ENTRY 40921 20141014 41654092100000001 SUBENT 40921001 20141014 41654092100100001 BIB 13 59 4092100100002 TITLE Measurement of the neutron-induced fission cross 4092100100003 section ratios of 236U and 235U for energies of 4092100100004 4 - 11 MeV. 4092100100005 AUTHOR (A.A.Goverdovskii,A.K.Gordyushin,B.D.Kuz'minov, 4092100100006 A.I.Sergachev,V.F.Mitrofanov,S.M.Solov'ev, 4092100100007 T.E.Kuz'mina) 4092100100008 INSTITUTE (4RUSFEI) 4092100100009 REFERENCE (J,AE,59,(6),429,1985) Data table is given 4092100100010 (J,SJA,59,1004,1985) Engl.translation of AE,59,(6),429.4092100100011 REL-REF (M,40832001,A.Goverdovskii+,S,IAEA-TECDOC-336,315,1985)4092100100012 IAEA-TECDOC-336 - Proc.of 84UPPSAL. 4092100100013 Method of corrections. 4092100100014 (N,40835001,A.A.Goverdovskii+,J,YK,1984,(3/57),13,1984)4092100100015 Method of isotopes admixtures. 4092100100016 MONITOR Absolute measurements of the cross-sections ratio. 4092100100017 Energy normalization of cross-section ratio was done by4092100100018 method of isotopes admixtures; normalization 4092100100019 coefficients were defined from ratios U6/U8 measured by4092100100020 highly enriched samples and samples with other isotopes4092100100021 admixtures to be 4092100100022 1.142+-0.008, 1.157+-0.008, 1.138+-0.008 for energies 4092100100023 7.34 MeV, 8.10 MeV, 8.91 MeV, respectively. 4092100100024 FACILITY (VDG,4RUSFEI) Accelerator EGP-10M 4092100100025 DETECTOR (IOCH) Double ionization chamber filled with 4092100100026 argon-methane mixture at 1.4*10**5 Pa pressure. 4092100100027 INC-SOURCE (D-D) Deuterium gas target at 1-1.2 10**5 Pa pressure.4092100100028 SAMPLE Uranium oxides on aluminum backings. Six samples. 4092100100029 Sample No.1- Thickness .41+-.04 milligram/cm**2, 4092100100030 content of U-234 -.002 % , U-235 - 99.992+-.001 % , 4092100100031 U-236 - .004 % , U-238 - .002 % . 4092100100032 Sample No.2 - Thickness .49+-.05 milligram/cm**2, 4092100100033 content of U-234 -.0001 % , U-235 -.041+-.002 % , 4092100100034 U-236 - 99.845+-.005 % , U-238 - .101+-.002 % . 4092100100035 Sample No.3 - Thickness 0.258+-.026 milligram/cm**2, 4092100100036 content of U-234 -.002+-.0005 % , U-235 - 99.992+- 4092100100037 .001 % , U-236 -.004+-.0005 % , U-238 -.002+-.0005 %.4092100100038 Sample No.4 - Thickness 0.198+-.02 milligram/cm**2, 4092100100039 content of U-235 IS 3.002+-.009 % , U-236 - 96.87+- 4092100100040 .10 % , U-238 - .13+-.02 % . 4092100100041 Sample No.5 - Thickness 0.198+-.020 milligram/cm**2, 4092100100042 content of U-235 IS 4.913+-.015 % , 4092100100043 U-236 - 94.90+-.09% , U-238 - .13+-.02 % . 4092100100044 Sample No.6 - Thickness 0.198+-.020 milligram/cm**2, 4092100100045 content of U-235 IS 6.943+-.003 % , 4092100100046 U-236 - 92.929+-.003 % , U-238 - 0.127+-.002 %. 4092100100047 Samples were stacked by backings. 4092100100048 Isotopic content was defined by mass-spectrometry. 4092100100049 Sample inhomogenity was defined by Si semiconductor 4092100100050 alpha-detector. 4092100100051 METHOD (TOF) Flight path 0.7m, time resolution 3-4 ns (FWHM). 4092100100052 STATUS (APRVD) Goverdovskii, 1987-07-07 . 4092100100053 (COREL,40832001) Entry 40832 - previous publications of4092100100054 this experiment. 4092100100055 HISTORY (19870708C) Compiled at the CJD 4092100100056 (20090407A) M.M. BIB information was added. 4092100100057 Free text was corrected to be human-readable. 4092100100058 Dates were corrected for 4-digits year. 4092100100059 (20141014A) Engl.translation ref. was added. 4092100100060 The article was checked, BIB information was updated. 