ENTRY 23305 20191114 22832330500000001 SUBENT 23305001 20191114 22832330500100001 BIB 9 60 2330500100002 AUTHOR (S.Oberstedt, A.Oberstedt, A.Gatera, A.Goeoek, 2330500100003 F.-J.Hambsch, A.Moens, G.Sibbens, D.Vanleeuw, M.Vidali)2330500100004 TITLE Prompt fission gamma-ray spectrum characteristics from 2330500100005 240Pu(sf) and 242Pu(sf). 2330500100006 REFERENCE (J,PR/C,93,054603,2016) 2330500100007 #doi:10.1103/PhysRevC.93.054603 2330500100008 (J,EPJ/CS,146,04060,2017) same data given 2330500100009 INSTITUTE (2ZZZGEL) S.Oberstedt, A.Gatera, A.Goeoek, 2330500100010 F.-J.Hambsch, A.Moens, G.Sibbens, D.Vanleeuw, M.Vidali.2330500100011 (2SWDCTH) A.Oberstedt 2330500100012 SAMPLE Targets were prepared at IRMM. 2330500100013 Target characteristics: 2330500100014 240Pu 242Pu 2330500100015 Production method Molecular Molecular 2330500100016 plating plating 2330500100017 Chemical composition,assumed Pu(OH)4 Pu(OH)4 2330500100018 Active diameter 29.95(0.1%) 29.95(0.1%) 2330500100019 Backing,thickness,mm Al, 0.25 Al, 0.25 2330500100020 Total mass,mug 119.22(0.4%) 859.54(0.9%) 2330500100021 Total area density,mug/cm2 16.92(0.4%) 122.0(0.8%) 2330500100022 Mass,mug 92.9(0.4%) 671(0.9%) 2330500100023 Area density,mug/cm2 13.19(0.4%) 95.3(0.8%) 2330500100024 Alpha activity,MBq 0.780(0.4%) 0.0984(0.3%) 2330500100025 Isotopic purity,% 99.8915(18) 99.96518(45) 2330500100026 Thin targets of 240Pu and 242Pu were placed 2330500100027 back-to-back at the central cathode position inside a 2330500100028 cylindrical twin Frisch grid ionization chamber. 2330500100029 The fission rates were 0.044/s and 0.54/s for 240Pu and2330500100030 242Pu, respectively. 2330500100031 METHOD (COINC) Gamma-Fis.Fragments coincidence. 2330500100032 Achieved timing resolution 7. ns (FWHM). 2330500100033 Number of fission events and number of gamma rays 2330500100034 detected in coincidence with a fission fragment: 2330500100035 240Pu 242Pu 2330500100036 Fissions 69642(0.4%) 847904(0.1%) 2330500100037 Gammas(background corrected) 887.5(3.4%) 8209.5(1.1%) 2330500100038 Background gammas(normalized) 1.5 17.6 2330500100039 DETECTOR (IOCH) Cylindrical twin Frisch grid ionization chamber.2330500100040 The counting gas was methane at a pressure of 2330500100041 1.08*10**5 Pa at a flow-rate of about 90 ml/min, 2330500100042 providing a detection efficiency for fission fragments 2330500100043 close to 100%. To detect fis.fragments. 2330500100044 (SCIN) Cylindrical LaBr3:Ce scintillation detector 2330500100045 (serial number A2987) of 76.2 mm diameter, 76.2 mm 2330500100046 length; mounted onto a photomultiplier tube (PMT) 2330500100047 from Hamamatsu (R10233-100-02) with a 89 mm diameter 2330500100048 quartz window. To detect gamma rays. 2330500100049 The pulse height of the gamma rays was calibrated with 2330500100050 standard radioactive sources with energies between 2330500100051 81 keV and 4.44 MeV, using 133Ba (81-356 keV), 137Cs 2330500100052 (662 keV), 60Co (1173 keV, 1333 keV), 232Th (583 keV, 2330500100053 2614 keV) and AmBe (decay of the first excited state in2330500100054 12C;Egamma = 4.44 MeV). 2330500100055 The low-energy threshold during the PFGS measurements 2330500100056 was set to 100 keV. 2330500100057 Placed at a distance of 408(2) mm relative to the 2330500100058 fission source. 