ENTRY 41503 20230131 4150300000001 SUBENT 41503001 20230131 20231011 4150300100001 BIB 12 67 4150300100002 TITLE Cross section for the subthreshold fission of 236U 4150300100003 AUTHOR (A.A.Alekseev, A.A.Bergman, A.I.Berlev, E.A.Koptelov, 4150300100004 B.F.Samylin, A.M.Trufanov, B.I.Fursov, V.S.Shorin) 4150300100005 INSTITUTE (4RUSJIA) A.Alekseev, A.Bergman, A.Berlev, E.Koptelov 4150300100006 (4RUSFEI) B.Samylin, A.Trufanov, B.Fursov, V.Shorin 4150300100007 REFERENCE (J,PAN,71,1351,2008) Engl. translation of J,YF,71 4150300100008 #doi:10.1134/S1063778808080048 4150300100009 (J,YF,71,1379,2008) Issue 8 4150300100010 (P,JIA-1182,200705) Graphs. Preprint of Institute of 4150300100011 Nuclear Research. 4150300100012 (R,INDC(CCP)-0451,200912) 4150300100013 METHOD (SLODT) 4150300100014 FACILITY (LINAC,4RUSJIA) 4150300100015 Spectrometer LSD-100. 4150300100016 Total lead mass 100 ton, lead purity 99.996%. 4150300100017 In form of prism of 3.3 m length,1.62m width, 1.79m 4150300100018 height. Four measurement channels of 65 and 80 mm 4150300100019 diameters. 4150300100020 INC-SOURCE (SPALL) Proton beam of 209 MeV energy,50 Hz frequency, 4150300100021 8-10 mA current,1 microsec current pule time on 4150300100022 lead target. 4150300100023 DETECTOR (FISCH) Fast ionization fission chambers with layers of4150300100024 U-236, U-235, U-238, Pu-239. 4150300100025 Fission chamber consists of 2 sections,each of two flat4150300100026 cylindrical fission chambers. Fissionable layers 4150300100027 diameter 18 mm. Filled with mixture of Ar + 10% CO2 at 4150300100028 pressure 1.5 atm. 4150300100029 Energy calibration was made by neutron resonances of 4150300100030 fission cross-sections for U-235 and Pu-239. 4150300100031 U-238-fission chamber was used for monitoring of proton4150300100032 pulse shape during measurement. 4150300100033 SAMPLE U-236 layer of 1.30 mg uranium mass as uranium oxide 4150300100034 U3O8, of high purity: U-236 - 99.845 +- 0.005 %, 4150300100035 U-235 - 0.047 +- 0.002 %, U-238 - 0.107 +- 0.002 %, 4150300100036 U-234 - 0.001%. 4150300100037 Layers of U-235 (1.07 mg mass) and Pu-239 (0.55mg mass,4150300100038 as oxide PuO2) used for neutron beam monitoring. 4150300100039 Layer of U-238 ( U-238 - 99.999 %, U-234 - 3 ppm, 4150300100040 U-235 - 3 ppm, U-236 - 3 ppm, mass 1.60 mg, as oxide 4150300100041 U3O8) used for SVZ-100 threshold determination at low 4150300100042 values of fission cross-sections. 4150300100043 COMMENT Of author V.Shorin. 4150300100044 Data presented on Fig.12 of Preprint JIA-1182,2007, 4150300100045 Fig.4 of J.Yad.Fiz.,v.71,p.1379,2008 - 4150300100046 92-U-238(N,F),,SIG,,SDT . 4150300100047 These data are preliminary and were not sent because 4150300100048 of their too big errors. 4150300100049 STATUS (APRVD) Approved by author V.Shorin . 4150300100050 HISTORY (20080120C) M.M. 4150300100051 (20080905U) M.M. Three misprints were corrected in 4150300100052 according to author's comment. 4150300100053 STATUS line was added in Subent 001. 4150300100054 2nd and 3-rd references were added. 4150300100055 Data of Subent 003 were changed into new ones, sent by 4150300100056 author V.Shorin 16.09.2008 . 