ENTRY 23178 20110103 22302317800000001 SUBENT 23178001 20110103 22302317800100001 BIB 17 52 2317800100002 AUTHOR (F.Carrel,M.Agelou,M.Gmar,F.Laine,J.Loridon,J.-L.Ma, 2317800100003 C.Passard, B.Poumarede) 2317800100004 TITLE New experimental results on the cumulative yields from 2317800100005 thermal fission of U-235 and Pu-239 and from 2317800100006 photofission of U-235 and U-238 induced by 2317800100007 bremsstrahlung. 2317800100008 REFERENCE (J,IRE,58,(4),2064,2011) Main reference. 2317800100009 #doi:10.1109/TNS.2011.2157169 2317800100010 REL-REF (O,M0841001,F.Carrel+,J,IRE,58,(4),2064,2011) 2317800100011 Cumulative yields for photofission of U-235 and U-238 2317800100012 (R,,A.C.Nzuruba,J,NIM/A,424,425,1999) 2317800100013 Pa-234m decay data. 2317800100014 INSTITUTE (2FR CAD) 2317800100015 PART-DET (DN) Delayed neutrons and 2317800100016 (G) delayed gamma-rays. 2317800100017 FACILITY (NGEN,2FR CAD) PROMETHEE facility at CEA Cadarache. 2317800100018 Pulse duration 500 microsec, frequency 50 Hz. 2317800100019 INC-SOURCE (D-T) 2317800100020 INC-SPECT 14-MeV neutrons were moderated by graphite blocks to 2317800100021 obtain thermal flux near sample position. 2317800100022 METHOD (ACTIV) Total irradiation 30 min. 2317800100023 For detection of delayed neutrons - cooling time at the2317800100024 end of each pulse15.46 ms, counting time 4 ms. 2317800100025 For delayed gammas - cooling time 60 s. 2317800100026 SAMPLE U and Pu samples in metallic form . 2317800100027 DETECTOR (HE3SP) 88 He-3 counters - to detect prompt and delayed2317800100028 neutrons. 2317800100029 Delayed neutron efficiency was computed using different2317800100030 methods comparing exp.results (Cf-252,U-235,Pu-239, 2317800100031 prompt neutron efficiencies) and simulated values 2317800100032 (MCNPX). 2317800100033 Simulated value for delayed neutron efficiency 2317800100034 3.96E-2 ( +-0.57%) for U-235 and Pu-239. 2317800100035 (HPGE) Delayed gammas were detected by n-type HPGe 2317800100036 detector Canberra GR 3018, relative efficiency 30%, 2317800100037 diameter 52 mm, length 46 mm, coupled with digital 2317800100038 gamma-ray spectrometer ORTEC DSPECPro. 2317800100039 The absolute gamma efficiencies were determined using 2317800100040 the irradiated samples directly by 1001.0keV gamma-line2317800100041 of Pa-234m,granddaughter of U-238, to be 7.808E-4 with 2317800100042 relative 1 sigma uncertainty 1.51%. 2317800100043 DECAY-DATA (91-PA-234-M,,DG,1001.0,0.00835) 2317800100044 CORRECTION Dead time correction. 2317800100045 ANALYSIS Peak area analysis. Net peak areas were extracted 2317800100046 using Matlab tools developed by authors. 