ENTRY 20869 20190722 22812086900000001 SUBENT 20869001 20190722 22812086900100001 BIB 11 31 2086900100002 TITLE Fission cross section ratio measurement of 238U to 2086900100003 235U for neutrons with energies between 4.7 and 2086900100004 8.9 MeV 2086900100005 AUTHOR (C.Nordborg, H.Conde, L.G.Stroemberg) 2086900100006 INSTITUTE (2SWDUPP,2SWDFOA) 2086900100007 REFERENCE (C,76ANL,,128,1976) 2086900100008 FACILITY (VDGT,2SWDUPP) 6 MV EN-tpe tandem accelerator 2086900100009 INC-SOURCE (P-T) Tritium gas in a cell (26 mm long, 10 mm diam., 2086900100010 ~1.5 atm. 2086900100011 SAMPLE 238U: Natural uranium oxide (~1 mg/cm2 thick) 2086900100012 235U: UF4 (97% 235U + 3% 238U, ~1 mg/cm2 thick) 2086900100013 METHOD (TOF) To monitor spectrum of incident neutrons. 2086900100014 Time resolution 5-7 nsec. 2086900100015 DETECTOR (FISCH) Back-to-back fission ionization chamber 2086900100016 (SCIN) Plastic scintillator as neutron monitor 2086900100017 CORRECTION Corrected for 2086900100018 - low energy neutrons (1-1.5%), 2086900100019 - bias setting (<0.1%), 2086900100020 - detector efficiency (~1%), 2086900100021 - solid angle (0.7%), 2086900100022 - isotopic composition (0.1-0.6%), 2086900100023 - scattered neutrons (0.5%). 2086900100024 Total correction to be applied was 3%. 2086900100025 HISTORY (19790409C) CN. 2086900100026 (20071218A) Date is corrected. 2086900100027 DATA-ERR changed to ERR-S 2086900100028 (20160702U) M.M. Refs. KDK-23, KDK-12, 76ANL checked, 2086900100029 BIB information was updated. 2086900100030 Digitized data were added in Subents 003,004. 2086900100031 (20190722A) On. ERR-1 and ERR-2 moved to 002. 2086900100032 Progress reports deleted from REFERENCE. 2086900100033 ENDBIB 31 0 2086900100034 NOCOMMON 0 0 2086900100035 ENDSUBENT 34 0 2086900199999 SUBENT 20869002 20190722 22812086900200001 BIB 3 5 2086900200002 REACTION ((92-U-238(N,F),,SIG)/(92-U-235(N,F),,SIG)) 2086900200003 ERR-ANALYS (ERR-S) Statistical error 2086900200004 (ERR-1) Mass determination (1.3%) 2086900200005 (ERR-2) Low energy neutron flux calculation (1%) 2086900200006 STATUS (TABLE) Table 1 of C,76ANL,,128,1976 2086900200007 ENDBIB 5 0 2086900200008 COMMON 3 3 2086900200009 EN-RSL ERR-1 ERR-2 2086900200010 MEV PER-CENT PER-CENT 2086900200011 5.E-02 1.3 1. 2086900200012 ENDCOMMON 3 0 2086900200013 DATA 3 23 2086900200014 EN DATA ERR-S 2086900200015 MEV NO-DIM NO-DIM 2086900200016 4.67 0.503 0.014 2086900200017 4.96 0.510 0.014 2086900200018 5.26 0.499 0.013 2086900200019 5.55 0.528 0.014 2086900200020 5.73 0.548 0.010 2086900200021 5.85 0.575 0.015 2086900200022 6.02 0.561 0.015 2086900200023 6.14 0.590 0.017 2086900200024 6.31 0.597 0.015 2086900200025 6.43 0.600 0.017 2086900200026 6.60 0.621 0.017 2086900200027 6.73 0.632 0.016 2086900200028 6.89 0.611 0.016 2086900200029 7.02 0.606 0.015 2086900200030 7.18 0.597 0.014 2086900200031 7.31 0.598 0.015 2086900200032 7.60 0.581 0.015 2086900200033 7.76 0.571 0.015 2086900200034 7.89 0.575 0.016 2086900200035 8.04 0.570 0.014 2086900200036 8.33 0.577 0.014 2086900200037 8.37 0.579 0.015 2086900200038 8.85 0.587 0.014 2086900200039 ENDDATA 25 0 2086900200040 ENDSUBENT 39 0 2086900299999 SUBENT 20869003 20190722 22812086900300001 BIB 5 10 2086900300002 REACTION (92-U-235(N,F),,DA,FF,RSD) 2086900300003 DETECTOR (TRD) Scattering chamber with macrofol plastic 2086900300004 detector for fission fragment angular distribution 2086900300005 ERR-ANALYS (ERR-DIG) Quantization error (1 px) = 0.0008 2086900300006 (DATA-ERR) No information on the source of uncertainty 2086900300007 (ERR-S,2.,3.) Statistical uncertainty 2-3% 2086900300008 STATUS (CURVE) Fig.5 of C,76ANL,,128,1976 2086900300009 HISTORY (20160702A) M.M. Digitized data were added. 2086900300010 RSD was added in REACTION. 