ENTRY 10715 20081219 13521071500000001 SUBENT 10715001 20081219 13521071500100001 BIB 12 29 1071500100002 INSTITUTE (1USALRL) 1071500100003 REFERENCE (J,NSE,64,892,197712) 1071500100004 AUTHOR (J.B.Czirr,G.W.Carlson) 1071500100005 TITLE Precise Uranium-235 Fission Cross-Section Measurements 1071500100006 Below 1 keV. 1071500100007 FACILITY (LINAC,1USALRL) 100-MeV linear accelerator 1071500100008 METHOD (TOF) Time-of-flight. Two different stations. 1071500100009 DETECTOR (FISCH) Three different fission chambers 1071500100010 (GLASD) 6Li glass detectors for flux monitoring 1071500100011 ANALYSIS Data is weighted average of three measurements. 1071500100012 CORRECTION Corrections were made for deadtime,absorption of 1071500100013 neutrons by fission chamber and Li glass detector,and 1071500100014 multiple reactions in Li glass detector and fission 1071500100015 chamber. 1071500100016 ERR-ANALYS (ERR-S) Statistical errors 1071500100017 (ERR-SYS) Systematic errors from the following sources:1071500100018 .6Li(n,alpha) cross section relative shape 1071500100019 uncertainty (less than 0.1%), 1071500100020 .background error (0.2-1.4% depending on energy). 1071500100021 The following apply only to the region 0.02-0.10 eV: 1071500100022 .error in thermal neutron fission cross section (0.3%)1071500100023 .thermal normalization statistical error (0.12%), 1071500100024 .fission chamber self-shielding (0.15%), 1071500100025 .flux monitor efficiency enhancement due to neutron 1071500100026 scattering (0.10%). 1071500100027 STATUS (APRVD) Approved by G.W.Carlson, 1978/9/26. 1071500100028 (TABLE) Data taken from Table II in reference. 1071500100029 HISTORY (19780224C) 1071500100030 (20081219A) BIB section updated 1071500100031 ENDBIB 29 0 1071500100032 NOCOMMON 0 0 1071500100033 ENDSUBENT 32 0 1071500199999 SUBENT 10715002 20081219 13521071500200001 BIB 3 3 1071500200002 REACTION (92-U-235(N,F),,SIG,,AV) 1071500200003 MONITOR (92-U-235(N,F),,SIG) 1071500200004 HISTORY (20081219A) Data error headings updated. 1071500200005 ENDBIB 3 0 1071500200006 COMMON 2 3 1071500200007 EN-NRM MONIT 1071500200008 EV B 1071500200009 0.0253 585.4 1071500200010 ENDCOMMON 3 0 1071500200011 DATA 5 22 1071500200012 EN-MIN EN-MAX DATA ERR-S ERR-SYS 1071500200013 EV EV B PER-CENT PER-CENT 1071500200014 0.02 0.10 381.7 0.2 0.44 1071500200015 0.10 0.20 202.8 0.3 0.5 1071500200016 0.20 0.50 144.4 0.3 0.5 1071500200017 0.50 0.70 67.28 0.5 0.5 1071500200018 0.70 1.0 56.86 0.6 0.5 1071500200019 1.0 1.8 36.29 0.5 0.5 1071500200020 1.8 4.0 20.39 0.6 0.6 1071500200021 6.0 7.4 36.36 1.5 0.6 1071500200022 7.4 10.0 87.67 0.5 0.6 1071500200023 10.0 15.0 43.64 1.6 0.7 1071500200024 15.0 20.5 60.30 0.8 0.7 1071500200025 20.5 33.0 36.66 0.5 0.7 1071500200026 33.0 41.0 62.85 1.2 0.7 1071500200027 41.0 58.0 50.97 0.7 0.8 1071500200028 62.0 100. 24.15 0.6 0.9 1071500200029 100. 200. 20.23 0.6 1.0 1071500200030 200. 300. 19.93 0.7 1.1 1071500200031 300. 400. 12.22 1.0 1.2 1071500200032 400. 500. 12.71 1.1 1.3 1071500200033 500. 600. 14.43 1.1 1.3 1071500200034 600. 800. 10.52 1.7 1.4 1071500200035 800. 1000. 7.42 1.3 1.5 1071500200036 ENDDATA 24 0 1071500200037 ENDSUBENT 36 0 1071500299999 ENDENTRY 2 0 1071599999999