ENTRY 10842 20050706 13361084200000001 SUBENT 10842001 20050706 13361084200100001 BIB 13 53 1084200100002 INSTITUTE (1USAORL,1USAVBT) 1084200100003 REFERENCE (J,PR/C,19,335,1979) 1084200100004 AUTHOR (M.Mizumoto,S.Raman,R.L.Macklin,G.G.Slaughter, 1084200100005 J.A.Harvey,J.H.Hamilton) 1084200100006 TITLE Low energy neutron resonances in 206Pb 1084200100007 FACILITY (LINAC,1USAORL) Oak Ridge electron linear accelerator 1084200100008 SAMPLE For transmission measurement- 1084200100009 3.45-cm thick 206Pb, enriched to 88.38%. Compensator 1084200100010 sample consists of 0.173-cm thick natural Pb with 1084200100011 0.292-cm thick 207Pb enriched to 92.4%. 1084200100012 For capture measurement- 1084200100013 10.03-gms of 206Pb enriched to 88.38%, 2.50-cm by 1084200100014 4.77-cm. 1084200100015 METHOD (TOF) Time of flight. 1084200100016 For transmission measurements- 1084200100017 Flight path of 78.203 meters. 300-mg/sq-cm 10B filter 1084200100018 used to eliminate slow neutrons. Gamma flash 1084200100019 eliminated with 0.6-cm lead filter. Compensated 1084200100020 sample used to account for other isotope contributions1084200100021 and to act as thin sample for large neutron widths. 1084200100022 Effective sample thickness with compensator is 1084200100023 0.0989-atoms/barn with apparent enrichment of 99.9%. 1084200100024 Gamma background measured by eliminating neutrons 1084200100025 with thick polyethylene filter and correcting for 1084200100026 gamma attenuation in sample. 1084200100027 For capture measurements- 1084200100028 Flight path of 40.12 meters. 0.48-gms/sq-cm thick 10B 1084200100029 filter used to absorb low energy neutrons. 1084200100030 DETECTOR (SCIN) 11-cm diameter by 1.3-cm thick 6Li glass 1084200100031 detector for transmission measurement. 1084200100032 Pair of fluorocarbon-based liquid scintillators with 1084200100033 low neutron sensitivity and 15% efficiency for cascade1084200100034 gammas. Bias set above 197 keV to reject 19F inelastic1084200100035 gammas. 1084200100036 0.5-mm 6Li glass scintillator to monitor neutron flux 1084200100037 shape and intensity. 1084200100038 ANALYSIS (MLA) Multi-level Breit-Wigner analysis. Least squares 1084200100039 fitting with SIOB (transmission) and ORGLS2 (capture) 1084200100040 computer codes. Capture data normalized to saturated 1084200100041 4.9-eV gold resonance. 1084200100042 CORRECTION Transmission data corrected for time dependent (0.3 to 1084200100043 3.8%) and time-independent (0.5 to 1.3%) background. 1084200100044 Capture data corrected for background and dead time. 1084200100045 ERR-ANALYS Systematic error estimated to be 3%. 1084200100046 STATUS **** Capture cross section requires a correction by a 1084200100047 factor of 1.0360 due to error in processing code 1084200100048 (private communication, Macklin and Winters, 1084200100049 9/24/80). 1084200100050 HISTORY (19790402C) 1084200100051 (19801205A) Status comment added. 