ENTRY 40888 20180303 41784088800000001 SUBENT 40888001 20180303 41784088800100001 BIB 14 48 4088800100002 TITLE Measurement of the ratio of the 232Th and 235U fission4088800100003 cross sections in a neutron energy range 5-10 MeV 4088800100004 AUTHOR (A.A.Goverdovskii,A.K.Gordyushin,B.D.Kuz'minov, 4088800100005 V.F.Mitrofanov,A.I.Sergachev,S.M.Solov'ev, 4088800100006 T.E.Kuz'mina) 4088800100007 INSTITUTE (4RUSFEI) 4088800100008 REFERENCE (J,AE,61,380,1986) 4088800100009 (J,SJA,61,958,1986) Engl.transl.of J,AE,61,380,1986 4088800100010 MONITOR ((90-TH-232(N,F),,SIG)/(92-U-235(N,F),,SIG)) 4088800100011 at energies 6.10, 6.93, 7.32, 7.72 MeV. 4088800100012 FACILITY (VDG,4RUSFEI) Electrostatic charge exchange accelerator4088800100013 DETECTOR (IOCH) Fast double ionization chamber 4088800100014 Methane-filled To Pressure 1.5E+5 Pa 4088800100015 Detection efficiency 99.2+-0.7 % . 4088800100016 INC-SOURCE (D-D) 4088800100017 STATUS (APRVD) Sergachev 1985-12-27 4088800100018 METHOD (TOF) 4088800100019 SAMPLE For energetic dependence measurements of the CS-ratio 4088800100020 two samples were used. First - U-235 content is 99.9924088800100021 percent, 2-nd - TH-232 content is 100 % . 4088800100022 For absolute normalization of CS-ratio two samples 4088800100023 were used: 3-d - U-235 content is 0.36 % , Th-232 4088800100024 content is 99.64 % . 4-th - U-235 content is 5.48 % , 4088800100025 TH-232 content is 94.52 % . 4088800100026 CORRECTION Neutron background from lab.hall scattering is 3.+- 4088800100027 0.2 % , that of expt. arraignment - 0.8 % in the 4088800100028 energy range 6.8 - 8 MeV . Correction from fis.frag. 4088800100029 deceleration is 1.5 % in the fiss.thres. region 4088800100030 ERR-ANALYS (ERR-1,0.9,2.5) Statistical error from counting rates 4088800100031 of ratio in the time registration channel 4088800100032 (ERR-2,0.3,0.7,U) Statistical error of detection 4088800100033 efficiencies ratio. 4088800100034 (ERR-3) Systematic error due to CS-ratio energy 4088800100035 dependence normalization 4088800100036 (ERR-4) Error due to the U-235-to-Th-232 contents 4088800100037 ratio determination 4088800100038 (ERR-5,0.1,0.2) Error caused by the corrections 4088800100039 (ERR-6,0.1,1.4) Error due to background . 4088800100040 (ERR-S) Statistical error 4088800100041 (ERR-T) Total error 4088800100042 HISTORY (19870104C) Compiled at CJD 4088800100043 (19920708U) Use of flagged data lines explained in 4088800100044 more details 4088800100045 (20180303A) M.M. upper -> lower case correction. 4088800100046 Dates were corrected for 4-digits year. 4088800100047 Ref. SJA,61,958,1986 was added. 4088800100048 BIB information was added. 4088800100049 ERR-ANALYS was corrected for now-day rules. 4088800100050 ENDBIB 48 0 4088800100051 COMMON 2 3 4088800100052 ERR-3 ERR-4 4088800100053 PER-CENT PER-CENT 4088800100054 .8 1.5 4088800100055 ENDCOMMON 3 0 4088800100056 ENDSUBENT 55 0 4088800199999 SUBENT 40888002 20180303 41784088800200001 BIB 4 9 4088800200002 REACTION ((90-TH-232(N,F),,SIG)/(92-U-235(N,F),,SIG)) 4088800200003 FLAG (1.) Energies for which cs-ratio was measured for 4088800200004 sample number four (Th-232 content 94.52 % , 4088800200005 U-325 content 5.48 % , thickness 260 milligram/ 4088800200006 cm2). Those energies serve for normalization of 4088800200007 cross-section ratio 4088800200008 STATUS (TABLE) Table 1 of SJA,61,958,1986 4088800200009 HISTORY (19920708U) Explanation given under 'FLAG' revised . 4088800200010 'RATIO' in data section changed to 'DATA' 4088800200011 ENDBIB 9 0 4088800200012 NOCOMMON 0 0 4088800200013 DATA 6 33 4088800200014 EN EN-RSL DATA ERR-S ERR-T FLAG 4088800200015 MEV MEV NO-DIM PER-CENT PER-CENT NO-DIM 4088800200016 4.92 .16 .127 2.6 3.0 4088800200017 5.16 .16 .140 2.2 2.8 4088800200018 5.39 .15 .145 2.0 2.7 4088800200019 5.60 .14 .149 2.2 2.8 4088800200020 5.85 .14 .142 3.5 3.8 4088800200021 6.10 .13 .143 1.6 2.7 1. 4088800200022 6.34 .12 .176 1.5 2.3 4088800200023 6.53 .11 .211 1.5 2.3 4088800200024 6.76 .11 .256 0.9 2.0 4088800200025 6.93 .10 .258 0.9 2.0 1. 4088800200026 7.16 .10 .255 0.9 2.0 4088800200027 7.32 .10 .241 0.9 1.9 1. 4088800200028 7.55 .10 .236 1.0 2.0 4088800200029 7.72 .09 .234 1.3 2.2 1. 4088800200030 7.88 .09 .226 1.4 2.3 4088800200031 8.04 .09 .218 1.4 2.3 4088800200032 8.20 .09 .210 1.2 2.2 4088800200033 8.37 .08 .202 1.6 2.3 4088800200034 8.53 .08 .204 1.3 2.4 4088800200035 8.68 .08 .198 1.2 2.3 4088800200036 8.84 .08 .193 1.6 2.5 4088800200037 9.00 .07 .191 2.0 2.7 4088800200038 9.16 .07 .195 1.5 2.4 4088800200039 9.31 .07 .194 1.5 2.4 4088800200040 9.47 .07 .195 1.5 2.5 4088800200041 9.57 .07 .195 1.5 2.5 4088800200042 9.72 .07 .194 1.2 2.4 4088800200043 9.83 .07 .191 1.5 2.5 4088800200044 9.93 .07 .180 1.4 2.5 4088800200045 10.03 .06 .184 1.1 2.4 4088800200046 10.19 .06 .178 1.2 2.5 4088800200047 10.30 .06 .187 2.0 3.0 4088800200048 10.40 .06 .175 1.2 2.6 4088800200049 ENDDATA 35 0 4088800200050 ENDSUBENT 49 0 4088800299999 ENDENTRY 2 0 4088899999999