ENTRY 12434 20140528 14011243400000001 SUBENT 12434001 20140528 14011243400100001 BIB 8 19 1243400100002 INSTITUTE (1USAHAN) 1243400100003 REFERENCE (P,HW-48893,98,195703) 1243400100004 (P,HW-47012,50,195612) - U-235 measurement 1243400100005 (P,HW-44525,34,1950) - U-235 measurement 1243400100006 AUTHOR (B.R.Leonard Jr,W.J.Friesen,E.J.Seppi) 1243400100007 TITLE Normalization of the Pu239 and Pu241 fission cross 1243400100008 sections. 1243400100009 FACILITY (SPECC,1USAHAN) Crystal spectrometer 1243400100010 DETECTOR (PROPC) The resulting activity of the gold and hence 1243400100011 the neutron flux of the irradiation was determined by 1243400100012 a measurement of the beta activity of the gold foil in 1243400100013 a calibrated 4Pi beta proportional counter. 1243400100014 STATUS (TABLE) Data from HW-48893,98 1243400100015 HISTORY (19760804T) Translated from SCISRS 1243400100016 (19830809A) converted to reaction formalism 1243400100017 (19860828A) BIB update. 1243400100018 (20140528A) SD: Updated to new date formats,lower case.1243400100019 Corrections according last EXFOR rules and Dict. 1243400100020 STATUS updated in Subents 8,9. Ref. on HW-44525 added.1243400100021 ENDBIB 19 0 1243400100022 NOCOMMON 0 0 1243400100023 ENDSUBENT 22 0 1243400199999 SUBENT 12434002 20140528 14011243400200001 BIB 5 17 1243400200002 REACTION (92-U-235(N,F),,SIG) 1243400200003 - average from seven measurements. 1243400200004 SAMPLE (92-U-235,ENR=0.9198) The weight of the fission foil 1243400200005 has been tentatively 1243400200006 established at O. 144 mg/cm2 by comparison alpha 1243400200007 counting against a standard foil prepared from the 1243400200008 same material by electrodeposition 1243400200009 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 1243400200010 ERR-ANALYS (ERR-T) Uncertainty includes: 1243400200011 (ERR-S) The standard statistical error of terms other 1243400200012 than those due to the weight of the U235 fission foil 1243400200013 and of the gold cross section 1243400200014 (ERR-1) An uncertainty in the weight of the U235 1243400200015 fission foil was assumed in arriving at the stated 1243400200016 uncertainty of the U235 fission cross section. 1243400200017 HISTORY (19860828A) Monitor added. 1243400200018 (20140528A) SD: SAMPLE, ERR-ANALYS added. 1243400200019 ENDBIB 17 0 1243400200020 NOCOMMON 0 0 1243400200021 DATA 6 1 1243400200022 EN DATA ERR-T MONIT ERR-S ERR-1 1243400200023 MEV B B B PER-CENT PER-CENT 1243400200024 1. -07 237.7 3.0 50.9 0.5 1.0 1243400200025 ENDDATA 3 0 1243400200026 ENDSUBENT 25 0 1243400299999 SUBENT 12434003 20140528 14011243400300001 BIB 5 30 1243400300002 REACTION (94-PU-239(N,F),,SIG) 1243400300003 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 1243400300004 SAMPLE Three plutonium fission samples were used. The weights 1243400300005 of the foils were obtained from a measured alpha 1243400300006 emission rate, the alpha half-lives of the isotopes, 1243400300007 and mass spectrometric determinations of the isotopic 1243400300008 contents of the samples. 1243400300009 Sample Foil Weight 1243400300010 1. 0.4349 mg +-1% 1243400300011 2. 