ENTRY 20968 20161001 22532096800000001 SUBENT 20968001 20161001 22532096800100001 BIB 12 54 2096800100002 INSTITUTE (2ZZZGEL) 2096800100003 (2BLGMOL) head authors address. 2096800100004 REFERENCE (J,NP/A,207,342,197306) 2096800100005 (C,72BUD,,56,197208) Preliminary results from capture 2096800100006 and scattering only. 2096800100007 AUTHOR (F.Poortmans, G.Rohr, J.P.Theobald, H.Weigmann, 2096800100008 G.J.Vanpraet) 2096800100009 TITLE Neutron resonance parameters of Pu-242 2096800100010 FACILITY (LINAC,2ZZZGEL) CBNM linear accelerator. 2096800100011 INC-SOURCE .Mercury cooled uranium target. 2096800100012 SAMPLE .4.49 g enriched Pu-242 oxide. Isotopic composition- 2096800100013 Pu-238 0.003%, Pu-239 0.018%, Pu-240 0.083%, 2096800100014 Pu-241 0.096%, Pu-242 99.8%, Pu-244 less than 0.0005% 2096800100015 .For scattering and capture experiments, diameter 2096800100016 83.1 mm, thickness 1.82E-4 atoms/b. 2096800100017 .For transmission experiments, sample diameter 14 mm, 2096800100018 thickness 6.08E-3 atoms/b. 2096800100019 METHOD (TOF) Time-of-flight used in capture, scattering 2096800100020 and transmission measurements. Flight path 2096800100021 of 30 m for scattering and transmission, and 2096800100022 60 m for capture experiments. 2096800100023 Background of scattering measured by black 2096800100024 resonance technique. 2096800100025 .Time of flight resolutions were- 2096800100026 scattering, delta-E(FWHM)/E = 2.0E-03, mainly due 2096800100027 to flight path variations caused by the size of 2096800100028 the sample, 2096800100029 capture and transmission, resolution = 1.5 nsec/m 2096800100030 to 5 nsec/m. 2096800100031 DETECTOR (SCIN) Six He-3 high pressure gaseous scintillators 2096800100032 (LND type 800) at 120 degrees from the sample 2096800100033 for the scattering measurement. 2096800100034 One such detector for the transmission 2096800100035 measurements. 2096800100036 (MOXR) Moxon-Rae detector for capture measurements, 2096800100037 in conjunction with- 2096800100038 (NAICR) NaI scintillator viewing a B-10 slab for flux 2096800100039 spectrum measurement. 1/V cross-section assumed2096800100040 for B-10(n,alpha) in energy range of interest. 2096800100041 Absolute calibration of (detector efficiency x 2096800100042 neutron flux) by observing capture in -black 2096800100043 resonances- between 5.2 and 70.9 eV from Ag. 2096800100044 CORRECTION .Scattering data corrected for self-screening and 2096800100045 absorption of scattered neutrons assuming that any 2096800100046 second interaction gives absorption. 2096800100047 STATUS .Some data from publication, some from NEUDADA. 2096800100048 HISTORY (19790613C) 2096800100049 (19800425A) Reaction string in Subent 007 corrected. 2096800100050 (19810403A) Subent 002 deleted (duplicate with Subent 2096800100051 005), REACTION strings changed and ERR-ANALYS 2096800100052 corrected. 2096800100053 (20161001A) SD:Updated to new date formats,lower case. 2096800100054 Small corrections in all Subents. Subent 002 deleted 2096800100055 (information presented in Subent 003). 