2086900300011 (20190722A) On. ANG-ERR-D deleted. DETECTOR added. 2086900300012 ENDBIB 10 0 2086900300013 COMMON 1 3 2086900300014 ERR-DIG 2086900300015 NO-DIM 2086900300016 0.001 2086900300017 ENDCOMMON 3 0 2086900300018 DATA 4 40 2086900300019 EN ANG DATA DATA-ERR 2086900300020 MEV ADEG NO-DIM NO-DIM 2086900300021 8.75 0. 1.367 2086900300022 8.75 10. 1.389 2086900300023 8.75 20. 1.296 2086900300024 8.75 30. 1.298 2086900300025 8.75 40. 1.226 2086900300026 8.75 50. 1.207 0.032 2086900300027 8.75 60. 1.110 2086900300028 8.75 70. 1.091 2086900300029 8.75 80. 1.058 2086900300030 8.75 90. 1.002 2086900300031 7.75 0. 1.340 2086900300032 7.75 10. 1.310 2086900300033 7.75 20. 1.247 2086900300034 7.75 30. 1.280 2086900300035 7.75 40. 1.145 2086900300036 7.75 50. 1.101 0.033 2086900300037 7.75 60. 1.107 2086900300038 7.75 70. 1.013 2086900300039 7.75 80. 1.038 2086900300040 7.75 90. 1.004 2086900300041 6.75 0. 1.298 2086900300042 6.75 10. 1.275 2086900300043 6.75 20. 1.211 2086900300044 6.75 30. 1.217 2086900300045 6.75 40. 1.167 2086900300046 6.75 50. 1.126 0.037 2086900300047 6.75 60. 1.065 2086900300048 6.75 70. 1.075 2086900300049 6.75 80. 1.015 2086900300050 6.75 90. 1.004 2086900300051 5.65 0. 1.235 2086900300052 5.65 10. 1.199 2086900300053 5.65 20. 1.171 2086900300054 5.65 30. 1.146 2086900300055 5.65 40. 1.105 2086900300056 5.65 50. 1.099 0.026 2086900300057 5.65 60. 1.078 2086900300058 5.65 70. 1.078 2086900300059 5.65 80. 1.033 2086900300060 5.65 90. 1.006 2086900300061 ENDDATA 42 0 2086900300062 ENDSUBENT 61 0 2086900399999 SUBENT 20869004 20190722 22812086900400001 BIB 5 10 2086900400002 REACTION (92-U-238(N,F),,DA,FF,RSD) 2086900400003 DETECTOR (TRD) Scattering chamber with macrofol plastic 2086900400004 detector for fission fragment angular distribution 2086900400005 ERR-ANALYS (ERR-DIG) Quantization error (1 px) = 0.0016 2086900400006 (DATA-ERR) No information on the source of uncertainty 2086900400007 (ERR-S,2.,3.) Statistical uncertainty 2-3% 2086900400008 STATUS (CURVE) Fig.6 of C,76ANL,,128,1976 2086900400009 HISTORY (20160702A) M.M. Digitized data were added. 2086900400010 RSD was added in REACTION. 2086900400011 (20190722A) On. ANG-ERR-D deleted. DETECTOR added. 2086900400012 ENDBIB 10 0 2086900400013 COMMON 1 3 2086900400014 ERR-DIG 2086900400015 NO-DIM 2086900400016 0.001 2086900400017 ENDCOMMON 3 0 2086900400018 DATA 4 40 2086900400019 EN ANG DATA DATA-ERR 2086900400020 MEV ADEG NO-DIM NO-DIM 2086900400021 8.75 0. 1.490 2086900400022 8.75 10. 1.533 2086900400023 8.75 20. 1.483 2086900400024 8.75 30. 1.432 2086900400025 8.75 40. 1.331 2086900400026 8.75 50. 1.271 0.031 2086900400027 8.75 60. 1.194 2086900400028 8.75 70. 1.186 2086900400029 8.75 80. 1.095 2086900400030 8.75 90. 1.016 2086900400031 7.75 0. 1.702 2086900400032 7.75 10. 1.686 2086900400033 7.75 20. 1.614 2086900400034 7.75 30. 1.463 2086900400035 7.75 40. 1.396 2086900400036 7.75 50. 1.284 0.027 2086900400037 7.75 60. 1.200 2086900400038 7.75 70. 1.133 2086900400039 7.75 80. 1.045 2086900400040 7.75 90. 1.003 2086900400041 6.75 0. 1.888 2086900400042 6.75 10. 1.813 2086900400043 6.75 20. 1.731 2086900400044 6.75 30. 1.634 2086900400045 6.75 40. 1.562 2086900400046 6.75 50. 1.398 0.053 2086900400047 6.75 60. 1.288 2086900400048 6.75 70. 1.204 2086900400049 6.75 80. 1.118 2086900400050 6.75 90. 1.006 2086900400051 5.65 0. 1.364 2086900400052 5.65 10. 1.279 2086900400053 5.65 20. 1.330 2086900400054 5.65 30. 1.212 2086900400055 5.65 40. 1.183 2086900400056 5.65 50. 1.113 0.043 2086900400057 5.65 60. 1.121 2086900400058 5.65 70. 1.100 2086900400059 5.65 80. 1.053 2086900400060 5.65 90. 1.006 2086900400061 ENDDATA 42 0 2086900400062 ENDSUBENT 61 0 2086900499999 ENDENTRY 4 0 2086999999999