ENTRY 13747 20190628 14551374700000001 SUBENT 13747001 20190628 14551374700100001 BIB 13 55 1374700100002 TITLE Yields of correlated fragment pairs and neutron 1374700100003 multiplicity in spontaneous fission of 242Pu. 1374700100004 AUTHOR (M.Veselsky,J.Kliman,M.Morhac,J.H.Hamilton,A.V.Ramayya,1374700100005 J.Kormicki,J.O.Rasmussen,M.A.Stoyer,G.M.Ter-Akopian, 1374700100006 A.V.Daniel,G.S.Popeko,Yu.Ts.Oganessian,W.Greiner, 1374700100007 J.D.Cole,R.Aryaeinejad,GANDS collaboration) 1374700100008 INSTITUTE (1USABRK,3SLKSLO,1USAVBT,1USALRL,4ZZZDUB,2GERFRK, 1374700100009 1USAINL) 1374700100010 REFERENCE (C,98SEYSS,,254,199804) 1374700100011 #NSR: 1998VEZW 1374700100012 (J,PR/C,54,206,1996) 1374700100013 #doi:10.1103/PhysRevC.54.206 1374700100014 #NSR: 1996DA16 1374700100015 FACILITY Gammasphere at Lawrence Berkeley National Laboratory. 1374700100016 SAMPLE Plutonium source, 12.7 g of PuO2, encapsulated in 1374700100017 brass cylinders, 0.64 mm thick, to stop alpha and beta1374700100018 particles. The encapsulated source surrounded with a 1374700100019 0.5-mm silver foil to stop low energy gamma rays of 1374700100020 241Am. 1374700100021 Isotopic composition of source: 89.56 % 242Pu, 1374700100022 0.74% 238Pu, 1.33% 239Pu, 6.37% 240Pu and 1.62% 241Pu,1374700100023 and 0.42% 241Am, produced from beta decay of 241Pu. 1374700100024 The source was placed in center of Gammasphere. 1374700100025 (94-PU-242,ENR=0.8956) 1374700100026 (94-PU-238,ENR=0.0074) 1374700100027 (94-PU-239,ENR=0.0133) 1374700100028 (94-PU-240,ENR=0.0637) 1374700100029 (94-PU-241,ENR=0.0162) 1374700100030 METHOD (COINC,GSPEC) Prompt gamma-gamma coincidence 1374700100031 spectroscopy of fission fragments. 1374700100032 Yields of correlated pairs obtained using double 1374700100033 gating of 3-dimensional spectra. 1374700100034 DETECTOR (GE-IN) 32 HPGe Compton suppressed gamma detectors 1374700100035 with 80% efficiency and ~ 2.5 keV resolution for 1374700100036 1332-keV gamma rays. 1374700100037 Detector efficiency calibrated using calibration 1374700100038 sources 56Co, 152Eu, and 154Eu. 1374700100039 ANALYSIS For every combination of fission fragments the most 1374700100040 significant lines of both light and heavy fragment 1374700100041 have been used for gating. 1374700100042 CORRECTION Corrected for 1374700100043 . background, 1374700100044 . spectrometer efficiency for both gating gamma rays 1374700100045 and summed peak in gated spectrum. 1374700100046 ERR-ANALYS (DATA-ERR) Given errors include: 1374700100047 . statistical errors of the peak areas, 1374700100048 . errors in subtracting three dimensional background, 1374700100049 . uncertainty in determination of detection efficiency.1374700100050 ADD-RES Multiplicities of prompt neutrons were derived. 