ENTRY 10899 20200229 14641089900000001 SUBENT 10899001 20200229 14641089900100001 BIB 14 40 1089900100002 INSTITUTE (1USALAS) 1089900100003 REFERENCE (R,LA-7855,1979) 1089900100004 AUTHOR (D.M.Drake,M.Drosg,P.Lisowski,L.Veeser) 1089900100005 TITLE Neutron scattering cross sections for Pu-242 1089900100006 FACILITY (VDG,1USALAS) Vertical van de Graaff 1089900100007 INC-SOURCE (P-LI7) Protons on lithium-7 for 0.57 and 1.0 MeV 1089900100008 neutrons 1089900100009 (P-T) Protons on tritium for 1.5-MeV neutrons. 1089900100010 SAMPLE Six cylinders 6.4-mm diameter and 15-mm long in contact1089900100011 with inner surface of a 19-mm diameter aluminum can. 1089900100012 Total mass of plutonium is 47.25-gms. 1089900100013 DETECTOR (SCIN) NE-213 liquid scintillator shielded with 1089900100014 tungsten and lithium-loaded paraffin. Detector uses 1089900100015 large polyethylene shadow bar. 1089900100016 Small liquid scintillator placed 5-meters from target 1089900100017 used as flux monitor. Two methods used to determine 1089900100018 cross sections. 1089900100019 MONITOR (1-H-1(N,EL)1-H-1,,DA) Hydrogen cross sections used 1089900100020 to determine plutonium cross section. 1089900100021 METHOD (TOF) Time of flight. Sample can rotated at 1-rpm to 1089900100022 eliminate angular dependence of sample configuration. 1089900100023 Empty can used to measure correction for neutrons 1089900100024 scattered from aluminum. Pulse shape discriminator 1089900100025 used to reject gamma pulses in detector. Flux monitor 1089900100026 used to normalize measurements to target current. 1089900100027 CORRECTION Data corrected for neutrons scattered from aluminum 1089900100028 sample can, neutron attenuation in sample, multiple 1089900100029 scattering, and the natural radioactivity of the 1089900100030 sample 1089900100031 ERR-ANALYS (ERR-S) Quoted errors are statistical only. 1089900100032 (ERR-SYS,11.,13.) Systematic errors 1089900100033 are due to uncertainties in normalization, efficiency,1089900100034 multiple scattering, and attenuation estimates. 1089900100035 Systematic errors approximately 11% (0.57-MeV), 1089900100036 13% (1.0-MeV), and 12% (1.5-MeV). 1089900100037 STATUS (TABLE) Table I, LA-7855-MS 1089900100038 (APRVD) Approved by D.M.Drake, 80/5/9. 1089900100039 HISTORY (19800317C) 1089900100040 (20200204U) OS. ERR-ANALYS, STATUS updated, converted 1089900100041 to lower case, minor BIB changes 1089900100042 ENDBIB 40 0 1089900100043 NOCOMMON 0 0 1089900100044 ENDSUBENT 43 0 1089900199999 SUBENT 10899002 20200229 14641089900200001 BIB 2 5 1089900200002 REACTION (94-PU-242(N,EL)94-PU-242,,DA) 1089900200003 FLAG (1.) Isotopic contribution from inelastic scattering 1089900200004 assumed to be 46-mb/sr. Could not be experimentally 1089900200005 resolved. Subtracted from measurement to get quoted 1089900200006 values 1089900200007 ENDBIB 5 0 1089900200008 NOCOMMON 0 0 1089900200009 DATA 5 30 1089900200010 EN ANG DATA ERR-S FLAG 1089900200011 MEV ADEG MB/SR MB/SR NO-DIM 1089900200012 0.57 20. 1615. 80. 1089900200013 0.57 25. 1423. 75. 1089900200014 0.57 30. 1318. 65. 1089900200015 0.57 40. 1003. 50. 1089900200016 0.57 55. 673. 34. 1089900200017 0.57 70. 422. 21. 1089900200018 0.57 90. 284. 16. 