2096800100056 ENDBIB 54 0 2096800100057 NOCOMMON 0 0 2096800100058 ENDSUBENT 57 0 2096800199999 NOSUBENT 20968002 20161001 22532096800200001 SUBENT 20968003 20161001 22532096800300001 BIB 6 16 2096800300002 REACTION 1(94-PU-242(N,0),,EN) 2096800300003 2(94-PU-242(N,G),,WID) 2096800300004 ANALYSIS (AREA ) Area analysis was applied to all three types 2096800300005 of measurement. See REL-REF. 2096800300006 Transmission area analysis by modified version 2096800300007 of Atta-Harvey program. 2096800300008 REL-REF (M,,F.H.Froehner+,J,NP,71,129,1965) - Capture area 2096800300009 analysis 2096800300010 (M,,W.Kolar,R,EUR-4760,1972) - Atta-Harvey program 2096800300011 ERR-ANALYS (DATA-ERR) Errors on neutron-width and gamma-width 2096800300012 determined so that scattering, capture and transmission2096800300013 results were all consistent. These errors are larger 2096800300014 than the purely mathematical results. 2096800300015 STATUS (TABLE) Table 1 from NP/A,207,342,1973 2096800300016 HISTORY (20161001U) SD: MEV -> EV in col. 1 of DATA section. 2096800300017 Table checked against presentation in the article. 2096800300018 ENDBIB 16 0 2096800300019 NOCOMMON 0 0 2096800300020 DATA 3 25 2096800300021 DATA 1DATA 2DATA-ERR 2 2096800300022 EV MILLI-EV MILLI-EV 2096800300023 53.46 21.2 1.7 2096800300024 67.57 23. 3. 2096800300025 107.27 21. 2. 2096800300026 131.3 24.5 7.0 2096800300027 149.6 21. 2. 2096800300028 204.7 20. 2. 2096800300029 273.5 22. 2. 2096800300030 298.6 26. 7. 2096800300031 303.5 22.5 2.0 2096800300032 319.9 22. 3. 2096800300033 332.4 25. 3. 2096800300034 382.2 22.5 2.0 2096800300035 482.3 23.5 2.0 2096800300036 536.2 21. 2. 2096800300037 548.3 25. 2. 2096800300038 594.7 21. 2. 2096800300039 692.9 22. 2. 2096800300040 711.3 19.5 2.0 2096800300041 754.8 21.5 2.5 2096800300042 837.5 20. 3. 2096800300043 856.1 22. 3. 2096800300044 877.6 26. 3. 2096800300045 886.2 29. 10. 2096800300046 922.5 18. 3. 2096800300047 949.1 26. 6. 2096800300048 ENDDATA 27 0 2096800300049 ENDSUBENT 48 0 2096800399999 SUBENT 20968004 20161001 22532096800400001 BIB 4 6 2096800400002 REACTION (94-PU-242(N,G),,WID,,AV) 2096800400003 STATUS (TABLE) Data from text on p.347 from NP/A,207,342,1973 2096800400004 (DEP,20968003) 2096800400005 ERR-ANALYS (ERR-S) Statistical error. 2096800400006 (ERR-SYS) Systematic error. 2096800400007 HISTORY (20161001U) SD: ERR-1 -> ERR-SYS. 2096800400008 ENDBIB 6 0 2096800400009 NOCOMMON 0 0 2096800400010 DATA 5 1 2096800400011 EN-RES-MIN EN-RES-MAX DATA ERR-S ERR-SYS 2096800400012 EV EV MILLI-EV MILLI-EV MILLI-EV 2096800400013 2.68 1000. 21.9 0.4 1. 2096800400014 ENDDATA 3 0 2096800400015 ENDSUBENT 14 0 2096800499999 SUBENT 20968005 20161001 22532096800500001 BIB 7 24 2096800500002 REACTION 1(94-PU-242(N,0),,EN) 2096800500003 2(94-PU-242(N,EL),,WID) 2096800500004 3(94-PU-242(N,EL),,WID/RED) 2096800500005 ANALYSIS (AREA) Area analysis was applied to all three types 2096800500006 of measurement (see REL-REF). 