ENTRY 13926 20150309 14221392600000001 SUBENT 13926001 20150309 14221392600100001 BIB 15 29 1392600100002 TITLE Fission of elements from Pt to Bi by high energy 1392600100003 neutrons 1392600100004 AUTHOR (E.L.Kelly, C.Wiegand) 1392600100005 REFERENCE (J,PR,73,1135,1948) 1392600100006 INSTITUTE (1USABRK) 1392600100007 FACILITY (CYCLO,1USABRK) 184-inch cyclotron 1392600100008 INC-SOURCE Pb(d,p+n); thin lead foil bombarded by deuterons which 1392600100009 are stripped of protons in the lead. 1392600100010 SAMPLE Thin (0.72 mg/cm2) and thick (120 mg/cm2) ThO2 on Al 1392600100011 backing as monitors. 1392600100012 DETECTOR (FISCH) Ar gas filled ionization chamber with parallel 1392600100013 plates (100 cm2, separated by 1.5 cm) mounted on 1392600100014 steel housing. 1392600100015 MONITOR (90-TH-232(N,F),,SIG) 1392600100016 METHOD (PHD) 1392600100017 ANALYSIS Values were corrected for author reported background. 1392600100018 COMMENT By author: 1392600100019 The use of thick samples in the measurement of fission 1392600100020 yields causes the observed yields to depend upon 1392600100021 pulse height, which in turn depends upon the 1392600100022 ionization released by the recoil fission fragment. 1392600100023 With the operating conditions used in our experiment 1392600100024 this means that the thick sample yield values 1392600100025 probably are uncertain by as much as 20%. 1392600100026 ADD-RES Bi,Pb,Tl,Hg,Au,Pt(n,f) energy dependent relative thick 1392600100027 target fission yields in Fig.4 of Phys.Rev.73,1135 1392600100028 (1948). 1392600100029 ERR-ANALYS 20% error due to finite sample thickness 1392600100030 HISTORY (20150309C) Benjaminas Marcinkevicius 1392600100031 ENDBIB 29 0 1392600100032 NOCOMMON 0 0 1392600100033 ENDSUBENT 32 0 1392600199999 SUBENT 13926002 20150309 14221392600200001 BIB 3 5 1392600200002 REACTION ((83-BI-209(N,F),,SIG,,RAW)/(90-TH-232(N,F),,SIG,,RAW))1392600200003 Fission yield ratio not corrected for sample thickness 1392600200004 SAMPLE Thick (10 mg/cm2) Bi on Al backing; 1392600200005 thick (120 mg/cm2) ThO2 on Al backing 1392600200006 STATUS (TABLE) Table II of Phys.Rev.73(1948)1135 1392600200007 ENDBIB 5 0 1392600200008 NOCOMMON 0 0 1392600200009 DATA 3 1 1392600200010 EN EN-RSL-FW DATA 1392600200011 MEV MEV NO-DIM 1392600200012 84.0 20.9 0.019 1392600200013 ENDDATA 3 0 1392600200014 ENDSUBENT 13 0 1392600299999 SUBENT 13926003 20150309 14221392600300001 BIB 3 5 1392600300002 REACTION ((81-TL-0(N,F),,SIG,,RAW)/(90-TH-232(N,F),,SIG,,RAW)) 1392600300003 Fission yield ratio not corrected for sample thickness 1392600300004 SAMPLE Tl foil thick compared to the fission fragment range; 1392600300005 thick (120 mg/cm2) ThO2 on Al backing 1392600300006 STATUS (TABLE) Table II of Phys.Rev.73(1948)1135 1392600300007 ENDBIB 5 0 1392600300008 NOCOMMON 0 0 1392600300009 DATA 3 1 1392600300010 EN EN-RSL-FW DATA 1392600300011 MEV MEV NO-DIM 1392600300012 84.0 20.9 0.0032 1392600300013 ENDDATA 3 0 1392600300014 ENDSUBENT 13 0 1392600399999 SUBENT 13926004 20150309 14221392600400001 BIB 3 5 1392600400002 REACTION ((80-HG-0(N,F),,SIG,,RAW)/(90-TH-232(N,F),,SIG,,RAW)) 1392600400003 Fission yield ratio not corrected for sample thickness 1392600400004 SAMPLE Pool of liquid Hg; 1392600400005 thick (120 mg/cm2) ThO2 on Al backing 1392600400006 STATUS (TABLE) Table II of Phys.Rev.73(1948)1135 1392600400007 ENDBIB 5 0 1392600400008 NOCOMMON 0 0 1392600400009 DATA 3 1 1392600400010 EN EN-RSL-FW DATA 1392600400011 MEV MEV NO-DIM 1392600400012 84.0 20.9 0.0023 1392600400013 ENDDATA 3 0 1392600400014 ENDSUBENT 13 0 1392600499999 SUBENT 13926005 20150309 14221392600500001 