ENTRY 21575 20200806 22942157500000001 SUBENT 21575001 20200806 22942157500100001 BIB 14 45 2157500100002 TITLE Total neutron cross section measurements on Fe-54, 2157500100003 Fe-56,Fe-57 2157500100004 AUTHOR (E.M.R.Cornelis,C.R.Jungmann,L.Mewissen,F.Poortmans) 2157500100005 REFERENCE (C,79KNOX,,159,1979) 2157500100006 INSTITUTE (2ZZZGEL) Experimental site, C.R.Jungmann. 2157500100007 (2BLGMOL) L.Mewissen, F.Poortmans. 2157500100008 (2BLGBLG) R.U.C.A. (University of Antwerp) E.Cornelis. 2157500100009 FACILITY (LINAC,2ZZZGEL) 150 MeV linac of the CBMN, operated 2157500100010 at 800 Hz, 4 ns burst width. 2157500100011 INC-SOURCE (PHOTO) 2157500100012 SAMPLE Fe(2)-O(3) canned in Al tubes with windows of 0.3 mm 2157500100013 thick, diam=35 mm. Thicknesses and enrichments 2157500100014 are : 54-Fe - 97.68%, 6.98e-02 Fe atoms/b 2157500100015 56-Fe - 99.93%, 7.81e-02 Fe atoms/b 2157500100016 57-Fe - 91.69%, 5.11e-02 Fe atoms/b. 2157500100017 METHOD (TOF) Time-of-flight method, transmission 2157500100018 measurement with sample at 100 m and detector at 2157500100019 197.85 m. 2157500100020 (PHD) Pulse-height discrimination. Time-of-flight 2157500100021 events are only stored if the pulse-height is within 2157500100022 a required window. 2157500100023 DETECTOR (SCIN) Plastic scintillator NE-110, 6*6*1 inch, 2157500100024 viewed side on by 4 pm type RCA4516 (diam=0.75 in) 2157500100025 ANALYSIS R-matrix formalism is used to analyze the resonances. 2157500100026 The FANAL-code modified to include single level 2157500100027 Breit-Wigner formula for (l greater than 0)-resonances2157500100028 is used. 2157500100029 (MLA) Multi-level Breit-Wigner analysis is also 2157500100030 done, using the SIOB-code. The results of the two 2157500100031 methods were in good agreement. 2157500100032 REL-REF (M,,F.H.Froehner,R,KFK-2129,1976) - FANAL-code 2157500100033 (M,,S.de Saussure+,R,ORNL-TM-6286,1978) - SIOB-code 2157500100034 CORRECTION Background and dead time. Corrections are done with 2157500100035 the computer-code ANGELA. Background amounts to 2157500100036 0.5% at 1 MeV, 0.3% at 500 keV, 3% at 100 keV, 2157500100037 and 16% at 40 keV. 2157500100038 COMMENT Results for p-waves are not valid. The analysis 2157500100039 was done with the restriction for the S-wave 2157500100040 resonance contribution ((E-E0)/wid)**2 to be less 2157500100041 than 20. Later measurements with better resolution 2157500100042 have shown that this is not correct. 2157500100043 HISTORY (19800623C) G.C. 2157500100044 (20200806U) SD:Updated to new date formats,lower case. 2157500100045 Corrections in all Subents. Ref. BAP,24 deleted (info 2157500100046 presented in the 79KNOX,,159). 2157500100047 ENDBIB 45 0 2157500100048 NOCOMMON 0 0 2157500100049 ENDSUBENT 48 0 2157500199999 SUBENT 21575002 20200806 22942157500200001 BIB 5 6 2157500200002 REACTION 1(26-FE-54(N,0),,EN) 2157500200003 2(26-FE-54(N,TOT),,WID) 2157500200004 ANALYSIS Results obtained from R-matrix formalism analysis. 2157500200005 ERR-ANALYS (DATA-ERR) No information about source of uncertainty 2157500200006 STATUS (TABLE) Tbl.1 from 79KNOX,159. 2157500200007 HISTORY (20200806U) SD: STATUS updated. ANALYSIS added. 