1084200100052 (19940517A) Illegal pointer deleted. Converted to lower1084200100053 (20050706C) DR Reference corrected and format updated 1084200100054 case. 1084200100055 ENDBIB 53 0 1084200100056 NOCOMMON 0 0 1084200100057 ENDSUBENT 56 0 1084200199999 SUBENT 10842002 19820812 13361084200200001 BIB 4 25 1084200200002 REACTION 1(82-PB-206(N,0),,EN) 1084200200003 2(82-PB-206(N,0),,L) 1084200200004 3(82-PB-206(N,0),,J) 1084200200005 4(82-PB-206(N,0),,PTY) 1084200200006 5(82-PB-206(N,EL),,WID,,G) 1084200200007 6(82-PB-206(N,G),,WID) 1084200200008 7(((82-PB-206(N,EL),,WID,,G)*(82-PB-206(N,G),,WID))/ 1084200200009 (82-PB-206(N,TOT),,WID)) 1084200200010 COMMENT 2Values obtained from resonance shapes. S-Wave possibil-1084200200011 ity excluded by abscence of interference for weighted 1084200200012 neutron widths on the order of 0.04*energy resolution.1084200200013 FLAG (1.) Based on transmission measurements of shape or 1084200200014 peak cross sections. 1084200200015 (2.)D-Wave possibility less than 1-percent based on 1084200200016 Bayes theorem. Values obtained from transmission 1084200200017 measurements of shape or peak cross sections. 1084200200018 (3.) Based on observation of strong gamma transitions 1084200200019 to known J=5/2 final states. S-Wave possibility ex- 1084200200020 cluded by these transitions. 1084200200021 (4.) Based on observation of strong gamma transitions 1084200200022 to known J=5/2 final states. S-Wave possibility ex- 1084200200023 cluded by these transitions. D-Wave possibility less 1084200200024 than 1-percent based on Bayes theorem. 1084200200025 HISTORY (19820812A) Corrected reaction. 1084200200026 (20050706C) Format updated 1084200200027 ENDBIB 25 0 1084200200028 COMMON 1 3 1084200200029 DATA-ERR 1 1084200200030 PER-CENT 1084200200031 0.08 1084200200032 ENDCOMMON 3 0 1084200200033 DATA 16 22 1084200200034 DATA 1DATA 2DATA 3DATA-MIN 3DATA-MAX 3DATA 41084200200035 DATA 5DATA-MAX 5DATA-ERR 5DATA 6DATA-MAX 6DATA-ERR 61084200200036 DATA 7DATA-ERR 7STAT-W G FLAG 1084200200037 KEV NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM 1084200200038 EV EV EV EV EV EV 1084200200039 EV EV NO-DIM NO-DIM 1084200200040 3.356 1. 1.5 -1. 1084200200041 0.46 0.06 0.087 0.006 1084200200042 0.126 0.004 2. 4. 1084200200043 10.860 1. 1.5 -1. 1084200200044 0.090 0.010 0.057 0.010 1084200200045 0.0503 0.0025 2. 3. 1084200200046 11.292 1084200200047 0.030 0.015 0.02 1084200200048 0.0453 0.0025 2. 1084200200049 14.213 1. 0.5 1.5 -1. 1084200200050 0.76 0.14 0.137 0.009 1084200200051 0.116 0.005 1. 2. 1084200200052 14.213 1. 0.5 1.5 -1. 1084200200053 0.76 0.14 0.068 0.005 1084200200054 0.116 0.005 2. 2. 1084200200055 16.420 0. 0.5 1. 1084200200056 0.64 0.12 0.6 1084200200057 0.641 0.022 1. 1. 1084200200058 19.734 1. 0.5 1.5 -1. 1084200200059 1.42 0.10 0.144 0.009 1084200200060 0.131 0.007 1. 2. 1084200200061 19.734 1. 