ENTRY 10766 20140609 14021076600000001 SUBENT 10766001 20140609 14021076600100001 BIB 17 49 1076600100002 TITLE Neutron Capture Cross Section of Plutonium-240 1076600100003 AUTHOR (L.W.Weston,J.H.Todd) 1076600100004 REFERENCE (J,NSE,63,143,1977) 1076600100005 REL-REF (R,10301001,L.W.Weston+,J,ANS,15,480,1972) Related 1076600100006 measurements of 239Pu and 241Pu. 1076600100007 INSTITUTE (1USAORL) 1076600100008 FACILITY (LINAC,1USAORL) ORELA. 1076600100009 INC-SOURCE (PHOTO) 1076600100010 SAMPLE PuO2 samples of 2 and 9 g. Isotopic composition - 1076600100011 239Pu (0.76%), 240Pu (98.3%), 241Pu (0.761%), 242Pu 1076600100012 (0.171%). Thickness was 0.000108 and 0.000487 atom/b, 1076600100013 respectively. 1076600100014 PART-DET (N,G) 1076600100015 DETECTOR (SCIN,IOCH) NE226 liquid scintillators for gamma- 1076600100016 rays. NE213 liquid scintillators for neutrons. Flux 1076600100017 monitored with a parallel- plate 10BF3 ionization 1076600100018 chamber which was calibrated against a 6Li glass 1076600100019 detector. 1076600100020 METHOD (TOF,PSD) 20- and 85-m flight paths. The data taken 1076600100021 at the flight path 85 m were normalized to those 1076600100022 taken at 20 m over the neutron energy range from 10 1076600100023 to 20 keV. 1076600100024 MONITOR (94-PU-240(N,G)94-PU-241,,SIG) Normalized between 1076600100025 0.02 and 0.03 eV to ENDF/B-IV data. An additional 1076600100026 check on the normalization was made by the saturated 1076600100027 resonance technique on the 1.06-eV resonance. 1076600100028 MONIT-REF (,,3,ENDF/B-IV,,1974) 1076600100029 ERR-ANALYS Errors given are systematic uncertainties. 1076600100030 Components of the estimated uncertainties in various 1076600100031 neutron energy intervals, Table III, page 148: 1076600100032 Type of Uncertainty Uncertainty (%) 1076600100033 Energy Interval (keV) 0.2-1 1-10 10-80 80-300 1076600100034 (ERR-1) Background det. 6 6 6 6 1076600100035 (ERR-2) Flux shape meas. 1.5 3 4 10 1076600100036 (ERR-3) 10B & 6Li cs 1 2 2.5 3.5 1076600100037 (ERR-4) Detector effic. 2 2 3 4 1076600100038 (ERR-5) Sample thick.cor. 2 1 0.5 0.5 1076600100039 (ERR-SYS) Total 6.9 7.3 8.2 12.8 1076600100040 CORRECTION Corrections were made for resonance self-protection 1076600100041 and for neutron scattering by neutron resonances. For 1076600100042 resonances above 200 eV, these corrections were small 1076600100043 (<5% up to 15 keV, and <1% at higher energies) 1076600100044 because the samples were thin. 1076600100045 STATUS (APRVD) Approved by L.Weston, 1979/1/30. 1076600100046 HISTORY (19781129C) VM. 1076600100047 (20100402A) VM: Updated to new date formats,lower case.1076600100048 BIB updated. 1076600100049 (20140609A) BP: Updated the information, linked related1076600100050 publications. 