2096800500007 Transmission area analysis by modified version 2096800500008 of Atta-Harvey program, Kolar, EUR-4760E,1972. 2096800500009 Scattering measurements normalized to lead cross 2096800500010 section from L.A.Rayburn et al.,Nucl.Phys. 61(1965)381.2096800500011 REL-REF (M,,F.H.Froehner+,J,NP,71,129,1965) - Capture area 2096800500012 analysis 2096800500013 (M,,W.Kolar,R,EUR-4760,1972) - Atta-Harvey program 2096800500014 (R,11026030,L.A.Rayburn+,J,NP,61,381,1965) 2096800500015 ERR-ANALYS (DATA-ERR) Errors on neutron-width and gamma-width 2096800500016 determined so that scattering, capture and transmission2096800500017 results were all consistent. These errors are larger 2096800500018 than the purely mathematical results. 2096800500019 FLAG (1.) Weak resonances seen in only one of the three 2096800500020 experiments. 2096800500021 (2.) Probably double resonances. 2096800500022 STATUS (TABLE) Table 1 from NP/A,207,342,1973 2096800500023 HISTORY (20161001U) SD: MEV -> EV in col. 1 of DATA section. 2096800500024 Table checked against presentation in the article. 2096800500025 MONITOR, EN-NRM, MONIT, MONIT-ERR deleted. 2096800500026 ENDBIB 24 0 2096800500027 COMMON 1 3 2096800500028 MOMENTUM L 2096800500029 NO-DIM 2096800500030 0. 2096800500031 ENDCOMMON 3 0 2096800500032 DATA 6 72 2096800500033 DATA 1DATA 2DATA-ERR 2FLAG DATA 3DATA-ERR 32096800500034 EV MILLI-EV MILLI-EV NO-DIM MILLI-EV MILLI-EV 2096800500035 2.68 2.0 0.08 1.22 0.052096800500036 22.56 0.31 0.03 0.065 0.0062096800500037 40.93 0.47 0.04 0.073 0.0072096800500038 53.46 52.0 2.0 7.11 0.042096800500039 67.57 4.4 0.2 0.54 0.022096800500040 88.44 0.53 0.10 0.056 0.012096800500041 107.27 17.0 1.0 1.64 0.012096800500042 131.3 6.1 0.2 0.53 0.022096800500043 149.6 14.5 0.5 1.18 0.042096800500044 163.3 0.47 0.06 0.037 0.0052096800500045 204.7 52. 3. 3.6 0.22096800500046 209.7 0.45 0.10 0.031 0.0072096800500047 215.2 5.2 0.3 0.35 0.022096800500048 219.0 0.2 0.1 0.014 0.0072096800500049 232.6 5. 0.3 0.33 0.022096800500050 264.3 0.3 0.1 0.018 0.0062096800500051 273.5 16.6 0.5 1.00 0.032096800500052 298.6 8.7 0.3 0.50 0.022096800500053 303.5 17.8 0.8 1.02 0.052096800500054 319.9 200. 40. 11.2 2.22096800500055 327.6 0.5 0.3 1. 0.028 0.0172096800500056 332.4 70. 15. 3.84 0.822096800500057 374.2 6.0 0.3 0.31 0.022096800500058 382.2 54. 5. 2.76 0.262096800500059 396.1 2.5 1.0 1. 0.13 0.052096800500060 399.7 2. 1. 0.10 0.052096800500061 410.5 8.0 0.5 0.39 0.022096800500062 424. 5.0 0.4 0.24 0.022096800500063 474.6 0.4 0.2 1. 0.018 0.0092096800500064 482.3 23.6 0.6 1.07 0.272096800500065 503.9 150. 50. 2. 6.68 2.232096800500066 536.2 100. 5. 4.32 0.222096800500067 548.3 74. 3. 3.16 0.132096800500068 576.1 30. 5. 2. 1.25 0.212096800500069 594.7 38. 4. 1.56 0.162096800500070 599.5 11. 1. 0.45 0.042096800500071 610.7 14. 2. 0.57 0.082096800500072 638.2 5. 1. 0.20 0.042096800500073 669.2 14. 2. 0.54 0.082096800500074 692.9 45. 3. 1.71 0.112096800500075 711.3 130. 10. 