1374700100051 HISTORY (20010730C) IS 1374700100052 (20171112A) OS. REACTION modified in subs.2,3. 1374700100053 INSTITUTE updated. 1374700100054 (20190628A) OG. The 2-nd reference added. #NSR and 1374700100055 #doi added. STATUS in Sub.002-005 updated. 1374700100056 Sub.006-007 added. 1374700100057 ENDBIB 55 0 1374700100058 NOCOMMON 0 0 1374700100059 ENDSUBENT 58 0 1374700199999 SUBENT 13747002 20190628 14551374700200001 BIB 3 4 1374700200002 REACTION (94-PU-242(0,F)ELEM/MASS,IND/CRN,FY,,REL) 1374700200003 STATUS (TABLE) Data taken from Table 1 in the main reference. 1374700200004 HISTORY (20171112A) SF5-6 changed to IND/CRN,FY 1374700200005 (20190628U) OG. STATUS updated. 1374700200006 ENDBIB 4 0 1374700200007 COMMON 2 3 1374700200008 ELEM1 ELEM2 1374700200009 NO-DIM NO-DIM 1374700200010 44. 50. 1374700200011 ENDCOMMON 3 0 1374700200012 DATA 5 2 1374700200013 MASS1 MASS1 MASS2 DATA DATA-ERR 1374700200014 NO-DIM NO-DIM NO-DIM ARB-UNITS ARB-UNITS 1374700200015 108. 110. 130. 46. 15. 1374700200016 108. 110. 132. 16. 9. 1374700200017 ENDDATA 4 0 1374700200018 ENDSUBENT 17 0 1374700299999 SUBENT 13747003 20190628 14551374700300001 BIB 3 4 1374700300002 REACTION (94-PU-242(0,F)ELEM/MASS,IND/CRN,FY,,REL) 1374700300003 STATUS (TABLE) Data taken from Tabs.2-5 in the main reference.1374700300004 HISTORY (20171112A) SF5-6 changed to IND/CRN,FY 1374700300005 (20190628U) OG. STATUS updated. 1374700300006 ENDBIB 4 0 1374700300007 NOCOMMON 0 0 1374700300008 DATA 6 64 1374700300009 ELEM1 MASS1 ELEM2 MASS2 DATA DATA-ERR 1374700300010 NO-DIM NO-DIM NO-DIM NO-DIM ARB-UNITS ARB-UNITS 1374700300011 42. 102. 52. 134. 23. 9. 1374700300012 42. 102. 52. 136. 104. 16. 1374700300013 42. 103. 52. 134. 28. 12. 1374700300014 42. 103. 52. 136. 138. 21. 1374700300015 42. 104. 52. 132. 36. 14. 1374700300016 42. 104. 52. 133. 18. 12. 1374700300017 42. 104. 52. 134. 84. 28. 1374700300018 42. 104. 52. 136. 529. 91. 1374700300019 42. 105. 52. 134. 87. 26. 1374700300020 42. 105. 52. 136. 280. 52. 1374700300021 42. 106. 52. 132. 22. 8. 1374700300022 42. 106. 52. 133. 25. 11. 1374700300023 42. 106. 52. 134. 172. 41. 1374700300024 42. 106. 52. 136. 250. 36. 1374700300025 40. 98. 54. 139. 32. 14. 1374700300026 40. 98. 54. 140. 87. 33. 1374700300027 40. 98. 54. 141. 30. 12. 1374700300028 40. 99. 54. 138. 73. 31. 1374700300029 40. 99. 54. 139. 24. 14. 1374700300030 40. 99. 54. 140. 70. 28. 1374700300031 40. 99. 54. 141. 19. 11. 1374700300032 40. 100. 54. 137. 19. 9. 1374700300033 40. 100. 54. 138. 84. 33. 1374700300034 40. 100. 54. 139. 113. 38. 1374700300035 40. 100. 54. 140. 369. 43. 1374700300036 40. 100. 54. 141. 60. 30. 1374700300037 40. 100. 54. 142. 30. 16. 1374700300038 40. 101. 54. 137. 60. 36. 1374700300039 40. 101. 