4150300100057 (20090728A) R -> P in first reference . M.M. 4150300100058 (20100112A) Ref. R,INDC(CCP)-0451,2009 was inserted . 4150300100059 BIB information was added. 4150300100060 (20111230A) Subents 004,005 ASSUM1 reaction was 4150300100061 corrected. 4150300100062 (20130218U) Ref. J,YF,71,(8),1379,2008 was moved to 4150300100063 be first one. 4150300100064 (20190325U) Subent 002 was corrected 4150300100065 (20191221A) Subent 003 was corrected. 4150300100066 Minor correction of free text. 4150300100067 (20230131A) Subent 002 was deleted - see comment of 4150300100068 author. 4150300100069 ENDBIB 67 0 4150300100070 NOCOMMON 0 0 4150300100071 ENDSUBENT 70 0 4150300199999 NOSUBENT 41503002 20230131 20231011 4150300200001 SUBENT 41503003 20191221 41854150300300001 BIB 8 16 4150300300002 REACTION (92-U-236(N,F),,SIG,,SDT) 4150300300003 REL-REF (A,13642001,W.E.Parker+,J,PR/C,49,(4),672,1994) 4150300300004 (D,20501001,J.P.Theobald+,J,NP/A,181,639,1972) 4150300300005 MONITOR (92-U-235(N,F),,SIG) 4150300300006 Cross section from ENDF/B-VII was averaged over 4150300300007 spectrometer resolution function (deltaE/E=0.424). 4150300300008 MONIT-REF (,,3,ENDF/B-VII.0,,2006) 4150300300009 CORRECTION For background. 4150300300010 ERR-ANALYS (ERR-S) Statistical error. 4150300300011 (ERR-1) Uncertainty of normalization -6% . 4150300300012 STATUS (TABLE) Data received from V.S.Shorin. 4150300300013 Data are presented on Fig.16, 17, 18 of 4150300300014 Preprint JIA-1182,2007, 4150300300015 Fig. 6,7 of J.Yad.Fiz.,v.71,p.1379,2008. 4150300300016 Fig.4 of Rep.INDC(CCP)-0451,2009, page 14. 4150300300017 HISTORY (20191221A) SPA -> SDT in reaction. 4150300300018 ENDBIB 16 0 4150300300019 COMMON 1 3 4150300300020 ERR-1 4150300300021 PER-CENT 4150300300022 6.0 4150300300023 ENDCOMMON 3 0 4150300300024 DATA 3 125 4150300300025 EN DATA ERR-S 4150300300026 EV MB MB 4150300300027 18700. 0.612 0.085 4150300300028 13300. 0.648 0.096 4150300300029 10000. 0.611 0.11 4150300300030 7780. 0.347 0.11 4150300300031 6220. 0.416 0.12 4150300300032 5100. 0.550 0.13 4150300300033 4290. 0.506 0.15 4150300300034 3670. 0.558 0.16 4150300300035 3180. 0.752 0.18 4150300300036 2790. 1.77 0.21 4150300300037 2470. 1.45 0.22 4150300300038 2200. 1.18 0.22 4150300300039 1980. 0.94 0.23 4150300300040 1780. 1.46 0.25 4150300300041 1620. 1.66 0.27 4150300300042 1475. 3.99 0.34 4150300300043 1350. 7.83 0.42 4150300300044 1240. 9.83 0.48 4150300300045 1150. 8.58 0.47 4150300300046 1065. 9.29 0.50 4150300300047 986. 3.68 0.40 4150300300048 914. 1.65 0.36 4150300300049 850. -0.14 0.32 4150300300050 793. 0.58 0.36 4150300300051 741. 0.20 0.37 4150300300052 695. -0.37 0.37 4150300300053 652. 0.13 0.41 4150300300054 614. -0.24 0.42 4150300300055 579. -0.87 0.42 4150300300056 547. -0.29 0.45 4150300300057 518. -0.46 0.46 4150300300058 491. -0.66 0.47 4150300300059 466. -0.28 0.49 4150300300060 443. -0.33 0.50 4150300300061 422. 0.91 0.54 4150300300062 402. -0.042 0.51 4150300300063 383. 1.53 0.56 4150300300064 365. -0.72 0.50 4150300300065 349. -0.19 0.53 4150300300066 333. -0.51 0.54 4150300300067 319. 