0.5 1.5 -1. 1084200200062 1.42 0.10 0.072 0.005 1084200200063 0.131 0.007 2. 2. 1084200200064 19.793 1084200200065 0.14 0.04 0.04 0.06 1084200200066 0.137 0.007 2. 1084200200067 21.872 1. 1.5 -1. 1084200200068 0.70 0.10 0.181 0.018 1084200200069 0.238 0.010 2. 3. 1084200200070 25.103 1. 1.5 -1. 1084200200071 0.46 0.06 0.21 1084200200072 0.435 0.007 2. 3. 1084200200073 25.410 1. 0.5 -1. 1084200200074 56. 4. 0.332 0.018 1084200200075 0.330 0.018 1. 2. 1084200200076 32.182 0.07 1084200200077 0.02 1084200200078 0.052 0.007 2. 1084200200079 36.191 1. 0.5 -1. 1084200200080 38.8 0.6 0.284 0.030 1084200200081 0.282 0.030 1. 2. 1084200200082 37.435 1. 0.5 1.5 -1. 1084200200083 1.54 0.19 0.60 0.05 1084200200084 0.433 0.024 1. 1. 1084200200085 37.435 1. 0.5 1.5 -1. 1084200200086 1.54 0.19 0.30 0.03 1084200200087 0.433 0.024 2. 1084200200088 39.023 1084200200089 0.05 1084200200090 0.111 0.012 2. 1084200200091 40.654 1084200200092 0.5 0.3 0.17 0.04 1084200200093 0.125 0.015 1. 1084200200094 40.654 1084200200095 0.5 0.3 0.09 0.02 1084200200096 0.125 0.015 2. 1084200200097 42.070 1. 0.5 1.5 -1. 1084200200098 1.43 0.30 1.8 0.6 1084200200099 0.80 0.04 1. 1. 1084200200100 42.070 1. 0.5 1.5 -1. 1084200200101 1.43 0.30 0.9 0.3 1084200200102 0.80 0.04 2. 1. 1084200200103 47.473 1. 0.5 -1. 1084200200104 85.2 0.8 0.25 0.02 1084200200105 0.25 0.02 1. 2. 1084200200106 ENDDATA 72 0 1084200200107 ENDSUBENT 106 0 1084200299999 SUBENT 10842003 19790827 13361084200300001 BIB 2 2 1084200300002 REACTION (82-PB-206(N,EL),,STF) 1084200300003 HISTORY (19790827C) 1084200300004 ENDBIB 2 0 1084200300005 COMMON 1 3 1084200300006 MOMENTUM L 1084200300007 NO-DIM 1084200300008 1. 1084200300009 ENDCOMMON 3 0 1084200300010 DATA 4 3 1084200300011 EN-MIN EN-MAX DATA DATA-ERR 1084200300012 KEV KEV NO-DIM NO-DIM 1084200300013 2.5200E+01 1.7000E-05 9.0000E-06 1084200300014 2.5200E+01 4.7600E+01 1.6000E-04 9.0000E-05 1084200300015 4.7600E+01 3.2000E-05 1.3000E-05 1084200300016 ENDDATA 5 0 1084200300017 ENDSUBENT 16 0 1084200399999 SUBENT 10842004 19821119 13361084200400001 BIB 3 5 1084200400002 REACTION 1(82-PB-206(N,0),,EN) 1084200400003 2(82-PB-206(N,EL),,WID,,G) 1084200400004 3(82-PB-206(N,0),,L) 1084200400005 STATUS Data taken from figure 2 in article. 1084200400006 HISTORY (19821119C) 1084200400007 ENDBIB 5 0 1084200400008 NOCOMMON 0 0 1084200400009 DATA 3 16 1084200400010 DATA 1DATA 2DATA 3 1084200400011 KEV EV NO-DIM 1084200400012 53.9 13. 1084200400013 63.93 3. 1084200400014 65.97 0. 1084200400015 66.59 15. 1084200400016 70.28 12. 1084200400017 78.00 22. 1084200400018 80.36 14. 1084200400019 82.88 16. 1084200400020 86.10 10. 1084200400021 88.14 28. 1084200400022 90.09 130. 1084200400023 92.63 0. 1084200400024 101.18 33. 1084200400025 103.54 90. 1084200400026 111.15 46. 1084200400027 114.45 32. 1084200400028 ENDDATA 18 0 1084200400029 ENDSUBENT 28 0 1084200499999 ENDENTRY 4 0 1084299999999