54. 138. 106. 53. 1374700300040 40. 101. 54. 139. 142. 47. 1374700300041 40. 101. 54. 140. 171. 43. 1374700300042 40. 101. 54. 141. 30. 15. 1374700300043 40. 102. 54. 136. 12. 7. 1374700300044 40. 102. 54. 137. 24. 10. 1374700300045 40. 102. 54. 138. 107. 24. 1374700300046 40. 102. 54. 139. 72. 24. 1374700300047 40. 102. 54. 140. 109. 22. 1374700300048 40. 103. 54. 138. 50. 33. 1374700300049 38. 94. 56. 142. 25. 11. 1374700300050 38. 94. 56. 143. 22. 13. 1374700300051 38. 94. 56. 144. 60. 24. 1374700300052 38. 94. 56. 145. 65. 43. 1374700300053 38. 94. 56. 146. 39. 17. 1374700300054 38. 94. 56. 147. 12. 6. 1374700300055 38. 95. 56. 142. 23. 12. 1374700300056 38. 95. 56. 143. 66. 13. 1374700300057 38. 95. 56. 144. 70. 15. 1374700300058 38. 95. 56. 145. 97. 49. 1374700300059 38. 95. 56. 146. 86. 31. 1374700300060 38. 96. 56. 142. 19. 11. 1374700300061 38. 96. 56. 143. 97. 21. 1374700300062 38. 96. 56. 144. 177. 39. 1374700300063 38. 96. 56. 145. 90. 54. 1374700300064 38. 96. 56. 146. 27. 10. 1374700300065 38. 97. 56. 143. 47. 24. 1374700300066 38. 97. 56. 144. 65. 36. 1374700300067 38. 98. 56. 140. 16. 6. 1374700300068 38. 98. 56. 142. 60. 12. 1374700300069 38. 98. 56. 143. 45. 16. 1374700300070 38. 98. 56. 144. 45. 15. 1374700300071 36. 90. 58. 148. 22. 6. 1374700300072 36. 90. 58. 150. 18. 6. 1374700300073 36. 92. 58. 148. 20. 7. 1374700300074 36. 92. 58. 150. 7. 4. 1374700300075 ENDDATA 66 0 1374700300076 ENDSUBENT 75 0 1374700399999 SUBENT 13747004 20190628 14551374700400001 BIB 3 4 1374700400002 REACTION 1(94-PU-242(0,F),,AP,LF) 1374700400003 2(94-PU-242(0,F),,AP,HF) 1374700400004 STATUS (TABLE) Data taken from text in the main reference. 1374700400005 HISTORY (20190628U) OG. STATUS updated. 1374700400006 ENDBIB 4 0 1374700400007 NOCOMMON 0 0 1374700400008 DATA 4 1 1374700400009 DATA 1DATA-ERR 1DATA 2DATA-ERR 2 1374700400010 NO-DIM NO-DIM NO-DIM NO-DIM 1374700400011 100.71 0.80 139.05 0.75 1374700400012 ENDDATA 3 0 1374700400013 ENDSUBENT 12 0 1374700499999 SUBENT 13747005 20190628 14551374700500001 BIB 3 4 1374700500002 REACTION 1(94-PU-242(0,F),,ZP,LF) 1374700500003 2(94-PU-242(0,F),,ZP,HF) 1374700500004 STATUS (TABLE) Data taken from text in the main reference. 1374700500005 HISTORY (20190628U) OG. STATUS updated. 1374700500006 ENDBIB 4 0 1374700500007 NOCOMMON 0 0 1374700500008 DATA 4 1 1374700500009 DATA 1DATA-ERR 1DATA 2DATA-ERR 2 1374700500010 NO-DIM NO-DIM NO-DIM NO-DIM 1374700500011 40.22 0.45 53.78 0.45 1374700500012 ENDDATA 3 0 1374700500013 ENDSUBENT 12 0 1374700599999 SUBENT 13747006 20190628 14551374700600001 BIB 5 16 1374700600002 REACTION (94-PU-242(0,F)ELEM/MASS,IND/CRN,FY) 1374700600003 ANALYSIS The independent yields were obtained from measured 1374700600004 relative yields by