1276600300153 ENDDATA 124 0 1276600300154 ENDSUBENT 153 0 1276600399999 ENDENTRY 3 0 1276699999999