ENTRY 23116 20160724 22522311600000001 SUBENT 23116001 20160724 22522311600100001 BIB 11 91 2311600100002 TITLE Ternary particles emission in spontaneous fission of 2311600100003 Cf-250 and Cf-252 and in neutron induced fission of 2311600100004 Cf-249 and Cf-251. 2311600100005 AUTHOR (S.Vermote, C.Wagemans, O.Serot, J.Heyse, J.Van Gils, 2311600100006 T.Soldner, P.Geltenbort, I.AlMahamid, G.Tian, L.Rao) 2311600100007 INSTITUTE (2BLGGHT) S.Vermote, C.Wagemans. 2311600100008 (2FR CAD) O.Serot. 2311600100009 (2BLGMOL) J.Heyse. 2311600100010 (2ZZZGEL) J.Heyse, J.Van Gils. 2311600100011 (2FR ILL) T.Soldner, P.Geltenbort. 2311600100012 (1USABRK) I.AlMahamid. 2311600100013 Wadsworth Center, New York State Department of Health,2311600100014 Albany, NY 12201, USA - G.Tian, L.Rao. 2311600100015 REFERENCE (J,NP/A,837,176,2010) 2311600100016 Main reference. 2311600100017 (S,AIP-1175,303,2009) Proc. of 4th Int.Workshop on 2311600100018 Nuclear Fission and Fission-Product Spectroscopy, 2311600100019 Cadarache,France,13-16 May 2009. 2311600100020 Cf-250 data. 2311600100021 REL-REF (O,23048001,S.Vermote+,J,NP/A,837,176,2010) 2311600100022 Data for (n,f) of Cf-249, -251. 2311600100023 SAMPLE Cf-250 sample of 6mm diameter, 1 microg mass, 4 MBq 2311600100024 activity; prepared at Lawrence Berkeley National Lab. 2311600100025 The isotopic composition of the basic material 2311600100026 on 7th of June 2000 was as follows: 2311600100027 Cf-249 -10.65%, Cf-250 -77.21%, Cf-251 -12.14%. 2311600100028 The measurement started in March 2008. 2311600100029 Cf-252 sample as spot of californium oxide of 15 mm 2311600100030 diameter, deposited on a 25 microm thick Al foil. 2311600100031 The activity at moment of preparation (November 2002) 2311600100032 37 kBq, corresponding to 0.0019 microg of Cf-252. 2311600100033 DETECTOR (TELES,SIBAR) The measurement with two different 2311600100034 telescope detectors was performed in order to examine 2311600100035 the spontaneous fission of Cf-250. Telescope 1 -for the2311600100036 detection of ternary LRA and He-6 particles, 2311600100037 telescope 2 -to detect tritons. Mounted in vacuum 2311600100038 chamber, at a distance of about 35 mm of the Cf-250 2311600100039 sample. For the ternary fission measurements, deltaE 2311600100040 detector was shielded with a 25 microm thick Al foil. 2311600100041 The energy calibration was done based on radioactive 2311600100042 alpha decay energies of Sm-147 (Ealpha=2.235 MeV), 2311600100043 U-238 (Ealpha=4.198 MeV), Np-237 (Ealpha=4.790 MeV), 2311600100044 Am-241 (Ealpha=5.486 MeV), Cm-244 (Ealpha=5.805 MeV). 