4092100100061 ENDBIB 59 0 4092100100062 NOCOMMON 0 0 4092100100063 ENDSUBENT 62 0 4092100199999 SUBENT 40921002 20141014 41654092100200001 BIB 6 29 4092100200002 REACTION ((92-U-236(N,F),,SIG)/(92-U-235(N,F),,SIG)) 4092100200003 ANALYSIS Energy dependence of ratio was normalized by absolute 4092100200004 measurement of ratio at energies 7.34, 8.10, 9.91 MeV.4092100200005 CORRECTION On fiss.fragments deceleration in sample 0.2-0.3 % , 4092100200006 On the scattered neutrons background 0.25 % , 4092100200007 On registration efficiency difference for U-235 and 4092100200008 U-236 0.3 - 0.4 % 4092100200009 On neutron flux inhomogenity 1. - 1.7 % 4092100200010 On the experimental hall background and registration 4092100200011 electron circuit instability 1. % 4092100200012 On admixture isotopes fission 0.15 % 4092100200013 ERR-ANALYS (ERR-T) Total error includes: 4092100200014 (ERR-S) Statistical error - 0.6 - 1.2 % . 4092100200015 (ERR-1,0.6,0.8) Error due to the U-235/U-236 4092100200016 registration efficiency difference - 0.6-0.8%.4092100200017 (ERR-3) Error due to the neutron flux inhomogenity . 44092100200018 (ERR-4) Error due to the experimental hall background 4092100200019 and electron registration circuit 4092100200020 instability . 4092100200021 (ERR-5) Uncertainty of normalization of energy 4092100200022 (ERR-6,0.1,0.6) Uncertainty of neutron backgrounds. 4092100200023 dependence in normalization points - 0.51 % . 4092100200024 STATUS (TABLE) Table 2 of AE,59,(6),429,1985 . 4092100200025 (COREL,40832003) 40832.003 is superseded by 40921.002. 4092100200026 HISTORY (20090407A) ERR-1 and ERR-2 were moved in free text as 4092100200027 max and min errors. ERR-5 was added. 4092100200028 (20141014A) ERR-ANALYS was corrected according to 4092100200029 new rules. 4092100200030 EN-RSL-FW units were corrected MEV -> KEV. 4092100200031 ENDBIB 29 0 4092100200032 COMMON 3 3 4092100200033 ERR-3 ERR-4 ERR-5 4092100200034 PER-CENT PER-CENT PER-CENT 4092100200035 .2 .15 0.51 4092100200036 ENDCOMMON 3 0 4092100200037 DATA 5 39 4092100200038 EN EN-RSL-FW DATA ERR-S ERR-T 4092100200039 MEV KEV NO-DIM PER-CENT PER-CENT 4092100200040 4.24 190. .790 1.60 1.86 4092100200041 4.65 180. .794 0.90 1.22 4092100200042 4.97 130. .801 0.95 1.25 4092100200043 5.21 123. .780 1.00 1.30 4092100200044 5.43 120. .782 1.00 1.30 4092100200045 5.66 116. .825 0.32 0.81 4092100200046 5.90 108. .846 0.85 1.16 4092100200047 6.11 102. .849 1.03 1.30 4092100200048 6.32 97. .873 0.73 1.09 4092100200049 6.50 93. .860 0.70 1.03 4092100200050 6.68 89. .866 0.83 1.14 4092100200051 6.86 86. .914 0.79 1.09 4092100200052 7.02 83. .908 0.72 1.04 4092100200053 7.19 80. .926 1.05 1.29 4092100200054 7.34 78. .921 0.66 1.00 4092100200055 7.51 76. .923 0.95 1.21 4092100200056 7.66 74. .893 0.99 1.25 4092100200057 7.81 72. .892 1.06 1.29 4092100200058 7.96 70. .884 0.93 1.28 4092100200059 8.10 68. .893 0.87 1.20 4092100200060 8.25 67. .873 1.07 1.31 4092100200061 8.39 65. .871 0.74 1.05 4092100200062 8.52 64. .874 0.75 1.06 4092100200063 8.64 63. .875 0.73 1.05 4092100200064 8.78 62. .886 0.79 1.08 4092100200065 8.91 61. .874 0.78 1.11 4092100200066 9.03 60. .875 0.99 1.30 4092100200067 9.18 59. .880 0.75 1.05 4092100200068 9.33 58. .871 0.72 1.05 4092100200069 9.44 57. .887 0.76 1.10 4092100200070 9.56 56. .875 0.64 1.02 4092100200071 9.67 55. .872 0.72 1.07 4092100200072 9.82 54. .872 0.66 1.05 4092100200073 9.94 53. .897 1.07 1.46 4092100200074 10.06 53. .899 0.87 1.21 4092100200075 10.20 52. .893 1.05 1.32 4092100200076 10.44 51. .847 0.96 1.36 4092100200077 10.56 50. .861 0.82 1.45 4092100200078 10.69 50. .874 1.26 1.66 4092100200079 ENDDATA 41 0 4092100200080 ENDSUBENT 79 0 4092100299999 ENDENTRY 2 0 4092199999999