2330500100059 PART-DET (G,FF) 2330500100060 HISTORY (20160820C) M.M. 2330500100061 (20191114U) SD: Ref. was added (EPJ/CS,146,04060,2017).2330500100062 ENDBIB 60 0 2330500100063 NOCOMMON 0 0 2330500100064 ENDSUBENT 63 0 2330500199999 SUBENT 23305002 20160820 22542330500200001 BIB 5 20 2330500200002 REACTION (94-PU-242(0,F)0-G-0,PR,FY) 2330500200003 Average prompt gamma multiplicity 2330500200004 ANALYSIS Detector response function was obtained by Monte Carlo 2330500200005 simulation. An exponential was fitted to the 2330500200006 experimental data above 1.8 MeV. 2330500200007 The spectral characteristics, integrated in Egamma 2330500200008 from 0.1 MeV to 7 MeV. 2330500200009 REL-REF (A,31747008,S.Oberstedt+,J,PR/C,90,024618,2014) 2330500200010 Pu241 thermal neutron induced fission 2330500200011 8.21+-0.09 prt/fis. 2330500200012 (A,,T.E.Valentine,J,ANE,28,191,2001) 2330500200013 Systematics. 6.5+-0.5 prt/fis 2330500200014 ERR-ANALYS (ERR-T) Total uncertainty includes contributions: 2330500200015 (ERR-S) Statistical ( gamma rays, fissions, number of 2330500200016 simulations). 2330500200017 (ERR-SYS) Systematic: 2330500200018 (ERR-1) Simulation ( setup, cross sections) 2330500200019 (ERR-2) Fitting detector response 2330500200020 STATUS (TABLE) Tables III, IV of J,PR/C,93,054603,2016 2330500200021 (DEP,23305008) Gamma spectrum. 2330500200022 ENDBIB 20 0 2330500200023 NOCOMMON 0 0 2330500200024 DATA 6 1 2330500200025 DATA ERR-T ERR-S ERR-SYS ERR-1 ERR-2 2330500200026 PRD/FIS PRD/FIS PRD/FIS PRD/FIS PER-CENT PER-CENT 2330500200027 6.72 0.07 0.012 0.058 55.1 44.9 2330500200028 ENDDATA 3 0 2330500200029 ENDSUBENT 28 0 2330500299999 SUBENT 23305003 20160820 22542330500300001 BIB 5 20 2330500300002 REACTION (94-PU-242(0,F)0-G-0,PR,KE) 2330500300003 Average energy per photon 2330500300004 ANALYSIS Detector response function was obtained by Monte Carlo 2330500300005 simulation. An exponential was fitted to the 2330500300006 experimental data above 1.8 MeV. 2330500300007 The spectral characteristics, integrated in Egamma 2330500300008 from 0.1 MeV to 7 MeV. 2330500300009 REL-REF (A,31747010,S.Oberstedt+,J,PR/C,90,024618,2014) 2330500300010 Pu241 thermal neutron induced fission. 0.78+-0.01 MeV. 2330500300011 (A,,T.E.Valentine,J,ANE,28,191,2001) 2330500300012 Systematics. 0.93+-0.07 MeV . 2330500300013 ERR-ANALYS (ERR-T) Total uncertainty includes contributions: 2330500300014 (ERR-S) Statistical ( gamma rays, fissions, number of 2330500300015 simulations). 2330500300016 (ERR-SYS) Systematic: 2330500300017 (ERR-1) Simulation ( setup, cross sections) 2330500300018 (ERR-2) Energy calibration 2330500300019 (ERR-3) Fitting detector response 2330500300020 STATUS (TABLE) Tables III, IV of J,PR/C,93,054603,2016 2330500300021 (DEP,23305008) Gamma spectrum. 2330500300022 ENDBIB 20 0 2330500300023 NOCOMMON 0 0 2330500300024 DATA 7 1 2330500300025 DATA ERR-T ERR-S ERR-SYS ERR-1 ERR-2 2330500300026 ERR-3 2330500300027 MEV MEV MEV MEV PER-CENT PER-CENT 2330500300028 PER-CENT 2330500300029 0.843 0.012 0.002 0.010 55.1 0.2 2330500300030 44.8 2330500300031 ENDDATA 6 0 2330500300032 ENDSUBENT 31 0 2330500399999 SUBENT 23305004 20160820 22542330500400001 BIB 5 20 2330500400002 REACTION (94-PU-242(0,F)0-G-0,PR,KE,,MSC) 2330500400003 Average total gamma-ray energy release per fission 2330500400004 ANALYSIS Detector response function was obtained by Monte Carlo 2330500400005 simulation. An exponential was fitted to the 2330500400006 experimental data above 1.8 MeV. 2330500400007 The spectral characteristics, integrated in Egamma 2330500400008 from 0.1 MeV to 7 MeV. 2330500400009 REL-REF (A,31747001,S.Oberstedt+,J,PR/C,90,024618,2014) 2330500400010 Pu241 thermal neutron induced fission 6.41+-0.06 MeV . 