4.87 0.372096800500076 727.4 3. 2. 0.11 0.072096800500077 736.6 100. 5. 3.68 0.182096800500078 754.8 137. 5. 4.99 0.182096800500079 761.7 3.3 1.5 0.12 0.052096800500080 788.5 53. 14. 1.89 0.502096800500081 793.5 85. 40. 3.02 1.422096800500082 823.8 2. 1. 0.07 0.042096800500083 837.5 38. 2. 1.31 0.072096800500084 856.1 37. 2. 1.26 0.072096800500085 865.1 10. 1. 0.34 0.032096800500086 877.6 62. 3. 2.09 0.102096800500087 886.2 22.0 1.5 0.74 0.052096800500088 922.5 64. 3. 2.11 0.102096800500089 935.4 11. 2. 0.36 0.072096800500090 939.6 10. 3. 1. 0.33 0.12096800500091 949.1 14.0 1.5 0.45 0.052096800500092 977.9 14.5 1.5 0.46 0.052096800500093 1004. 43. 3. 1.36 0.092096800500094 1030. 46.0 2.5 1.43 0.082096800500095 1045. 118. 10. 3.65 0.312096800500096 1062.5 33. 3. 1.00 0.092096800500097 1087.5 200. 10. 6.0 0.32096800500098 1117. 5. 3. 0.15 0.092096800500099 1129.5 10. 5. 0.3 0.152096800500100 1148. 300. 100. 9. 3.2096800500101 1182.5 13. 3. 0.4 0.092096800500102 1197. 95. 6. 2.75 0.172096800500103 1207. 40. 5. 1.15 0.142096800500104 1248. 9. 3. 0.25 0.082096800500105 1267. 27. 3. 0.76 0.082096800500106 1286. 59. 5. 1.65 0.142096800500107 ENDDATA 74 0 2096800500108 ENDSUBENT 107 0 2096800599999 SUBENT 20968006 20161001 22532096800600001 BIB 3 4 2096800600002 REACTION (94-PU-242(N,0),,D) 2096800600003 ANALYSIS From plot of observed number of levels versus 2096800600004 energy. 2096800600005 STATUS (TABLE) Data from text on p.349 from NP/A,207,342,1973 2096800600006 ENDBIB 4 0 2096800600007 NOCOMMON 0 0 2096800600008 DATA 3 1 2096800600009 EN-RES-MIN EN-RES-MAX DATA 2096800600010 EV EV EV 2096800600011 2.68 1000. 17.02 2096800600012 ENDDATA 3 0 2096800600013 ENDSUBENT 12 0 2096800699999 SUBENT 20968007 20161001 22532096800700001 BIB 5 6 2096800700002 REACTION (94-PU-242(N,EL),,STF) 2096800700003 ANALYSIS From plot of (sum of reduced widths) versus energy. 2096800700004 STATUS (TABLE) Data from text on p.349 from NP/A,207,342,1973 2096800700005 ERR-ANALYS (DATA-ERR) Errors define 68% confidence interval. 2096800700006 HISTORY (20161001U) SD: MOMENTUM L was added (s-wave strength 2096800700007 function). 2096800700008 ENDBIB 6 0 2096800700009 NOCOMMON 0 0 2096800700010 DATA 6 1 2096800700011 EN-RES-MIN EN-RES-MAX MOMENTUM L DATA -DATA-ERR +DATA-ERR 2096800700012 EV EV NO-DIM NO-DIM NO-DIM NO-DIM 2096800700013 2.68 1000. 0.0 8.9E-05 9.E-06 1.E-052096800700014 ENDDATA 3 0 2096800700015 ENDSUBENT 14 0 2096800799999 SUBENT 20968008 20161001 22532096800800001 BIB 3 4 2096800800002 REACTION (94-PU-242(N,EL),,WID/RED,,AV) 2096800800003 STATUS (TABLE) Data from text on p.347 from NP/A,207,342,1973 2096800800004 (DEP,20968005) 2096800800005 HISTORY (20161001A) SD: Value corrected (1000.4 -> 1004.eV). 2096800800006 ENDBIB 4 0 2096800800007 NOCOMMON 0 0 2096800800008 DATA 3 1 2096800800009 EN-RES-MIN EN-RES-MAX DATA 2096800800010 EV EV MILLI-EV 2096800800011 2.68 1004. 1.52 2096800800012 ENDDATA 3 0 2096800800013 ENDSUBENT 12 0 2096800899999 ENDENTRY 8 0 2096899999999