1076600100051 ENDBIB 49 0 1076600100052 COMMON 2 3 1076600100053 EN-NRM-MIN EN-NRM-MAX 1076600100054 EV EV 1076600100055 0.02 0.03 1076600100056 ENDCOMMON 3 0 1076600100057 ENDSUBENT 56 0 1076600199999 SUBENT 10766002 20140609 14021076600200001 BIB 2 2 1076600200002 REACTION (94-PU-240(N,G)94-PU-241,,SIG,,AV) 1076600200003 STATUS (TABLE) Table I, page 147. 1076600200004 ENDBIB 2 0 1076600200005 NOCOMMON 0 0 1076600200006 DATA 9 33 1076600200007 EN-MIN EN-MAX DATA ERR-SYS ERR-1 ERR-2 1076600200008 ERR-3 ERR-4 ERR-5 1076600200009 KEV KEV B PER-CENT PER-CENT PER-CENT 1076600200010 PER-CENT PER-CENT PER-CENT 1076600200011 0.20 0.30 8.71 6.9 6. 1.5 1076600200012 1. 2. 2. 1076600200013 0.30 0.40 10.27 6.9 6. 1.5 1076600200014 1. 2. 2. 1076600200015 0.40 0.50 6.60 6.9 6. 1.5 1076600200016 1. 2. 2. 1076600200017 0.50 0.60 7.14 6.9 6. 1.5 1076600200018 1. 2. 2. 1076600200019 0.60 0.70 5.09 6.9 6. 1.5 1076600200020 1. 2. 2. 1076600200021 0.70 0.80 2.63 6.9 6. 1.5 1076600200022 1. 2. 2. 1076600200023 0.80 0.90 6.63 6.9 6. 1.5 1076600200024 1. 2. 2. 1076600200025 0.90 1.00 5.53 6.9 6. 1.5 1076600200026 1. 2. 2. 1076600200027 1.00 1.50 3.50 7.3 6. 3. 1076600200028 2. 2. 1. 1076600200029 1.50 2.00 3.03 7.3 6. 3. 1076600200030 2. 2. 1. 1076600200031 2.00 3.00 2.42 7.3 6. 3. 1076600200032 2. 2. 1. 1076600200033 3.00 4.00 1.89 7.3 6. 3. 1076600200034 2. 2. 1. 1076600200035 4.00 5.00 1.67 7.3 6. 3. 1076600200036 2. 2. 1. 1076600200037 5.00 6.00 1.55 7.3 6. 3. 1076600200038 2. 2. 1. 1076600200039 6.00 7.00 1.38 7.3 6. 3. 1076600200040 2. 2. 1. 1076600200041 7.00 8.00 1.36 7.3 6. 3. 1076600200042 2. 2. 1. 1076600200043 8.00 9.00 1.32 7.3 6. 3. 1076600200044 2. 2. 1. 1076600200045 9.00 10.0 1.28 7.3 6. 3. 1076600200046 2. 2. 1. 1076600200047 10.0 15.0 1.06 8.2 6. 4. 1076600200048 2.5 3. 0.5 1076600200049 15.0 20.0 0.935 8.2 6. 4. 1076600200050 2.5 3. 0.5 1076600200051 20.0 30.0 0.790 8.2 6. 4. 1076600200052 2.5 3. 0.5 1076600200053 30.0 40.0 0.691 8.2 6. 4. 1076600200054 2.5 3. 0.5 1076600200055 40.0 50.0 0.592 8.2 6. 4. 1076600200056 2.5 3. 0.5 1076600200057 50.0 60.0 0.583 8.2 6. 4. 1076600200058 2.5 3. 0.5 1076600200059 60.0 70.0 0.468 8.2 6. 4. 1076600200060 2.5 3. 0.5 1076600200061 70.0 80.0 0.420 8.2 6. 4. 1076600200062 2.5 3. 0.5 1076600200063 80.0 90.0 0.382 12.8 6. 10. 1076600200064 3.5 4. 0.5 1076600200065 90.0 100. 0.346 12.8 6. 10. 1076600200066 3.5 4. 0.5 1076600200067 100. 150. 0.317 12.8 6. 10. 1076600200068 3.5 4. 0.5 1076600200069 150. 200. 0.271 12.8 6. 10. 1076600200070 3.5 4. 0.5 1076600200071 200. 250. 0.223 12.8 6. 10. 1076600200072 3.5 4. 0.5 1076600200073 250. 300. 0.180 12.8 6. 10. 1076600200074 3.5 4. 0.5 1076600200075 300. 350. 0.160 20. 1076600200076 1076600200077 ENDDATA 70 0 1076600200078 ENDSUBENT 77 0 1076600299999 ENDENTRY 2 0 1076699999999