0.428 mg +-1.5% 1243400300012 3. 0.9467 mg +-1.6% 1243400300013 Isotopic contents 1243400300014 Isotope Sample 1 Sample 2 Sample3 1243400300015 238Pu 0.00234 0.00274+-0.00008 1243400300016 239Pu 0.1198+-0.0010 0.3003+-0.003 0.0604+-0.002 1243400300017 240Pu 0.8746+-0.0010 0.5075+-0.005 0.3914+-0.004 1243400300018 241Pu 0.0051+-0.00005 0.1058+-0.001 0.1924+-0.003 1243400300019 251Am 0.00028 0.0008 0.0062 1243400300020 242Pu 0.00024+-0.00001 0.0625+-0.0005 0.3468+-0.004 1243400300021 ERR-ANALYS (DATA-ERR) The three values of each cross section were 1243400300022 weighted by the reciprocal squares of their 1243400300023 uncertainties and a weighted average obtained. Since 1243400300024 the assigned uncertainties of each value were 1243400300025 determined primarily by the uncertainties in the 1243400300026 isotopic contents and alpha half-lives these 1243400300027 uncertainties are not independent. The uncertainty 1243400300028 of the final answer was then chosen as the smallest 1243400300029 uncertainty of the individual determinations. 1243400300030 HISTORY (19860828A) Monitor added. 1243400300031 (20140528A) SD: SAMPLE, ERR-ANALYS added. 1243400300032 ENDBIB 30 0 1243400300033 NOCOMMON 0 0 1243400300034 DATA 4 1 1243400300035 EN DATA DATA-ERR MONIT 1243400300036 MEV B B B 1243400300037 1.0 -07 430. 14. 50.9 1243400300038 ENDDATA 3 0 1243400300039 ENDSUBENT 38 0 1243400399999 SUBENT 12434004 20140528 14011243400400001 BIB 2 3 1243400400002 REACTION (94-PU-239(N,F),,SIG,,,DERIV) 1243400400003 STATUS (DEP,12434003) From measurement at 0.10 eV and shape 1243400400004 of fission curve. 1243400400005 ENDBIB 3 0 1243400400006 NOCOMMON 0 0 1243400400007 DATA 2 1 1243400400008 EN DATA 1243400400009 MEV B 1243400400010 2.53 -08 680. 1243400400011 ENDDATA 3 0 1243400400012 ENDSUBENT 11 0 1243400499999 SUBENT 12434005 20140528 14011243400500001 BIB 2 3 1243400500002 REACTION (92-U-235(N,F),,SIG,,,DERIV) 1243400500003 STATUS (DEP,12434002) From measurement at 0.10 eV and shape 1243400500004 of fission curve. 1243400500005 ENDBIB 3 0 1243400500006 NOCOMMON 0 0 1243400500007 DATA 2 1 1243400500008 EN DATA 1243400500009 MEV B 1243400500010 2.53 -08 552. 1243400500011 ENDDATA 3 0 1243400500012 ENDSUBENT 11 0 1243400599999 SUBENT 12434006 20140528 14011243400600001 BIB 4 9 1243400600002 REACTION 1((94-PU-239(N,F),,SIG,,,DERIV)/(92-U-235(N,F),,SIG)) 1243400600003 2(94-PU-239(N,F),,SIG,,,DERIV) 1243400600004 MONITOR 2(92-U-235(N,F),,SIG) 1243400600005 STATUS (TABLE) Data taken from TID-7547,115(1957) results 1243400600006 presented for discussion. 1243400600007 (DEP,12434002) From measurement at 0.10 eV and shape of1243400600008 (DEP,12434003) fission curve. 1243400600009 HISTORY (19860828A) Monitor added. 1243400600010 (20140528A) SD: STATUS updated. 1243400600011 ENDBIB 9 0 1243400600012 NOCOMMON 0 0 1243400600013 DATA 5 1 1243400600014 EN DATA 1DATA-ERR 1DATA 2MONIT 2 1243400600015 MEV NO-DIM NO-DIM B B 1243400600016 2.53 -08 1.23 4.0 710. 577. 