2330500400011 (A,,T.E.Valentine,J,ANE,28,191,2001) 2330500400012 Systematics. 6.05+-0.03 MeV . 2330500400013 ERR-ANALYS (ERR-T) Total uncertainty includes contributions: 2330500400014 (ERR-S) Statistical ( gamma rays, fissions, number of 2330500400015 simulations). 2330500400016 (ERR-SYS) Systematic: 2330500400017 (ERR-1) Simulation ( setup, cross sections) 2330500400018 (ERR-2) Energy calibration 2330500400019 (ERR-3) Fitting detector response 2330500400020 STATUS (TABLE) Tables III, IV of J,PR/C,93,054603,2016 2330500400021 (DEP,23305008) Gamma spectrum. 2330500400022 ENDBIB 20 0 2330500400023 NOCOMMON 0 0 2330500400024 DATA 7 1 2330500400025 DATA ERR-T ERR-S ERR-SYS ERR-1 ERR-2 2330500400026 ERR-3 2330500400027 MEV MEV MEV PER-CENT PER-CENT PER-CENT 2330500400028 PER-CENT 2330500400029 5.66 0.06 0.010 0.05 55. 0.3 2330500400030 44.7 2330500400031 ENDDATA 6 0 2330500400032 ENDSUBENT 31 0 2330500499999 SUBENT 23305005 20160820 22542330500500001 BIB 5 23 2330500500002 REACTION (94-PU-240(0,F)0-G-0,PR,FY) 2330500500003 Average prompt gamma multiplicity 2330500500004 ANALYSIS Standard unfolding of the measured PFGS was not 2330500500005 possible due to poor statistics. The so-called 2330500500006 transformation function was defined as ratio between 2330500500007 the emission spectrum and the measured spectrum and 2330500500008 determined from the experiment on 242Pu(sf). 2330500500009 The uncertainties of the transformation function 2330500500010 contain both the statistical ones from the measured 2330500500011 spectrum and the uncertainties of the emission 2330500500012 spectrum from the unfolding of the response function. 2330500500013 The spectral characteristics integrated from 0.1 MeV 2330500500014 to 4 MeV Egamma. 2330500500015 The spectral characteristics, integrated in Egamma 2330500500016 from 0.1 MeV to 7 MeV. 2330500500017 REL-REF (D,,T.E.Valentine,J,ANE,28,191,2001) 2330500500018 Systematics. 6.4+-0.5 prt/fis . 2330500500019 ERR-ANALYS (ERR-T) Total uncertainty. 2330500500020 (ERR-S) Statistical ( gamma rays, number of fissions) 2330500500021 (ERR-1) Total uncertainty from transformation function.2330500500022 STATUS (TABLE) Tables III, V of J,PR/C,93,054603,2016 2330500500023 In Table V ERR-T=0.35 prt/fis . 2330500500024 (DEP,23305009) Gamma spectrum. 2330500500025 ENDBIB 23 0 2330500500026 NOCOMMON 0 0 2330500500027 DATA 4 1 2330500500028 DATA ERR-T ERR-S ERR-1 2330500500029 PRD/FIS PRD/FIS PRD/FIS PRD/FIS 2330500500030 8.2 0.4 0.31 0.17 2330500500031 ENDDATA 3 0 2330500500032 ENDSUBENT 31 0 2330500599999 SUBENT 23305006 20160820 22542330500600001 BIB 5 22 2330500600002 REACTION (94-PU-240(0,F)0-G-0,PR,KE) 2330500600003 Average energy per photon 2330500600004 ANALYSIS Standard unfolding of the measured PFGS was not 2330500600005 possible due to poor statistics. The so-called 2330500600006 transformation function was defined as ratio between 2330500600007 the emission spectrum and the measured spectrum and 2330500600008 determined from the experiment on 242Pu(sf). 2330500600009 The uncertainties of the transformation function 2330500600010 contain both the statistical ones from the measured 2330500600011 spectrum and the uncertainties of the emission 2330500600012 spectrum from the unfolding of the response function. 