2317800100047 Absolute intensities of delayed gamma-rays were taken 2317800100048 mainly from ENDF/B-VI.8 database 2317800100049 ERR-ANALYS (ERR-1) Uncertainty of delayed neutron efficiency. 2317800100050 (ERR-2) Uncertainty in absolute gamma efficiencies. 2317800100051 (ERR-T,9.,11.) Total uncertainty, includes ERR-1,ERR-2 2317800100052 and statistical uncertainty. 2317800100053 HISTORY (20120104C) M.M. 2317800100054 ENDBIB 52 0 2317800100055 COMMON 3 3 2317800100056 EN-DUMMY ERR-1 ERR-2 2317800100057 EV PER-CENT PER-CENT 2317800100058 0.0253 4. 8. 2317800100059 ENDCOMMON 3 0 2317800100060 ENDSUBENT 59 0 2317800199999 SUBENT 23178002 20110103 22302317800200001 BIB 4 36 2317800200002 REACTION (92-U-235(N,F)ELEM/MASS,CUM,FY) 2317800200003 Exp. measured cumulative yields. 2317800200004 COMMENT Yields of Kr-88,Rb-88,Sr-91,Nb-92m were measured 2317800200005 after a cooling time 5 hr. 2317800200006 Yields of Sr92 and Sb-130 were measured after 2317800200007 cooling time 31 min. 2317800200008 DECAY-DATA ((1.)36-KR-88,,DG,1529.8) 2317800200009 ((2.)36-KR-88,,DG,2392.1) 2317800200010 ((3.)37-RB-88,,DG,898.0) 2317800200011 ((4.)37-RB-88,,DG,1836.0) 2317800200012 ((5.)37-RB-89,,DG,1031.9) 2317800200013 ((6.)37-RB-89,,DG,1248.1) 2317800200014 ((7.)38-SR-91,,DG,749.8) 2317800200015 ((8.)38-SR-91,,DG,1024.3) 2317800200016 ((9.)38-SR-92,2.554HR,DG,1383.9) 2317800200017 2.554hr+-36sec was measured in this experiment. 2317800200018 ((10.)38-SR-93,,DG,875.8) 2317800200019 ((11.)38-SR-94,,DG,1427.6) 2317800200020 ((12.)39-Y-94,,DG,918.7) 2317800200021 ((13.)39-Y-95,,DG,954.2) 2317800200022 ((14.)39-Y-95,,DG,2176.0) 2317800200023 ((15.)41-NB-97-M,,DG,743.3) 2317800200024 ((16.)51-SB-130,,DG,793.4) 2317800200025 ((17.)51-SB-130,,DG,839.4) 2317800200026 ((18.)51-SB-131,,DG,943.4) 2317800200027 ((19.)52-TE-133-M,,DG,912.7) 2317800200028 ((20.)53-I-135,,DG,1038.8) 2317800200029 ((21.)53-I-135,,DG,1131.5) 2317800200030 ((22.)53-I-135,,DG,1260.4) 2317800200031 ((23.)53-I-135,,DG,1678.0) 2317800200032 ((24.)53-I-135,,DG,1791.2) 2317800200033 ((25.)54-XE-138,,DG,1768.3) 2317800200034 ((26.)54-XE-138,,DG,2015.8) 2317800200035 ((27.)55-CS-139,,DG,1283.2) 2317800200036 ((28.)56-BA-142,,DG,1078.7) 2317800200037 STATUS (TABLE) Table II of J,IRE,58,(4),2064,2011. 2317800200038 ENDBIB 36 0 2317800200039 NOCOMMON 0 0 2317800200040 DATA 5 28 2317800200041 ELEMENT MASS ISOMER DATA DECAY-FLAG 2317800200042 NO-DIM NO-DIM NO-DIM PRD/FIS NO-DIM 2317800200043 36. 88. 3.24E-2 1. 2317800200044 36. 88. 3.36E-2 2. 2317800200045 37. 88. 3.71E-2 3. 2317800200046 37. 88. 3.55E-2 4. 2317800200047 37. 89. 5.65E-2 5. 2317800200048 37. 89. 5.44E-2 6. 2317800200049 38. 91. 5.81E-2 7. 2317800200050 38. 91. 6.04E-2 8. 2317800200051 38. 92. 