normalizing to known 1374700600005 integral-independent yields. The integral- 1374700600006 independent yields for thermal-neutron-induced fission 1374700600007 of 241Pu for the Xe-Zr pair were used as an 1374700600008 approximation to the integral-independent yields for 1374700600009 242Pu SF. This normalization is based on the assumption1374700600010 that the thermal-neutron-induced fission of 241Pu is 1374700600011 the same as 242Pu SF with extra energy. The sum of the 1374700600012 relative yields for 140Xe and 138Xe was normalized to 1374700600013 the same sum for the integral-independent yields of 1374700600014 241Pu(n,f). 1374700600015 REL-REF (R,,T.R.England+,R,LA-3106,1994) 1374700600016 STATUS (TABLE) Data from Table II in Phys.Rev.C54,568,1996. 1374700600017 HISTORY (20190628C) OG. 1374700600018 ENDBIB 16 0 1374700600019 COMMON 2 3 1374700600020 ELEM1 ELEM2 1374700600021 NO-DIM NO-DIM 1374700600022 54. 40. 1374700600023 ENDCOMMON 3 0 1374700600024 DATA 4 21 1374700600025 MASS1 MASS2 DATA DATA-ERR 1374700600026 NO-DIM NO-DIM PC/FIS PC/FIS 1374700600027 136. 100. 0.007 0.002 1374700600028 136. 101. 0.3 0.1 1374700600029 136. 102. 0.3 0.1 1374700600030 136. 103. 0.16 0.08 1374700600031 136. 104. 0.05 0.05 1374700600032 138. 98. 0.027 0.009 1374700600033 138. 99. 0.09 0.03 1374700600034 138. 100. 0.007 0.002 1374700600035 138. 101. 0.8 0.2 1374700600036 138. 102. 0.6 0.2 1374700600037 138. 103. 0.23 0.06 1374700600038 140. 98. 0.04 0.02 1374700600039 140. 99. 0.6 0.2 1374700600040 140. 100. 1.5 0.3 1374700600041 140. 101. 1.6 0.5 1374700600042 140. 102. 0.4 0.2 1374700600043 142. 96. 0.0018 0.0007 1374700600044 142. 97. 0.015 0.007 1374700600045 142. 98. 0.03 0.01 1374700600046 142. 99. 0.18 0.07 1374700600047 142. 100. 0.034 0.009 1374700600048 ENDDATA 23 0 1374700600049 ENDSUBENT 48 0 1374700699999 SUBENT 13747007 20190628 14551374700700001 BIB 3 3 1374700700002 REACTION (94-PU-242(0,F)ELEM/MASS,IND/CRN,FY,,REL) 1374700700003 STATUS (TABLE) Data in Table III-IV in Phys.Rev.C54,568,1996. 1374700700004 HISTORY (20190628C) OG. 1374700700005 ENDBIB 3 0 1374700700006 NOCOMMON 0 0 1374700700007 DATA 6 10 1374700700008 ELEM1 MASS1 ELEM2 MASS2 DATA DATA-ERR 1374700700009 NO-DIM NO-DIM NO-DIM NO-DIM ARB-UNITS ARB-UNITS 1374700700010 56. 144. 38. 93. 40. 8. 1374700700011 56. 144. 38. 94. 174. 34. 1374700700012 56. 144. 38. 95. 364. 38. 1374700700013 56. 144. 38. 96. 154. 22. 1374700700014 56. 144. 38. 97. 75. 11. 1374700700015 42. 106. 52. 128. 3. 1. 1374700700016 42. 106. 52. 130. 10. 2. 1374700700017 42. 106. 52. 131. 115. 17. 1374700700018 42. 106. 52. 134. 93. 15. 1374700700019 42. 106. 52. 136. 21. 7. 1374700700020 ENDDATA 12 0 1374700700021 ENDSUBENT 20 0 1374700799999 ENDENTRY 7 0 1374799999999