2311600100045 -Measurement with two different telescope detectors was2311600100046 performed to examine the spontaneous fission of Cf-252.2311600100047 Telescope 1 -for the detection of ternary LRA and He-6,2311600100048 telescope 2 -to detect tritons. Since the Cf-252 sample2311600100049 has an Al backing, both telescopes could be 2311600100050 simultaneously mounted in a vacuum chamber. For ternary2311600100051 fission measurements, the deltaE detector facing the 2311600100052 sample was shielded with a 25 microm thick Al foil. 2311600100053 Separate measurement with a third telescope was 2311600100054 performed to examine the non-Gaussian tailing on the 2311600100055 low-energy side of the energy distribution for the 2311600100056 alpha particles. 2311600100057 Characteristics of the surface barrier telescope 2311600100058 detectors used: 2311600100059 Cf-250 : 2311600100060 telescope 1 telescope 2 2311600100061 deltaE: 2311600100062 area,mm**2 300 300 2311600100063 thickness,microm 29.8 55.1 2311600100064 resolution,keV 41 45 2311600100065 E: 2311600100066 area,mm**2 450 450 2311600100067 thickness,microm 500 1500 2311600100068 resolution,keV 19 21 2311600100069 Cf-252: 2311600100070 telescope 1 telescope 2 telescope 32311600100071 deltaE: 2311600100072 area,mm**2 300 300 300 2311600100073 thickness,microm 29.8 41 35 2311600100074 resolution,keV 41 31 34 2311600100075 E: 2311600100076 area,mm**2 450 450 450 2311600100077 thickness,microm 500 1500 500 2311600100078 resolution,keV 20 21 20 2311600100079 METHOD (EDE,COINC) Measurement consists of: 2311600100080 - identification of the ternary particles with deltaE-E2311600100081 telescope detector and the subsequent determination of 2311600100082 the ternary alpha, triton and He-6 energy distributions2311600100083 and counting rates; 2311600100084 - determination of the fission counting rate with the E2311600100085 detector. 2311600100086 ERR-ANALYS (DATA-ERR) Uncertainties given on the values are 2311600100087 combination of statistical and systematic uncertainties2311600100088 ADD-RES (COMP) Comparison with data found in literature - 2311600100089 tables 5,6,7 of J,NP/A,837,176,2010. 2311600100090 HISTORY (20101004C) M.M. 2311600100091 (20160724U) SD: AIP-1175,303,2010 -> AIP-1175,303,2009.2311600100092 Information from STATUS 'COREL' moved to REL-REF. 2311600100093 ENDBIB 91 0 2311600100094 NOCOMMON 0 0 2311600100095 ENDSUBENT 94 0 2311600199999 SUBENT 23116002 20101004 22232311600200001 BIB 5 10 2311600200002 REACTION (98-CF-250(0,F)2-HE-4,TER,KE) Ternary alpha particles 2311600200003 average kinetic energy . 2311600200004 Measurement by telescope 1. 2311600200005 ANALYSIS Energy distribution fit by Gauss curve to data points 2311600200006 above 12.5 MeV to avoid the influence of the 2311600200007 non-Gaussian low energy tail. 2311600200008 CORRECTION For energy loss in Al foil. 2311600200009 MISC-COL (MISC) Full width of the alpha energy spectrum - FWHM 2311600200010 STATUS (TABLE) Table 3 of J,NP/A,837,176,2010. 2311600200011 = Table 3 of S,AIP-1175,303,2010. 