ENTRY 12849 20221021 150412849000 1 SUBENT 12849001 20221021 150412849001 1 BIB 12 33 12849001 2 TITLE Measurement of the 232Th(n,f) subthreshold and 12849001 3 near-subthreshold cross section 12849001 4 AUTHOR (R.B.Perez, G.de Saussure, J.H.Todd, T.J.Yang, 12849001 5 G.F.Auchampaugh) 12849001 6 INSTITUTE (1USAORL,1USALAS) 12849001 7 (3CHFCHF) Institute of Nuclear Research, Taiwan 12849001 8 REFERENCE (J,PR/C,28,1635,1983) 12849001 9 FACILITY (LINAC,1USAORL) ORELA 12849001 10 INC-SOURCE (PHOTO) Photoneutrons from water-cooled Ta target 12849001 11 DETECTOR (FISCH) Fission-fragment detector consisted of 10 12849001 12 electronically independent sections. 12849001 13 SAMPLE Th (5831 mg in total) in the first and last four 12849001 14 sections; each section consisted of eight deposits 12849001 15 of ~1.2 mg/cm2. 12849001 16 235U (649 mg in total) in the two central sections; 12849001 17 each section consisted of four deposits of 1 mg/cm2. 12849001 18 METHOD (TOF) 24.874 m flight path length 12849001 19 ADD-RES Additional cross section averaged over energy intervals12849001 20 where averaged cross sections with thinner bins are 12849001 21 compiled in 002: 12849001 22 Energy interval Cross section 12849001 23 (keV) (ub) 12849001 24 1 - 20 1.4 +/- 2.8 12849001 25 20 - 100 2.3 +/- 2.0 12849001 26 0.1 - 100 2.0 +/- 1.4 12849001 27 STATUS (APRVD) R.B.Perez, 1984/10/15. 12849001 28 (TABLE) Table II-III of Phys.Rev.C28(1983)1635 12849001 29 Ratio and fission cross section data not available. 12849001 30 HISTORY (19840723C) 12849001 31 (19841018A) BIB update. 12849001 32 (20091105A) VM: Updated to new date formats,lower case.12849001 33 BIB updates 12849001 34 (20221021U) VT+On. Major revision in 002. 12849001 35 ENDBIB 33 0 12849001 36 NOCOMMON 0 0 12849001 37 ENDSUBENT 36 0 1284900199999 SUBENT 12849002 20221021 150412849002 1 BIB 7 22 12849002 2 REACTION (90-TH-232(N,F),,SIG,,AV) 12849002 3 MONITOR ((90-TH-232(N,F),,SIG,,AV)/(90-TH-232(N,F),,SIG,,AV)) 12849002 4 Measured shape ratio normalized to absolute ratio 12849002 5 MONIT-REF (,,3,ENDF/B-V,,1978) 12849002 6 En**(-0.81) shape assumed below 100 keV 12849002 7 CORRECTION Corrected for 12849002 8 - neutron scattering from structural material in detect12849002 9 - background which makes cross section negative in low 12849002 10 energy 12849002 11 ERR-ANALYS (ERR-SYS) Systematic uncertainty (5%) due to 12849002 12 - normalization 12849002 13 - background subtraction 12849002 14 - corrections for structural material neutron 12849002 15 scattering 12849002 16 (ERR-S) Statistical uncertainties based on two 12849002 17 standard deviations. 12849002 18 FLAG (1.) Two standard deviation in the article converted 12849002 19 to one standard deviation by the compiler. 12849002 20 HISTORY (20091105A) BIB update. Error headings updated, 12849002 21 statistical uncertainties for 2 tables combined. 12849002 22 (20221021A) VT+On. MONIT added. ERR-S divided by two 12849002 23 below 100 keV. 12849002 24 ENDBIB 22 0 12849002 25 COMMON 5 3 12849002 26 EN-RSL ERR-SYS EN-NRM-MIN EN-NRM-MAX MONIT 12849002 27 NSEC/M PER-CENT MEV MEV NO-DIM 12849002 28 0.4 5. 1.4 1.5 0.0519 12849002 29 ENDCOMMON 3 0 12849002 30 DATA 5 21 12849002 31 EN-MIN EN-MAX DATA ERR-S FLAG 12849002 32 KEV KEV MICRO-B MICRO-B NO-DIM 12849002 33 0.1 1. -8.0 0.0 1. 12849002 34 1. 5. 3.0 2.5 1. 12849002 35 5. 10. -2.0 2.5 1. 12849002 36 10. 20. 2.3 2.0 1. 12849002 37 20. 50. 2.4 1.2 1. 12849002 38 50. 100. 2.2 1.0 1. 12849002 39 100. 200. 3.6 0.6 12849002 40 200. 300. 2.4 0.5 12849002 41 300. 400. 5.4 0.6 12849002 42 400. 500. 5.8 0.6 12849002 43 500. 600. 5.9 0.7 12849002 44 600. 700. 11.3 1.0 12849002 45 700. 800. 75.6 2.9 12849002 46 800. 900. 249. 6. 12849002 47 900. 1000. 919. 16. 12849002 48 1000. 1100. 1.82E+03 0.03E+03 12849002 49 1100. 1200. 3.16E+03 0.06E+03 12849002 50 1200. 1300. 10.17E+03 0.18E+03 12849002 51 1300. 1400. 37.70E+03 0.72E+03 12849002 52 1400. 1500. 64.82E+03 1.29E+03 12849002 53 1500. 1600. 98.96E+03 2.20E+03 12849002 54 ENDDATA 23 0 12849002 55 ENDSUBENT 54 0 1284900299999 ENDENTRY 2 0 1284999999999