2330500600013 The spectral characteristics integrated from 0.1 MeV 2330500600014 to 4 MeV Egamma. 2330500600015 The spectral characteristics, integrated in Egamma 2330500600016 from 0.1 MeV to 7 MeV. 2330500600017 REL-REF (D,,T.E.Valentine,J,ANE,28,191,2001) 2330500600018 Systematics. 0.95+-0.07 MeV . 2330500600019 ERR-ANALYS (ERR-T) Total uncertainty. 2330500600020 (ERR-S) Statistical ( gamma rays, number of fissions) 2330500600021 (ERR-1) Total uncertainty from transformation function.2330500600022 STATUS (TABLE) Tables III, V of J,PR/C,93,054603,2016 2330500600023 (DEP,23305009) Gamma spectrum. 2330500600024 ENDBIB 22 0 2330500600025 NOCOMMON 0 0 2330500600026 DATA 4 1 2330500600027 DATA ERR-T ERR-S ERR-1 2330500600028 MEV MEV MEV MEV 2330500600029 0.80 0.07 0.06 0.04 2330500600030 ENDDATA 3 0 2330500600031 ENDSUBENT 30 0 2330500699999 SUBENT 23305007 20160820 22542330500700001 BIB 5 23 2330500700002 REACTION (94-PU-240(0,F)0-G-0,PR,KE,,MSC) 2330500700003 Average total gamma-ray energy release per fission 2330500700004 ANALYSIS Standard unfolding of the measured PFGS was not 2330500700005 possible due to poor statistics. The so-called 2330500700006 transformation function was defined as ratio between 2330500700007 the emission spectrum and the measured spectrum and 2330500700008 determined from the experiment on 242Pu(sf). 2330500700009 The uncertainties of the transformation function 2330500700010 contain both the statistical ones from the measured 2330500700011 spectrum and the uncertainties of the emission 2330500700012 spectrum from the unfolding of the response function. 2330500700013 The spectral characteristics integrated from 0.1 MeV 2330500700014 to 4 MeV Egamma. 2330500700015 The spectral characteristics, integrated in Egamma 2330500700016 from 0.1 MeV to 7 MeV. 2330500700017 REL-REF (A,,T.E.Valentine,J,ANE,28,191,2001) 2330500700018 Systematics. 6.07+-0.03 MeV . 2330500700019 ERR-ANALYS (ERR-T) Total uncertainty. 2330500700020 (ERR-S) Statistical ( gamma rays, number of fissions) 2330500700021 (ERR-1) Total uncertainty from transformation function.2330500700022 STATUS (TABLE) Tables III, V of J,PR/C,93,054603,2016 . 2330500700023 In Table V ERR-T=0.51 MeV. 2330500700024 (DEP,23305009) Gamma spectrum. 2330500700025 ENDBIB 23 0 2330500700026 NOCOMMON 0 0 2330500700027 DATA 4 1 2330500700028 DATA ERR-T ERR-S ERR-1 2330500700029 MEV MEV MEV MEV 2330500700030 6.6 0.5 0.42 0.29 2330500700031 ENDDATA 3 0 2330500700032 ENDSUBENT 31 0 2330500799999 SUBENT 23305008 20160820 22542330500800001 BIB 3 7 2330500800002 REACTION (94-PU-242(0,F)0-G-0,PR,FY/DE) 2330500800003 Prompt gamma ray spectrum 2330500800004 REL-REF (A,31747001,S.Oberstedt+,J,PR/C,90,024618,2014) 2330500800005 Prompt gamma spectrum for Pu-241 thermal neutron 2330500800006 induced fission . 2330500800007 STATUS (UNOBT) Figs.3-5 of J,PR/C,93,054603,2016 . 2330500800008 Request for the data was sent 04.10.2016 . 2330500800009 ENDBIB 7 0 2330500800010 NOCOMMON 0 0 2330500800011 NODATA 0 0 2330500800012 ENDSUBENT 11 0 2330500899999 SUBENT 23305009 20160820 22542330500900001 BIB 2 4 2330500900002 REACTION (94-PU-240(0,F)0-G-0,PR,FY/DE) 2330500900003 Prompt gamma ray spectrum 2330500900004 STATUS (UNOBT) Fig.5 of J,PR/C,93,054603,2016 . 2330500900005 Request for the data was sent 04.10.2016 . 2330500900006 ENDBIB 4 0 2330500900007 NOCOMMON 0 0 2330500900008 NODATA 0 0 2330500900009 ENDSUBENT 8 0 2330500999999 ENDENTRY 9 0 2330599999999