ENTRY 12849 20221021 15041284900000001 SUBENT 12849001 20221021 15041284900100001 BIB 12 33 1284900100002 TITLE Measurement of the 232Th(n,f) subthreshold and 1284900100003 near-subthreshold cross section 1284900100004 AUTHOR (R.B.Perez, G.de Saussure, J.H.Todd, T.J.Yang, 1284900100005 G.F.Auchampaugh) 1284900100006 INSTITUTE (1USAORL,1USALAS) 1284900100007 (3CHFCHF) Institute of Nuclear Research, Taiwan 1284900100008 REFERENCE (J,PR/C,28,1635,1983) 1284900100009 FACILITY (LINAC,1USAORL) ORELA 1284900100010 INC-SOURCE (PHOTO) Photoneutrons from water-cooled Ta target 1284900100011 DETECTOR (FISCH) Fission-fragment detector consisted of 10 1284900100012 electronically independent sections. 1284900100013 SAMPLE Th (5831 mg in total) in the first and last four 1284900100014 sections; each section consisted of eight deposits 1284900100015 of ~1.2 mg/cm2. 1284900100016 235U (649 mg in total) in the two central sections; 1284900100017 each section consisted of four deposits of 1 mg/cm2. 1284900100018 METHOD (TOF) 24.874 m flight path length 1284900100019 ADD-RES Additional cross section averaged over energy intervals1284900100020 where averaged cross sections with thinner bins are 1284900100021 compiled in 002: 1284900100022 Energy interval Cross section 1284900100023 (keV) (ub) 1284900100024 1 - 20 1.4 +/- 2.8 1284900100025 20 - 100 2.3 +/- 2.0 1284900100026 0.1 - 100 2.0 +/- 1.4 1284900100027 STATUS (APRVD) R.B.Perez, 1984/10/15. 1284900100028 (TABLE) Table II-III of Phys.Rev.C28(1983)1635 1284900100029 Ratio and fission cross section data not available. 1284900100030 HISTORY (19840723C) 1284900100031 (19841018A) BIB update. 1284900100032 (20091105A) VM: Updated to new date formats,lower case.1284900100033 BIB updates 1284900100034 (20221021U) VT+On. Major revision in 002. 1284900100035 ENDBIB 33 0 1284900100036 NOCOMMON 0 0 1284900100037 ENDSUBENT 36 0 1284900199999 SUBENT 12849002 20221021 15041284900200001 BIB 7 22 1284900200002 REACTION (90-TH-232(N,F),,SIG,,AV) 1284900200003 MONITOR ((90-TH-232(N,F),,SIG,,AV)/(90-TH-232(N,F),,SIG,,AV)) 1284900200004 Measured shape ratio normalized to absolute ratio 1284900200005 MONIT-REF (,,3,ENDF/B-V,,1978) 1284900200006 En**(-0.81) shape assumed below 100 keV 1284900200007 CORRECTION Corrected for 1284900200008 - neutron scattering from structural material in detect1284900200009 - background which makes cross section negative in low 1284900200010 energy 1284900200011 ERR-ANALYS (ERR-SYS) Systematic uncertainty (5%) due to 1284900200012 - normalization 1284900200013 - background subtraction 1284900200014 - corrections for structural material neutron 1284900200015 scattering 1284900200016 (ERR-S) Statistical uncertainties based on two 1284900200017 standard deviations. 1284900200018 FLAG (1.) Two standard deviation in the article converted 1284900200019 to one standard deviation by the compiler. 1284900200020 HISTORY (20091105A) BIB update. Error headings updated, 1284900200021 statistical uncertainties for 2 tables combined. 1284900200022 (20221021A) VT+On. MONIT added. ERR-S divided by two 1284900200023 below 100 keV. 1284900200024 ENDBIB 22 0 1284900200025 COMMON 5 3 1284900200026 EN-RSL ERR-SYS EN-NRM-MIN EN-NRM-MAX MONIT 1284900200027 NSEC/M PER-CENT MEV MEV NO-DIM 1284900200028 0.4 5. 1.4 1.5 0.0519 1284900200029 ENDCOMMON 3 0 1284900200030 DATA 5 21 1284900200031 EN-MIN EN-MAX DATA ERR-S FLAG 1284900200032 KEV KEV MICRO-B MICRO-B NO-DIM 1284900200033 0.1 1. -8.0 0.0 1. 1284900200034 1. 5. 3.0 2.5 1. 1284900200035 5. 10. -2.0 2.5 1. 1284900200036 10. 20. 2.3 2.0 1. 1284900200037 20. 50. 2.4 1.2 1. 1284900200038 50. 100. 2.2 1.0 1. 1284900200039 100. 200. 3.6 0.6 1284900200040 200. 300. 2.4 0.5 1284900200041 300. 400. 5.4 0.6 1284900200042 400. 500. 5.8 0.6 1284900200043 500. 600. 5.9 0.7 1284900200044 600. 700. 11.3 1.0 1284900200045 700. 800. 75.6 2.9 1284900200046 800. 900. 249. 6. 1284900200047 900. 1000. 919. 16. 1284900200048 1000. 1100. 1.82E+03 0.03E+03 1284900200049 1100. 1200. 3.16E+03 0.06E+03 1284900200050 1200. 1300. 10.17E+03 0.18E+03 1284900200051 1300. 1400. 37.70E+03 0.72E+03 1284900200052 1400. 1500. 64.82E+03 1.29E+03 1284900200053 1500. 1600. 98.96E+03 2.20E+03 1284900200054 ENDDATA 23 0 1284900200055 ENDSUBENT 54 0 1284900299999 ENDENTRY 2 0 1284999999999