1243400600017 ENDDATA 3 0 1243400600018 ENDSUBENT 17 0 1243400699999 SUBENT 12434007 20140528 14011243400700001 BIB 5 30 1243400700002 REACTION (94-PU-241(N,F),,SIG) 1243400700003 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 1243400700004 SAMPLE Three plutonium fission samples were used. The weights 1243400700005 of the foils were obtained from a measured alpha 1243400700006 emission rate, the alpha half-lives of the isotopes, 1243400700007 and mass spectrometric determinations of the isotopic 1243400700008 contents of the samples. 1243400700009 Sample Foil Weight 1243400700010 1. 0.4349 mg +-1% 1243400700011 2. 0.428 mg +-1.5% 1243400700012 3. 0.9467 mg +-1.6% 1243400700013 Isotopic contents 1243400700014 Isotope Sample 1 Sample 2 Sample3 1243400700015 238Pu 0.00234 0.00274+-0.00008 1243400700016 239Pu 0.1198+-0.0010 0.3003+-0.003 0.0604+-0.002 1243400700017 240Pu 0.8746+-0.0010 0.5075+-0.005 0.3914+-0.004 1243400700018 241Pu 0.0051+-0.00005 0.1058+-0.001 0.1924+-0.003 1243400700019 251Am 0.00028 0.0008 0.0062 1243400700020 242Pu 0.00024+-0.00001 0.0625+-0.0005 0.3468+-0.004 1243400700021 ERR-ANALYS (DATA-ERR) The three values of each cross section were 1243400700022 weighted by the reciprocal squares of their 1243400700023 uncertainties and a weighted average obtained. Since 1243400700024 the assigned uncertainties of each value were 1243400700025 determined primarily by the uncertainties in the 1243400700026 isotopic contents and alpha half-lives these 1243400700027 uncertainties are not independent. The uncertainty 1243400700028 of the final answer was then chosen as the smallest 1243400700029 uncertainty of the individual determinations. 1243400700030 HISTORY (19860828A) Monitor added. 1243400700031 (20140528A) SAMPLE, ERR-ANALYS added. 1243400700032 ENDBIB 30 0 1243400700033 NOCOMMON 0 0 1243400700034 DATA 4 1 1243400700035 EN DATA DATA-ERR MONIT 1243400700036 MEV B B B 1243400700037 1.0 -07 541. 20. 50.9 1243400700038 ENDDATA 3 0 1243400700039 ENDSUBENT 38 0 1243400799999 SUBENT 12434008 20140528 14011243400800001 BIB 3 7 1243400800002 REACTION (94-PU-241(N,F),,SIG,,,DERIV) 1243400800003 STATUS (SPSDD,12434009)Renormalized by Leonard, HW-62727(1959)1243400800004 (DEP,12434007) From measurement at 0.10 eV and shape 1243400800005 of fission curve. 1243400800006 HISTORY (19860828A) Monitor added. 1243400800007 (20140528A) SD: SF9=DERIV in REACTION code. MONITOR 1243400800008 deleted. 1243400800009 ENDBIB 7 0 1243400800010 NOCOMMON 0 0 1243400800011 DATA 2 1 1243400800012 EN DATA 1243400800013 MEV B 1243400800014 2.53 -08 905. 1243400800015 ENDDATA 3 0 1243400800016 ENDSUBENT 15 0 1243400899999 SUBENT 12434009 20140528 14011243400900001 BIB 3 5 1243400900002 REACTION (94-PU-241(N,F),,SIG,,,DERIV) 1243400900003 STATUS (DEP,12434007) From measurement at 0.10 eV and 1243400900004 shape of fission curve. 1243400900005 (COREL,12434008)Renormalized by Leonard, HE-62727(1959)1243400900006 HISTORY (20140528A) SD: SF9=DERIV in REACTION code. 1243400900007 ENDBIB 5 0 1243400900008 NOCOMMON 0 0 1243400900009 DATA 5 1 1243400900010 EN DATA DATA-ERR MONIT MONIT-ERR 1243400900011 EV B B B B 1243400900012 0.0253 941. 46. 590.8 5.4 1243400900013 ENDDATA 3 0 1243400900014 ENDSUBENT 13 0 1243400999999 ENDENTRY 9 0 1243499999999