0.86 0.60 4150300300068 299. -0.25 0.60 4150300300069 275. -0.90 0.63 4150300300070 254. -0.37 0.70 4150300300071 235. 0.15 0.75 4150300300072 218. 0.87 0.79 4150300300073 203. -0.034 0.77 4150300300074 190. -0.018 0.78 4150300300075 177. 0.34 0.79 4150300300076 166. 0.35 0.80 4150300300077 156. -0.029 0.81 4150300300078 147. -0.97 0.80 4150300300079 137. 0.052 0.86 4150300300080 126. -0.26 0.89 4150300300081 116. -0.004 0.93 4150300300082 107. 1.06 0.98 4150300300083 99.4 -0.21 0.95 4150300300084 92.5 -0.46 0.98 4150300300085 86.3 -1.17 1.00 4150300300086 80.7 -0.52 1.10 4150300300087 75.6 -1.07 1.10 4150300300088 71.0 -0.99 1.20 4150300300089 66.8 -0.85 1.30 4150300300090 63.0 -1.28 1.30 4150300300091 59.5 -0.19 1.50 4150300300092 56.2 -0.38 1.55 4150300300093 53.3 3.02 1.75 4150300300094 49.7 0.85 1.80 4150300300095 45.7 1.64 1.90 4150300300096 42.1 -0.81 1.80 4150300300097 39.0 0.64 1.90 4150300300098 36.1 -1.11 1.90 4150300300099 33.6 -0.22 2.00 4150300300100 31.4 0.49 2.10 4150300300101 29.4 -1.99 2.00 4150300300102 27.5 -3.44 1.90 4150300300103 25.8 0.031 2.00 4150300300104 24.3 -1.59 2.10 4150300300105 22.7 -1.31 2.20 4150300300106 20.9 -1.57 2.40 4150300300107 19.4 1.03 2.60 4150300300108 18.0 1.99 2.70 4150300300109 16.8 -0.01 2.50 4150300300110 15.7 -0.75 2.43 4150300300111 14.7 -0.79 2.40 4150300300112 13.7 -0.36 2.50 4150300300113 12.9 0.11 2.70 4150300300114 12.2 -0.29 2.80 4150300300115 11.3 0.16 3.10 4150300300116 10.4 -0.69 3.25 4150300300117 9.66 -0.25 3.50 4150300300118 8.97 2.90 3.90 4150300300119 8.34 2.63 4.00 4150300300120 7.78 3.16 3.90 4150300300121 7.28 5.61 3.70 4150300300122 6.82 10.9 3.50 4150300300123 6.40 14.2 3.50 4150300300124 6.03 20.0 3.70 4150300300125 5.68 27.9 4.10 4150300300126 5.36 31.3 4.30 4150300300127 5.07 30.8 4.30 4150300300128 4.80 26.7 4.10 4150300300129 4.55 21.0 3.80 4150300300130 4.33 14.7 3.40 4150300300131 4.11 7.22 3.00 4150300300132 3.92 2.63 2.70 4150300300133 3.73 2.16 2.80 4150300300134 3.56 0.39 2.80 4150300300135 3.40 -0.44 2.90 4150300300136 3.19 1.26 3.20 4150300300137 2.92 0.68 3.20 4150300300138 2.69 -1.42 2.80 4150300300139 2.49 1.06 2.90 4150300300140 2.31 0.93 2.80 4150300300141 2.15 2.15 3.00 4150300300142 2.00 -0.10 2.90 4150300300143 1.89 0.64 3.20 4150300300144 1.75 1.79 3.60 4150300300145 1.65 -1.16 3.60 4150300300146 1.55 -0.19 4.20 4150300300147 1.44 2.75 5.10 4150300300148 1.33 -3.12 5.30 4150300300149 1.23 -0.88 6.40 4150300300150 1.14 -2.16 7.10 4150300300151 1.05 -1.53 7.70 4150300300152 ENDDATA 127 0 4150300300153 ENDSUBENT 152 0 4150300399999 SUBENT 41503004 20191221 41854150300400001 BIB 7 18 4150300400002 REACTION 1(92-U-236(N,F),,WID) 4150300400003 2(92-U-236(N,F),,ARE) 4150300400004 REL-REF (A,13642001,W.E.Parker+,J,PR/C,49,(4),672,1994) 4150300400005 (D,20501001,J.P.Theobald+,J,NP/A,181,639,1972) 4150300400006 (R,,,3,ENDF/B-VII.0,,2006) Assumed data from ENDF/B-7.04150300400007 were used data analysis. 4150300400008 ANALYSIS (AREA) 4150300400009 ERR-ANALYS (DATA-ERR) Errors are not specified. 