2311600200012 ENDBIB 10 0 2311600200013 NOCOMMON 0 0 2311600200014 DATA 4 1 2311600200015 DATA DATA-ERR MISC MISC-ERR 2311600200016 MEV MEV MEV MEV 2311600200017 15.95 0.13 10.49 0.16 2311600200018 ENDDATA 3 0 2311600200019 ENDSUBENT 18 0 2311600299999 SUBENT 23116003 20101004 22232311600300001 BIB 5 9 2311600300002 REACTION (98-CF-250(0,F)1-H-3,TER,KE) Ternary triton particles 2311600300003 average kinetic energy. 2311600300004 Measurement by setup with a thicker deltaE detector 2311600300005 (telescope 2). 2311600300006 ANALYSIS Energy distribution fit by Gauss curve to all points. 2311600300007 CORRECTION For background contribution and energy loss in Al foil.2311600300008 MISC-COL (MISC) Full width of the triton energy spectrum - FWHM2311600300009 STATUS (TABLE) Table 3 of J,NP/A,837,176,2010. 2311600300010 = Table 3 of S,AIP-1175,303,2010. 2311600300011 ENDBIB 9 0 2311600300012 NOCOMMON 0 0 2311600300013 DATA 4 1 2311600300014 DATA DATA-ERR MISC MISC-ERR 2311600300015 MEV MEV MEV MEV 2311600300016 8.31 0.30 8.58 0.49 2311600300017 ENDDATA 3 0 2311600300018 ENDSUBENT 17 0 2311600399999 SUBENT 23116004 20101004 22232311600400001 BIB 5 8 2311600400002 REACTION (98-CF-250(0,F)2-HE-6,TER,KE) Ternary He-6 particles 2311600400003 average kinetic energy. 2311600400004 Measurement by telescope 1. 2311600400005 ANALYSIS Energy distribution fit by Gauss curve to all points. 2311600400006 CORRECTION For energy loss in Al foil. 2311600400007 MISC-COL (MISC) Full width of the He-6 energy spectrum - FWHM 2311600400008 STATUS (TABLE) Table 3 of J,NP/A,837,176,2010. 2311600400009 = Table 3 of S,AIP-1175,303,2010. 2311600400010 ENDBIB 8 0 2311600400011 NOCOMMON 0 0 2311600400012 DATA 4 1 2311600400013 DATA DATA-ERR MISC MISC-ERR 2311600400014 MEV MEV MEV MEV 2311600400015 10.64 0.30 10.49 0.54 2311600400016 ENDDATA 3 0 2311600400017 ENDSUBENT 16 0 2311600499999 SUBENT 23116005 20101004 22232311600500001 BIB 4 8 2311600500002 REACTION (98-CF-252(0,F)2-HE-4,TER,KE) Ternary alpha particles 2311600500003 average kinetic energy. 2311600500004 Measurement by telescope 1 and telescope 3. 2311600500005 Weighted average of both results. 2311600500006 ANALYSIS Energy distribution fit by Gauss curve to data points 2311600500007 above 12.5 MeV. 2311600500008 MISC-COL (MISC) Full width of the alpha energy spectrum - FWHM 2311600500009 STATUS (TABLE) Table 3 of J,NP/A,837,176,2010. 2311600500010 ENDBIB 8 0 2311600500011 NOCOMMON 0 0 2311600500012 DATA 4 1 2311600500013 DATA DATA-ERR MISC MISC-ERR 2311600500014 MEV MEV MEV MEV 2311600500015 15.96 0.09 10.22 0.18 2311600500016 ENDDATA 3 0 2311600500017 ENDSUBENT 16 0 2311600599999 SUBENT 23116006 20101004 22232311600600001 BIB 5 7 2311600600002 REACTION (98-CF-252(0,F)1-H-3,TER,KE) Ternary triton particles 2311600600003 average kinetic energy. 2311600600004 Measurement by telescope 2. 2311600600005 ANALYSIS Energy distribution fit by Gauss curve to all points. 2311600600006 CORRECTION For background. 2311600600007 MISC-COL (MISC) Full width of the triton energy spectrum - FWHM2311600600008 STATUS (TABLE) Table 3 of J,NP/A,837,176,2010. 