2157500200008 ENDBIB 6 0 2157500200009 COMMON 1 3 2157500200010 MOMENTUM L 2157500200011 NO-DIM 2157500200012 0.0000E+00 2157500200013 ENDCOMMON 3 0 2157500200014 DATA 4 11 2157500200015 DATA 1DATA-ERR 1DATA 2DATA-ERR 2 2157500200016 KEV KEV KEV KEV 2157500200017 52.654 0.007 1.978 0.001 2157500200018 71.805 0.005 1.676 0.001 2157500200019 98.664 0.004 0.511 0.005 2157500200020 130.080 0.008 3.47 0.01 2157500200021 147.330 0.009 3.78 0.015 2157500200022 174.030 0.009 4.59 0.03 2157500200023 188.580 0.041 38.17 0.1 2157500200024 223.390 0.004 1.08 0.08 2157500200025 244.110 0.016 19.48 0.07 2157500200026 257.070 0.005 0.37 0.01 2157500200027 291.852 0.006 0.89 0.01 2157500200028 ENDDATA 13 0 2157500200029 ENDSUBENT 28 0 2157500299999 SUBENT 21575003 20200806 22942157500300001 BIB 4 5 2157500300002 REACTION (26-FE-54(N,EL),,STF) 2157500300003 ANALYSIS Results obtained from R-matrix formalism analysis. 2157500300004 (11 Resonances). 2157500300005 STATUS (TABLE) Text on p.162 of 79KNOX,159. 2157500300006 HISTORY (20200806U) SD: STATUS updated. ANALYSIS added. 2157500300007 ENDBIB 5 0 2157500300008 NOCOMMON 0 0 2157500300009 DATA 4 1 2157500300010 MOMENTUM L EN-RES-MIN EN-RES-MAX DATA 2157500300011 NO-DIM KEV KEV NO-DIM 2157500300012 0.0 5.20E+01 2.92E+02 7.50E-04 2157500300013 ENDDATA 3 0 2157500300014 ENDSUBENT 13 0 2157500399999 SUBENT 21575004 20200806 22942157500400001 BIB 5 8 2157500400002 REACTION 1(26-FE-56(N,0),,EN) 2157500400003 2(26-FE-56(N,TOT),,WID) 2157500400004 ANALYSIS Results obtained from R-matrix formalism analysis. 2157500400005 ERR-ANALYS (DATA-ERR) No information about source of uncertainty 2157500400006 STATUS (TABLE) Tbl.2 from 79KNOX,159. 2157500400007 HISTORY (20200806A) SD: 0.020 -> 0.002 keV in col.DATA-ERR (1) 2157500400008 (at En=73.934 keV) according to the tbl. 2157500400009 STATUS updated. ANALYSIS added. 2157500400010 ENDBIB 8 0 2157500400011 COMMON 1 3 2157500400012 MOMENTUM L 2157500400013 NO-DIM 2157500400014 0.0000E+00 2157500400015 ENDCOMMON 3 0 2157500400016 DATA 4 9 2157500400017 DATA 1DATA-ERR 1DATA 2DATA-ERR 2 2157500400018 KEV KEV KEV KEV 2157500400019 73.934 0.002 0.588 0.004 2157500400020 83.513 0.005 1.210 0.010 2157500400021 129.720 0.002 0.576 0.004 2157500400022 140.270 0.005 2.610 0.010 2157500400023 169.060 0.003 0.950 0.007 2157500400024 187.540 0.006 3.525 0.015 2157500400025 220.350 0.004 1.230 0.010 2157500400026 244.710 0.004 0.450 0.005 2157500400027 276.790 0.011 3.630 0.020 2157500400028 ENDDATA 11 0 2157500400029 ENDSUBENT 28 0 2157500499999 SUBENT 21575005 20200806 22942157500500001 BIB 4 5 2157500500002 REACTION (26-FE-56(N,EL),,STF) 2157500500003 ANALYSIS Results obtained from R-matrix formalism analysis. 2157500500004 ( 9 resonances). 2157500500005 STATUS (TABLE) Text on p.162 of 79KNOX,159. 2157500500006 HISTORY (20200806U) SD: STATUS updated. ANALYSIS added. 2157500500007 ENDBIB 5 0 2157500500008 NOCOMMON 0 0 2157500500009 DATA 4 1 2157500500010 MOMENTUM L EN-RES-MIN EN-RES-MAX DATA 2157500500011 NO-DIM KEV KEV NO-DIM 2157500500012 0.0 7.30E+01 2.770E+02 1.90E-04 2157500500013 ENDDATA 3 0 2157500500014 ENDSUBENT 13 0 2157500599999 ENDENTRY 5 0 2157599999999