1089900200019 0.57 110. 229. 14. 1089900200020 0.57 120. 225. 16. 1089900200021 0.57 134.3 239. 10. 1089900200022 1.0 25. 1496. 24. 1089900200023 1.0 30. 1315. 14. 1089900200024 1.0 40. 934. 33. 1089900200025 1.0 55. 418. 18. 1089900200026 1.0 70. 198. 14. 1089900200027 1.0 90. 145. 11. 1089900200028 1.0 100. 162. 11. 1089900200029 1.0 110. 162. 10. 1089900200030 1.0 120. 143. 15. 1089900200031 1.0 134.3 93. 9. 1089900200032 1.5 20. 2069. 33. 1. 1089900200033 1.5 25. 1645. 28. 1. 1089900200034 1.5 30. 1340. 22. 1. 1089900200035 1.5 40. 670. 17. 1. 1089900200036 1.5 55. 180. 13. 1. 1089900200037 1.5 70. 73. 13. 1. 1089900200038 1.5 90. 195. 9. 1. 1089900200039 1.5 110. 166. 10. 1. 1089900200040 1.5 120. 119. 10. 1. 1089900200041 1.5 134.3 41. 9. 1. 1089900200042 ENDDATA 32 0 1089900200043 ENDSUBENT 42 0 1089900299999 SUBENT 10899003 20200229 14641089900300001 BIB 3 5 1089900300002 REACTION (94-PU-242(N,EL)94-PU-242,,SIG) 1089900300003 FLAG (1.) Assumes inelastic contribution of 1.2-barns. 1089900300004 Could not be experimentally resolved. Subtracted from 1089900300005 measurements to get quoted values. 1089900300006 STATUS (DEP,10899002) 1089900300007 ENDBIB 5 0 1089900300008 NOCOMMON 0 0 1089900300009 DATA 4 3 1089900300010 EN DATA ERR-S FLAG 1089900300011 MEV B B NO-DIM 1089900300012 0.57 5.91 0.70 1089900300013 1.0 4.3 0.5 1089900300014 1.5 3.94 0.5 1. 1089900300015 ENDDATA 5 0 1089900300016 ENDSUBENT 15 0 1089900399999 SUBENT 10899004 20200229 14641089900400001 BIB 1 1 1089900400002 REACTION (94-PU-242(N,INL)94-PU-242,PAR,DA) 1089900400003 ENDBIB 1 0 1089900400004 NOCOMMON 0 0 1089900400005 DATA 5 28 1089900400006 EN E-LVL ANG DATA ERR-S 1089900400007 MEV KEV ADEG MB/SR MB/SR 1089900400008 0.57 45. 30. 117. 28. 1089900400009 0.57 45. 40. 117. 33. 1089900400010 0.57 45. 55. 119. 14. 1089900400011 0.57 45. 70. 84. 12. 1089900400012 0.57 45. 90. 103. 15. 1089900400013 0.57 45. 110. 90. 8. 1089900400014 0.57 45. 120. 98. 7. 1089900400015 0.57 45. 134.3 102. 7. 1089900400016 1.0 45. 25. 85. 25. 1089900400017 1.0 45. 30. 77. 25. 1089900400018 1.0 45. 40. 105. 12. 1089900400019 1.0 45. 55. 123. 14. 1089900400020 1.0 45. 70. 104. 12. 1089900400021 1.0 45. 90. 109. 12. 1089900400022 1.0 45. 100. 78. 9. 1089900400023 1.0 45. 110. 77. 9. 1089900400024 1.0 45. 120. 88. 10. 1089900400025 1.0 45. 134.3 68. 8. 1089900400026 1.0 148. 25. 36. 6. 1089900400027 1.0 148. 30. 32. 6. 1089900400028 1.0 148. 40. 41. 5. 1089900400029 1.0 148. 55. 34. 5. 1089900400030 1.0 148. 70. 33. 6. 1089900400031 1.0 148. 90. 23. 4. 1089900400032 1.0 148. 100. 35. 5. 1089900400033 1.0 148. 110. 35. 5. 1089900400034 1.0 148. 120. 29. 4. 1089900400035 1.0 148. 134.3 24. 4. 1089900400036 ENDDATA 30 0 1089900400037 ENDSUBENT 36 0 1089900499999 SUBENT 10899005 20200229 14641089900500001 BIB 2 2 1089900500002 REACTION (94-PU-242(N,INL)94-PU-242,PAR,SIG) 1089900500003 STATUS (DEP,10899004) 1089900500004 ENDBIB 2 0 1089900500005 NOCOMMON 0 0 1089900500006 DATA 4 3 1089900500007 EN E-LVL DATA ERR-S 1089900500008 MEV KEV B B 1089900500009 0.57 45. 1.28 0.18 1089900500010 1.0 45. 1.19 0.17 1089900500011 1.0 148. 0.42 0.08 1089900500012 ENDDATA 5 0 1089900500013 ENDSUBENT 12 0 1089900599999 ENDENTRY 5 0 1089999999999