4150300400010 ASSUMED (ASSUM1,92-U-236(N,EL),,WID) 4150300400011 (ASSUM2,92-U-236(N,G),,WID) 4150300400012 (ASSUM3,92-U-236(N,F),,SIG,,RES) Total peak cross sect.4150300400013 Used in data analysis. 4150300400014 STATUS (TABLE) Table 4 of Preprint JIA-1182,2007. 4150300400015 Table 1 of J.Yad.Fiz.,v.71,p.1379,2008. 4150300400016 Table 1 of Rep.INDC(CCP)-0451,2009, page 10. 4150300400017 HISTORY (20080905A) M.M. Correction in DATA block headings: 4150300400018 DATA 1 -> EN-RES, DATA 2 -> DATA 1, DATA 3 ->DATA 2, 4150300400019 and respective errors headings. 4150300400020 ENDBIB 18 0 4150300400021 COMMON 3 3 4150300400022 ASSUM1 ASSUM2 ASSUM3 4150300400023 MILLI-EV MILLI-EV B 4150300400024 2.24 24.5 39870. 4150300400025 ENDCOMMON 3 0 4150300400026 DATA 5 1 4150300400027 EN-RES DATA 1DATA-ERR 1DATA 2DATA-ERR 2 4150300400028 EV MICRO-EV MICRO-EV MB*EV MB*EV 4150300400029 5.45 1.05 0.1 66. 6. 4150300400030 ENDDATA 3 0 4150300400031 ENDSUBENT 30 0 4150300499999 SUBENT 41503005 20191221 41854150300500001 BIB 8 17 4150300500002 REACTION 1(92-U-236(N,F),,ARE) 4150300500003 2(92-U-236(N,F),,WID) 4150300500004 ANALYSIS (AREA) 4150300500005 ASSUMED (ASSUM1,92-U-236(N,EL),,WID) 4150300500006 (ASSUM2,92-U-236(N,G),,WID,,AV) 4150300500007 Used in data analysis for DATA 3 calculation. 4150300500008 REL-REF (R,,,3,ENDF/B-VII.0,,2006) Assumed data from ENDF/B-7 4150300500009 was used in data analysis. 4150300500010 ERR-ANALYS (DATA-ERR) Errors are not specified. 4150300500011 COMMENT Of authors.The resolution of LSD-100 spectrometer makes4150300500012 possible to detect only resonances at 1.28 and 2.96 keV4150300500013 STATUS (TABLE) Text of Preprint JIA-1182,2007, page 11; 4150300500014 J.Yad.Fiz.,v.71,p.1379,2008, page 1386, 4150300500015 J.Phys.At.Nucl.,v.71,p.1351,2008 p.1358. 4150300500016 HISTORY (20080905A) M.M. Correction in DATA block headings: 4150300500017 DATA 1 -> EN-RES, DATA 2 -> DATA 1, DATA 3 ->DATA 2, 4150300500018 and respective errors headings. 4150300500019 ENDBIB 17 0 4150300500020 COMMON 4 3 4150300500021 ASSUM1 ASSUM1-ERR ASSUM2 ASSUM2-ERR 4150300500022 MILLI-EV MILLI-EV MILLI-EV MILLI-EV 4150300500023 70.5 8.2 19.83 0.44 4150300500024 ENDCOMMON 3 0 4150300500025 DATA 5 1 4150300500026 EN-RES DATA 1DATA-ERR 1DATA 2DATA-ERR 2 4150300500027 KEV B*EV B*EV MILLI-EV MILLI-EV 4150300500028 1.28 4.9 0.6 2.0 0.32 4150300500029 ENDDATA 3 0 4150300500030 ENDSUBENT 29 0 4150300599999 SUBENT 41503006 20191221 41854150300600001 BIB 4 8 4150300600002 REACTION (92-U-238(N,F),,SIG,,RES) Average cross section in 4150300600003 resonance at 0.72 keV. 4150300600004 ERR-ANALYS (DATA-ERR) Errors are not specified. 4150300600005 STATUS (TABLE) Text of Preprint JIA-1182,2007, page 9, 4150300600006 J.Yad.Fiz.,v.71,p.1379,2008, page 1383, 4150300600007 J.Phys.At.Nucl.,v.71,p.1351,2008, page 1355. 4150300600008 (DEP,41503002) C-S . 4150300600009 HISTORY (20191221A) AV was deleted from reaction. 4150300600010 ENDBIB 8 0 4150300600011 NOCOMMON 0 0 4150300600012 DATA 3 1 4150300600013 EN-RES DATA DATA-ERR 4150300600014 KEV MB MB 4150300600015 0.72 1.78 0.24 4150300600016 ENDDATA 3 0 4150300600017 ENDSUBENT 16 0 4150300699999 ENDENTRY 6 0 4150399999999