2311600600009 ENDBIB 7 0 2311600600010 NOCOMMON 0 0 2311600600011 DATA 4 1 2311600600012 DATA DATA-ERR MISC MISC-ERR 2311600600013 MEV MEV MEV MEV 2311600600014 8.55 0.28 8.26 0.43 2311600600015 ENDDATA 3 0 2311600600016 ENDSUBENT 15 0 2311600699999 SUBENT 23116007 20101004 22232311600700001 BIB 4 6 2311600700002 REACTION (98-CF-252(0,F)2-HE-6,TER,KE) Ternary He-6 particles 2311600700003 average kinetic energy. 2311600700004 Measurement by telescope 1. 2311600700005 ANALYSIS Energy distribution fit by Gauss curve to all points. 2311600700006 MISC-COL (MISC) Full width of the He-6 energy spectrum - FWHM 2311600700007 STATUS (TABLE) Table 3 of J,NP/A,837,176,2010. 2311600700008 ENDBIB 6 0 2311600700009 NOCOMMON 0 0 2311600700010 DATA 4 1 2311600700011 DATA DATA-ERR MISC MISC-ERR 2311600700012 MEV MEV MEV MEV 2311600700013 11.22 0.52 8.95 0.81 2311600700014 ENDDATA 3 0 2311600700015 ENDSUBENT 14 0 2311600799999 SUBENT 23116008 20101004 22232311600800001 BIB 2 4 2311600800002 REACTION (98-CF-250(0,F)2-HE-4,TER,FY) Ternary alpha particles 2311600800003 emission probability - LRA/B . 2311600800004 STATUS (TABLE) Table 4 of J,NP/A,837,176,2010. 2311600800005 = Table 3 of S,AIP-1175,303,2010. 2311600800006 ENDBIB 4 0 2311600800007 NOCOMMON 0 0 2311600800008 DATA 2 1 2311600800009 DATA DATA-ERR 2311600800010 PRD/FIS PRD/FIS 2311600800011 2.93 E-3 0.10 E-3 2311600800012 ENDDATA 3 0 2311600800013 ENDSUBENT 12 0 2311600899999 SUBENT 23116009 20101004 22232311600900001 BIB 2 4 2311600900002 REACTION (98-CF-250(0,F)1-H-3,TER,FY) Ternary triton particles 2311600900003 emission probability - t/B . 2311600900004 STATUS (TABLE) Table 4 of J,NP/A,837,176,2010. 2311600900005 = Table 3 of S,AIP-1175,303,2010. 2311600900006 ENDBIB 4 0 2311600900007 NOCOMMON 0 0 2311600900008 DATA 2 1 2311600900009 DATA DATA-ERR 2311600900010 PRD/FIS PRD/FIS 2311600900011 2.08 E-4 0.27 E-4 2311600900012 ENDDATA 3 0 2311600900013 ENDSUBENT 12 0 2311600999999 SUBENT 23116010 20101004 22232311601000001 BIB 2 4 2311601000002 REACTION (98-CF-250(0,F)2-HE-6,TER,FY) Ternary He-6 particles 2311601000003 emission probability - He-6/B . 2311601000004 STATUS (TABLE) Table 4 of J,NP/A,837,176,2010. 2311601000005 = Table 3 of S,AIP-1175,303,2010. 2311601000006 ENDBIB 4 0 2311601000007 NOCOMMON 0 0 2311601000008 DATA 2 1 2311601000009 DATA DATA-ERR 2311601000010 PRD/FIS PRD/FIS 2311601000011 8.03 E-5 1.00 E-5 2311601000012 ENDDATA 3 0 2311601000013 ENDSUBENT 12 0 2311601099999 SUBENT 23116011 20101004 22232311601100001 BIB 2 4 2311601100002 REACTION ((98-CF-250(0,F)1-H-3,TER,FY)/ 2311601100003 (98-CF-250(0,F)2-HE-4,TER,FY)) 2311601100004 STATUS (TABLE) Table 4 of J,NP/A,837,176,2010. 2311601100005 = Table 3 of S,AIP-1175,303,2010. 