ENTRY 40836 20180303 41784083600000001 SUBENT 40836001 20180303 41784083600100001 BIB 10 17 4083600100002 TITLE Measurement of the ratio of the 236U and 235U fission 4083600100003 cross section in the neutron-energy range 0.34-7.4 MeV4083600100004 AUTHOR (B.I.Fursov,M.P.Klemyshev,B.F.Samylin, 4083600100005 G.N.Smirenkin,Yu.M.Turchin) 4083600100006 INSTITUTE (4RUSFEI) 4083600100007 REFERENCE (J,AE,59,284,1985) Issue 4 . Data table is given 4083600100008 (J,SJA,59,846,1985) Engl.transl.of J,AE,59,284,1985 4083600100009 MONITOR (92-U-235(N,F),,SIG) 4083600100010 FACILITY (VDG,4RUSFEI) 4083600100011 INC-SOURCE (P-T,D-D) 4083600100012 DETECTOR (IOCH) Double ionization chamber 4083600100013 STATUS (APRVD) Fursov, 1987-02 , 2005-10 4083600100014 HISTORY (19870618C) Compiled at CJD 4083600100015 (20051007A) (M.M.) Sub.003 data was corrected. 4083600100016 Dates were corrected. 4083600100017 (20180303U) M.M. Upper -> lower case correction. 4083600100018 Ref. SJA,59,846,1985 was added. 4083600100019 ENDBIB 17 0 4083600100020 NOCOMMON 0 0 4083600100021 ENDSUBENT 20 0 4083600199999 SUBENT 40836002 20180303 41784083600200001 BIB 5 46 4083600200002 REACTION 1((92-U-236(N,F),,SIG)/(92-U-235(N,F),,SIG)) Sample one 4083600200003 2((92-U-236(N,F),,SIG)/(92-U-235(N,F),,SIG)) Sample two 4083600200004 SAMPLE 1 Sample one is composed out of two uranil-uranate 4083600200005 layers 0.3-0.5 milligram/cm2 thickness on aluminum 4083600200006 backing. U-235 layer contains .001 % U-234, 99.9955+- 4083600200007 .001 % U-235, .0035 % U-236, .0005 % U-238 /// 4083600200008 U-236 Layer contains 3.002+-.009 % U-235, 96.87+- 4083600200009 .10 % of U-236, .13+-.02 % of U-238 4083600200010 2 Sample two is composed out of two uranil-uranate 4083600200011 layers 0.3-0.5 milligram/cm2 thickness on aluminum 4083600200012 backing. U-235 layer is the same as in sample one, 4083600200013 namely it contains .001 % of U-234, 99.9955 % of 4083600200014 U-235, .0035 % of U-236, .0005 % of U-238 /// 4083600200015 . U-236 layer contains 4.973+-.015 % of U-235, 94.90 4083600200016 +-.09 % of U-236, .13+-.02 % of U-238 4083600200017 ERR-ANALYS (ERR-T) Total error. All errors given below refer to 4083600200018 sample one at neutron energy 2.5 MeV : 4083600200019 (ERR-S) Statistical error 4083600200020 (ERR-1) Error due to fission of the admixture 4083600200021 isotopes by fast neutrons 4083600200022 (ERR-2) error caused by the energy dependence of 4083600200023 fragments registration efficiency 4083600200024 (ERR-3) Neutron background error caused by target 4083600200025 structure scattering 4083600200026 (ERR-4) Error caused by neutron background from 4083600200027 associated (p,n) reactions 4083600200028 (ERR-5) Error caused by the experimental hall 4083600200029 neutron background 4083600200030 (ERR-6) Error caused by neutron inelastic scattering 4083600200031 (ERR-7) Error of the energy dependence or cross- 4083600200032 section ratio 4083600200033 (ERR-8) Error of the relative concentrations of U-235 4083600200034 and U-236 nuclei in sample one 4083600200035 (ERR-9) Error of the measurements at low neutron 4083600200036 energies 4083600200037 (ERR-10) Error due to the neutron flux difference 4083600200038 in layers of U-235 and U-236 4083600200039 CORRECTION Corrections were made for measurements on sample one 4083600200040 at 2.5 MeV. On the energy dependence of fragments 4083600200041 registration efficiency - 0.7 % , on neutron back- 4083600200042 ground caused by target structure scattering 1.6 % , 4083600200043 on neutron background from (p,n) reaction - 1.9 % , 4083600200044 on experimental hall neutron background - 0.4 % , 4083600200045 on neutron flux difference in layers U-235 and U-236 4083600200046 - 1.1 % . 