5.91E-2 9. 2317800200052 38. 93. 7.60E-2 10. 2317800200053 38. 94. 5.61E-2 11. 2317800200054 39. 94. 6.35E-2 12. 2317800200055 39. 95. 7.22E-2 13. 2317800200056 39. 95. 6.08E-2 14. 2317800200057 41. 97. 1. 6.49E-2 15. 2317800200058 51. 130. 0.60E-2 16. 2317800200059 51. 130. 0.59E-2 17. 2317800200060 51. 131. 3.05E-2 18. 2317800200061 52. 133. 1. 3.74E-2 19. 2317800200062 53. 135. 6.41E-2 20. 2317800200063 53. 135. 6.54E-2 21. 2317800200064 53. 135. 6.38E-2 22. 2317800200065 53. 135. 6.29E-2 23. 2317800200066 53. 135. 6.11E-2 24. 2317800200067 54. 130. 6.54E-2 25. 2317800200068 54. 130. 6.37E-2 26. 2317800200069 55. 139. 6.59E-2 27. 2317800200070 56. 142. 5.80E-2 28. 2317800200071 ENDDATA 30 0 2317800200072 ENDSUBENT 71 0 2317800299999 SUBENT 23178003 20110103 22302317800300001 BIB 4 23 2317800300002 REACTION (94-PU-239(N,F)ELEM/MASS,CUM,FY) 2317800300003 Exp. measured cumulative yields. 2317800300004 COMMENT Yields of Sr92 and Sb-130 were measured after 2317800300005 cooling time 31 min. 2317800300006 DECAY-DATA ((1.)36-KR-88,,DG,2392.1) 2317800300007 ((2.)37-RB-89,,DG,1031.9) 2317800300008 ((3.)37-RB-89,,DG,1248.1) 2317800300009 ((4.)38-SR-92,2.554HR,DG,1383.9) 2317800300010 2.554hr+-36sec was measured in this experiment. 2317800300011 ((5.)38-SR-93,,DG,875.8) 2317800300012 ((6.)38-SR-94,,DG,1427.6) 2317800300013 ((7.)39-Y-94,,DG,918.7) 2317800300014 ((8.)39-Y-95,,DG,954.2) 2317800300015 ((9.)39-Y-95,,DG,2176.0) 2317800300016 ((10.)51-SB-130,,DG,793.4) 2317800300017 ((11.)51-SB-130,,DG,839.4) 2317800300018 ((12.)51-SB-131,,DG,943.4) 2317800300019 ((13.)52-TE-133-M,,DG,912.7) 2317800300020 ((14.)54-XE-138,,DG,1768.3) 2317800300021 ((15.)54-XE-138,,DG,2015.8) 2317800300022 ((16.)55-CS-139,,DG,1283.2) 2317800300023 ((17.)56-BA-142,,DG,1078.7) 2317800300024 STATUS (TABLE) Table III of J,IRE,58,(4),2064,2011. 2317800300025 ENDBIB 23 0 2317800300026 NOCOMMON 0 0 2317800300027 DATA 5 17 2317800300028 ELEMENT MASS ISOMER DATA DECAY-FLAG 2317800300029 NO-DIM NO-DIM NO-DIM PRD/FIS NO-DIM 2317800300030 36. 88. 1.29E-2 1. 2317800300031 37. 89. 1.93E-2 2. 2317800300032 37. 89. 1.83E-2 3. 2317800300033 38. 92. 2.87E-2 4. 2317800300034 38. 93. 5.30E-2 5. 2317800300035 38. 94. 3.42E-2 6. 2317800300036 39. 94. 4.13E-2 7. 2317800300037 39. 95. 4.86E-2 8. 2317800300038 39. 95. 4.26E-2 9. 2317800300039 51. 130. 1.01E-2 10. 2317800300040 51. 130. 0.92E-2 11. 2317800300041 51. 131. 2.79E-2 12. 2317800300042 52. 133. 1. 4.11E-2 13. 2317800300043 54. 138. 4.84E-2 14. 2317800300044 54. 138. 5.31E-2 15. 2317800300045 55. 139. 7.32E-2 16. 2317800300046 56. 142. 4.46E-2 17. 2317800300047 ENDDATA 19 0 2317800300048 ENDSUBENT 47 0 2317800399999 ENDENTRY 3 0 2317899999999