2311601100006 ENDBIB 4 0 2311601100007 NOCOMMON 0 0 2311601100008 DATA 2 1 2311601100009 DATA DATA-ERR 2311601100010 NO-DIM NO-DIM 2311601100011 6.96 E-2 0.89 E-2 2311601100012 ENDDATA 3 0 2311601100013 ENDSUBENT 12 0 2311601199999 SUBENT 23116012 20101004 22232311601200001 BIB 2 4 2311601200002 REACTION ((98-CF-250(0,F)2-HE-6,TER,FY)/ 2311601200003 (98-CF-250(0,F)2-HE-4,TER,FY)) 2311601200004 STATUS (TABLE) Table 4 of J,NP/A,837,176,2010. 2311601200005 = Table 3 of S,AIP-1175,303,2010. 2311601200006 ENDBIB 4 0 2311601200007 NOCOMMON 0 0 2311601200008 DATA 2 1 2311601200009 DATA DATA-ERR 2311601200010 NO-DIM NO-DIM 2311601200011 2.74 E-2 0.33 E-2 2311601200012 ENDDATA 3 0 2311601200013 ENDSUBENT 12 0 2311601299999 SUBENT 23116013 20101004 22232311601300001 BIB 2 3 2311601300002 REACTION (98-CF-252(0,F)2-HE-4,TER,FY) Ternary alpha particles 2311601300003 emission probability - LRA/B . 2311601300004 STATUS (TABLE) Table 4 of J,NP/A,837,176,2010. 2311601300005 ENDBIB 3 0 2311601300006 NOCOMMON 0 0 2311601300007 DATA 2 1 2311601300008 DATA DATA-ERR 2311601300009 PRD/FIS PRD/FIS 2311601300010 2.56 E-3 0.07 E-3 2311601300011 ENDDATA 3 0 2311601300012 ENDSUBENT 11 0 2311601399999 SUBENT 23116014 20101004 22232311601400001 BIB 2 3 2311601400002 REACTION (98-CF-252(0,F)1-H-3,TER,FY) Ternary triton particles 2311601400003 emission probability - t/B . 2311601400004 STATUS (TABLE) Table 4 of J,NP/A,837,176,2010. 2311601400005 ENDBIB 3 0 2311601400006 NOCOMMON 0 0 2311601400007 DATA 2 1 2311601400008 DATA DATA-ERR 2311601400009 PRD/FIS PRD/FIS 2311601400010 1.89 E-4 0.19 E-4 2311601400011 ENDDATA 3 0 2311601400012 ENDSUBENT 11 0 2311601499999 SUBENT 23116015 20101004 22232311601500001 BIB 2 3 2311601500002 REACTION (98-CF-252(0,F)2-HE-6,TER,FY) Ternary He-6 particles 2311601500003 emission probability - He-6/B . 2311601500004 STATUS (TABLE) Table 4 of J,NP/A,837,176,2010. 2311601500005 ENDBIB 3 0 2311601500006 NOCOMMON 0 0 2311601500007 DATA 2 1 2311601500008 DATA DATA-ERR 2311601500009 PRD/FIS PRD/FIS 2311601500010 7.68 E-5 0.72 E-5 2311601500011 ENDDATA 3 0 2311601500012 ENDSUBENT 11 0 2311601599999 SUBENT 23116016 20101004 22232311601600001 BIB 2 3 2311601600002 REACTION ((98-CF-252(0,F)1-H-3,TER,FY)/ 2311601600003 (98-CF-252(0,F)2-HE-4,TER,FY)) 2311601600004 STATUS (TABLE) Table 4 of J,NP/A,837,176,2010. 2311601600005 ENDBIB 3 0 2311601600006 NOCOMMON 0 0 2311601600007 DATA 2 1 2311601600008 DATA DATA-ERR 2311601600009 NO-DIM NO-DIM 2311601600010 7.37 E-2 0.72 E-2 2311601600011 ENDDATA 3 0 2311601600012 ENDSUBENT 11 0 2311601699999 SUBENT 23116017 20101004 22232311601700001 BIB 2 3 2311601700002 REACTION ((98-CF-252(0,F)2-HE-6,TER,FY)/ 2311601700003 (98-CF-252(0,F)2-HE-4,TER,FY)) 2311601700004 STATUS (TABLE) Table 4 of J,NP/A,837,176,2010. 2311601700005 ENDBIB 3 0 2311601700006 NOCOMMON 0 0 2311601700007 DATA 2 1 2311601700008 DATA DATA-ERR 2311601700009 NO-DIM NO-DIM 2311601700010 3.00 E-2 0.27 E-2 2311601700011 ENDDATA 3 0 2311601700012 ENDSUBENT 11 0 2311601799999 ENDENTRY 17 0 2311699999999