ENTRY 20189 20200925 22912018900000001 SUBENT 20189001 20200925 22912018900100001 BIB 14 34 2018900100002 TITLE The fission cross-section of U-235 from 0.01 eV to 2018900100003 0.1 eV and its absolute value at 0.0253 eV 2018900100004 INSTITUTE (2BLGMOL) 2018900100005 REFERENCE (J,JNE/AB,15,165,1961) 2018900100006 REL-REF (I,,A.J.Deruytter,J,NIM,7,145,1960) Fission chamber 2018900100007 and its efficiency. 2018900100008 AUTHOR (A.J.Deruytter) 2018900100009 FACILITY (CHOPS,2BLGMOL) BR1-reactor with slow chopper. 2018900100010 METHOD (TOF) 2 meter flight path, 25 channel time analyzer. 2018900100011 DETECTOR (FISCH) 4Pi ionization chamber for fission 2018900100012 2pi B-10 ionization chamber for neutron flux. 2018900100013 SAMPLE Foil (1.833 +- 0.010) mg of U-235 2018900100014 The isotopic composition of this film in percentage 2018900100015 of weight is: 2018900100016 U-235: (88.35 +- 0.02)% 2018900100017 U-234: (1.202 +- 0.005)% 2018900100018 U-236: (3.756 +- 0.007)% 2018900100019 U-238: (6.69 +- 0.02)% 2018900100020 The thickness of the U-235 layer was determined by 2018900100021 comparison with alpha-standards of the same isotopic 2018900100022 composition, and controlled by a mass-spectrometric 2018900100023 method. 2018900100024 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 2018900100025 = 97.7 +- 0.5 barns for 2200 meter/sec 2018900100026 neutrons. Calibration of B-10 ionization 2018900100027 chamber relative to Au-197(n,gamma). 2018900100028 PART-DET (FF) 2018900100029 ERR-ANALYS (DATA-ERR) Standard deviation, no other details 2018900100030 STATUS (TABLE) Taken from J.Nucl.En./AB,15(1961)165. 2018900100031 HISTORY (19721005C) 2018900100032 (20160907A) SD:Updated to new date formats,lower case. 2018900100033 Subent 002 split in two. Data was corrected in Sub.002 2018900100034 (20170423A) SD: Energy units in Subent 003 corrected. 2018900100035 (20200925U) SD: EN-NRM added. 2018900100036 ENDBIB 34 0 2018900100037 COMMON 3 3 2018900100038 EN-NRM MONIT MONIT-ERR 2018900100039 EV B B 2018900100040 0.0253 97.7 0.5 2018900100041 ENDCOMMON 3 0 2018900100042 ENDSUBENT 41 0 2018900199999 SUBENT 20189002 20160907 22522018900200001 BIB 3 4 2018900200002 REACTION (92-U-235(N,F),,SIG) 2018900200003 STATUS (TABLE) Tbl.4 from JNE/AB,15,165,1961 2018900200004 HISTORY (20160907A) SD: One value moved to Subent 003. Data 2018900200005 were corrected according to the Tbl.4 2018900200006 ENDBIB 4 0 2018900200007 NOCOMMON 0 0 2018900200008 DATA 3 25 2018900200009 EN DATA DATA-ERR 2018900200010 EV B B 2018900200011 0.01098 903.4 27.5 2018900200012 0.01165 898.4 24.0 2018900200013 0.01237 888.9 22.3 2018900200014 0.01347 855.8 20.4 2018900200015 0.01404 792.2 19.3 2018900200016 0.01502 784.8 19.1 2018900200017 0.01608 778.4 17.6 2018900200018 0.01728 742.3 15.8 2018900200019 0.01862 704.2 13.9 2018900200020 0.02010 659.7 12.0 2018900200021 0.02178 629.2 10.8 2018900200022 0.02367 622.9 10.3 2018900200023 0.02581 579.9 9.3 2018900200024 0.02829 545.0 8.4 2018900200025 0.03110 527.6 7.9 2018900200026 0.03437 483.5 7.2 2018900200027 0.03820 463.7 6.8 2018900200028 0.04267 426.7 6.1 2018900200029 0.04798 406.2 5.8 2018900200030 0.05441 375.6 5.3 2018900200031 0.06215 341.5 4.8 2018900200032 0.07173 308.6 4.5 2018900200033 0.08365 277.5 4.2 2018900200034 0.09884 253.1 4.2 2018900200035 0.11855 246.5 4.5 2018900200036 ENDDATA 27 0 2018900200037 ENDSUBENT 36 0 2018900299999 SUBENT 20189003 20170423 22612018900300001 BIB 3 8 2018900300002 REACTION (92-U-235(N,F),,SIG,,,DERIV) 2018900300003 2200 meter/sec value derived from fit to 2018900300004 25 values measured in the energy range of 2018900300005 0.011 to 0.119 eV. 2018900300006 STATUS (TABLE) From the text on p.173 of JNE/AB,15,165,1961 2018900300007 (DEP,20189002) Point-wise cross sections 2018900300008 HISTORY (20160907T) SD 2018900300009 (20170423A) SD: Energy units: MEV -> EV. 2018900300010 ENDBIB 8 0 2018900300011 NOCOMMON 0 0 2018900300012 DATA 3 1 2018900300013 EN DATA DATA-ERR 2018900300014 EV B B 2018900300015 0.0253 587. 6. 2018900300016 ENDDATA 3 0 2018900300017 ENDSUBENT 16 0 2018900399999 ENDENTRY 3 0 2018999999999