4083600200047 STATUS (TABLE) Table 2 of SJA,59,846,1985 4083600200048 ENDBIB 46 0 4083600200049 COMMON 12 6 4083600200050 ERR-T ERR-S ERR-1 ERR-2 ERR-3 ERR-4 4083600200051 ERR-5 ERR-6 ERR-7 ERR-8 ERR-9 ERR-10 4083600200052 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 4083600200053 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 4083600200054 1.6 .5 .1 .3 .7 .2 4083600200055 .3 .5 1.1 .3 1.0 .5 4083600200056 ENDCOMMON 6 0 4083600200057 DATA 5 4 4083600200058 EN DATA 1ERR-T 1DATA 2ERR-T 2 4083600200059 MEV NO-DIM NO-DIM NO-DIM NO-DIM 4083600200060 1.475 .538 .009 .542 .008 4083600200061 2. .633 .009 .631 .008 4083600200062 2.5 .687 .011 .688 .010 4083600200063 3. .713 .012 .718 .011 4083600200064 ENDDATA 6 0 4083600200065 ENDSUBENT 64 0 4083600299999 SUBENT 40836003 20180303 41784083600300001 BIB 5 13 4083600300002 REACTION ((92-U-236(N,F),,SIG)/(92-U-235(N,F),,SIG)) 4083600300003 SAMPLE Sample is composed out of two uranil-uranate layers 4083600300004 0.3 - 0.5 milligram/cm2 thickness on aluminum backing4083600300005 U-235 layer contains .001 % of U-234, 99.9955+-.001 4083600300006 % of U-235, .0035 % of U-236, .0005 % of U-238 /// 4083600300007 U-236 layer contains U-234 - less than .001 % , 4083600300008 U-235 - .047+-.002 % , U-236 - 99.845+-.005 % , U-238 4083600300009 - .107+-.002 % 4083600300010 ERR-ANALYS (ERR-S) Statiatical error 4083600300011 (ERR-T) Total error. 4083600300012 STATUS (TABLE) Table 3 of SJA,59,846,1985 4083600300013 HISTORY (20051007A) (M.M.) Data values and ERR-S for En=.683 4083600300014 and .732 were corrected. 4083600300015 ENDBIB 13 0 4083600300016 NOCOMMON 0 0 4083600300017 DATA 5 66 4083600300018 EN EN-RSL DATA ERR-S ERR-T 4083600300019 MEV KEV NO-DIM PER-CENT PER-CENT 4083600300020 .338 40. .00209 4.8 5.2 4083600300021 .387 38. .00274 4.6 5.0 4083600300022 .436 36. .00400 3.7 4.2 4083600300023 .484 34. .00574 2.9 3.5 4083600300024 .535 33. .00823 2.6 3.2 4083600300025 .584 33. .0112 2.5 3.1 4083600300026 .633 32. .0163 2.1 2.8 4083600300027 .683 32. .0274 2.0 2.7 4083600300028 .732 32. .0539 1.8 2.5 4083600300029 .782 31. .0991 1.5 2.3 4083600300030 .832 31. .141 1.2 2.1 4083600300031 .882 31. .194 .8 1.9 4083600300032 .931 30. .263 .6 1.8 4083600300033 .981 32. .283 .5 1.7 4083600300034 1.030 32. .289 .9 2.5 4083600300035 1.079 32. .327 .6 1.8 4083600300036 1.129 32. .401 .8 1.8 4083600300037 1.178 33. .448 .5 1.7 4083600300038 1.227 33. .494 .3 1.6 4083600300039 1.276 33. .547 .4 1.6 4083600300040 1.326 33. .559 .4 1.7 4083600300041 1.376 34. .560 .3 1.6 4083600300042 1.426 34. .557 .3 1.6 4083600300043 1.475 34. .542 .3 1.6 4083600300044 1.524 34. .524 .4 1.6 4083600300045 1.574 35. .534 .3 1.6 4083600300046 1.624 35. .558 .4 1.6 4083600300047 1.674 35. .582 .3 1.6 4083600300048 1.800 73. .604 .2 1.6 4083600300049 1.900 72. .615 .2 1.6 4083600300050 2.00 71. .636 .2 1.5 4083600300051 2.10 70. .651 .3 1.5 4083600300052 2.20 69. .663 .3 1.5 4083600300053 2.30 68. .682 .2 1.5 4083600300054 2.40 68. .691 .3 1.5 4083600300055 2.50 67. .685 .4 1.6 4083600300056 2.60 66. .685 .3 1.6 4083600300057 2.70 66. .689 .4 1.6 4083600300058 2.80 65. .695 .3 1.5 4083600300059 2.90 65. .699 .3 1.5 4083600300060 3.00 65. .712 .2 1.6 4083600300061 3.10 65. .719 .2 1.6 4083600300062 3.20 65. .727 .2 1.6 4083600300063 3.30 65. .739 .3 1.6 4083600300064 3.40 66. .746 .3 1.6 4083600300065 3.50 66. .750 .4 1.7 4083600300066 3.60 66. .758 .4 1.8 4083600300067 3.80 240. .773 .7 2.0 4083600300068 4.00 174. .774 .3 1.9 4083600300069 4.20 161. .779 .4 1.9 4083600300070 4.40 142. .784 .4 1.8 4083600300071 4.60 133. .787 .4 1.8 4083600300072 4.80 118. .788 .5 1.8 4083600300073 5.00 112. .785 .4 1.7 4083600300074 5.20 106. .791 .5 1.6 4083600300075 5.40 104. .796 .4 1.6 4083600300076 5.60 102. .803 .7 1.8 4083600300077 5.80 125. .805 1.0 2.0 4083600300078 6.00 122. .812 1.1 2.1 4083600300079 6.20 120. .811 1.1 2.2 4083600300080 6.40 117. .831 1.2 2.4 4083600300081 6.60 116. .855 1.0 2.3 4083600300082 6.80 116. .880 0.9 2.4 4083600300083 7.00 117. .888 0.8 2.4 4083600300084 7.20 118. .893 1.0 2.5 4083600300085 7.40 119. .867 1.3 2.7 4083600300086 ENDDATA 68 0 4083600300087 ENDSUBENT 86 0 4083600399999 ENDENTRY 3 0 4083699999999