BIB 3 5 1392600500002 REACTION ((79-AU-197(N,F),,SIG,,RAW)/(90-TH-232(N,F),,SIG,,RAW))1392600500003 Fission yield ratio not corrected for sample thickness 1392600500004 SAMPLE Au foil thick compared to the fission fragment range; 1392600500005 thick (120 mg/cm2) ThO2 on Al backing 1392600500006 STATUS (TABLE) Table II of Phys.Rev.73(1948)1135 1392600500007 ENDBIB 5 0 1392600500008 NOCOMMON 0 0 1392600500009 DATA 3 1 1392600500010 EN EN-RSL-FW DATA 1392600500011 MEV MEV NO-DIM 1392600500012 84.0 20.9 0.0020 1392600500013 ENDDATA 3 0 1392600500014 ENDSUBENT 13 0 1392600599999 SUBENT 13926006 20150309 14221392600600001 BIB 3 5 1392600600002 REACTION ((78-PT-0(N,F),,SIG,,RAW)/(90-TH-232(N,F),,SIG,,RAW)) 1392600600003 Fission yield ratio not corrected for sample thickness 1392600600004 SAMPLE Pt foil thick compared to the fission fragment range; 1392600600005 thick (120 mg/cm2) ThO2 on Al backing 1392600600006 STATUS (TABLE) Table II of Phys.Rev.73(1948)1135 1392600600007 ENDBIB 5 0 1392600600008 NOCOMMON 0 0 1392600600009 DATA 3 1 1392600600010 EN EN-RSL-FW DATA 1392600600011 MEV MEV NO-DIM 1392600600012 84.0 20.9 0.0009 1392600600013 ENDDATA 3 0 1392600600014 ENDSUBENT 13 0 1392600699999 SUBENT 13926007 20150309 14221392600700001 BIB 4 9 1392600700002 REACTION ((82-PB-206(N,F),,SIG,,A/RAW)/ 1392600700003 (90-TH-232(N,F),,SIG,,RAW)) 1392600700004 Fission yield ratio not corrected for sample thickness 1392600700005 SAMPLE (82-PB-206,ENR=0.93) with 207Pb(7%) and 208Pb(0%) 1392600700006 Similar to 208Pb enriched sample; 1392600700007 thick (120 mg/cm2) ThO2 on Al backing 1392600700008 ERR-ANALYS (DATA-ERR) Standard errors based upon internal 1392600700009 consistency 1392600700010 STATUS (TABLE) Table III of Phys.Rev.73(1948)1135 1392600700011 ENDBIB 9 0 1392600700012 NOCOMMON 0 0 1392600700013 DATA 4 1 1392600700014 EN EN-RSL-FW DATA DATA-ERR 1392600700015 MEV MEV NO-DIM NO-DIM 1392600700016 84.0 20.9 0.0071 0.0004 1392600700017 ENDDATA 3 0 1392600700018 ENDSUBENT 17 0 1392600799999 SUBENT 13926008 20150309 14221392600800001 BIB 4 10 1392600800002 REACTION ((82-PB-208(N,F),,SIG,,A/RAW)/ 1392600800003 (90-TH-232(N,F),,SIG,,RAW)) 1392600800004 Fission yield ratio not corrected for sample thickness 1392600800005 SAMPLE (82-PB-208,ENR=0.90) with 206Pb(2%) and 207Pb(8%) 1392600800006 Electroplated upon a Cu support forming a deposit which1392600800007 weighed 10 mg/cm2; 1392600800008 thick (120 mg/cm2) ThO2 on Al backing 1392600800009 ERR-ANALYS (DATA-ERR) Standard errors based upon internal 1392600800010 consistency 1392600800011 STATUS (TABLE) Table III of Phys.Rev.73(1948)1135 1392600800012 ENDBIB 10 0 1392600800013 NOCOMMON 0 0 1392600800014 DATA 4 1 1392600800015 EN EN-RSL-FW DATA DATA-ERR 1392600800016 MEV MEV NO-DIM NO-DIM 1392600800017 84.0 20.9 0.0055 0.0003 1392600800018 ENDDATA 3 0 1392600800019 ENDSUBENT 18 0 1392600899999 SUBENT 13926009 20150309 14221392600900001 BIB 4 7 1392600900002 REACTION ((82-PB-0(N,F),,SIG,,RAW)/(90-TH-232(N,F),,SIG,,RAW)) 1392600900003 Fission yield ratio not corrected for sample thickness 1392600900004 SAMPLE Thick Pb compared to the fission fragment range, 1392600900005 thick (120 mg/cm2) ThO2 on Al backing 1392600900006 ERR-ANALYS (DATA-ERR) Standard errors based upon internal 1392600900007 consistency 1392600900008 STATUS (TABLE) Table III of Phys.Rev.73(1948)1135 1392600900009 ENDBIB 7 0 1392600900010 NOCOMMON 0 0 1392600900011 DATA 4 1 1392600900012 EN EN-RSL-FW DATA DATA-ERR 1392600900013 MEV MEV NO-DIM NO-DIM 1392600900014 84.0 20.9 0.0055 0.0003 1392600900015 ENDDATA 3 0 1392600900016 ENDSUBENT 15 0 1392600999999 ENDENTRY 9 0 1392699999999