ENTRY 20849 20140310 22382084900000001 SUBENT 20849001 20140310 22382084900100001 BIB 15 36 2084900100002 TITLE Fission spectrum averaged cross section for the 2084900100003 231Pa(n,f) reaction 2084900100004 AUTHOR (K.Kobayashi, I.Kimura) 2084900100005 INSTITUTE (2JPNKTO) 2084900100006 REFERENCE (R,KURRI-AR-10,1,1977) 2084900100007 ((P,INDC(JAP)-37,48,1977)=(P,NEANDC(J)-51,48,1977)) 2084900100008 Same PFNS averaged cross sections given 2084900100009 FACILITY (REAC,2JPNKTO) Kyoto University Research Reactor (KUR) 2084900100010 INC-SPECT Close to fission neutron spectrum 2084900100011 SAMPLE Samples below were sealed in a quartz tube. 2084900100012 Pa: Prepared from 231Pa2O5 by chemical purification, 2084900100013 and mounted on Al (10 mm in diam). 2084900100014 The number of atoms (2.589+/-0.128)E+17 was 2084900100015 determined by photopeak counts of 290 keV gamma 2084900100016 ray (3.25E+4 years). 2084900100017 Np: Prepared from 237NpO2 by chemical purification to 2084900100018 exclude 239Pu and 238Pu-241Am. 2084900100019 The number of atoms (1.112+/-0.046)E+18 was 2084900100020 determined by photopeak of 233Pa, which was 2084900100021 produced by alpha-decay and in equilibrium with 2084900100022 237Np. 2084900100023 DETECTOR (GELI) 30 cc Ge(Li) detector 2084900100024 MONITOR (93-NP-237(N,F),,SIG,,FIS) 2084900100025 ASSUMED (ASSUM1,93-NP-237(N,F)56-BA-140,CUM,FY) 2084900100026 (ASSUM2,91-PA-231(N,F)56-BA-140,CUM,FY) 2084900100027 REL-REF (R,,J.Kemmer+,J,RCA,13,181,1970) 231Pa(n,f)140Ba yield 2084900100028 DECAY-DATA (57-LA-140,,DG,1600.) 2084900100029 MONIT-REF (,B.A.Magurno,R,BNL-NCS-50446,1975) 2084900100030 1975 ENDF/B-IV Dosimetry File 2084900100031 STATUS (TABLE) Table 1 of Ann.Rep.RRI Kyoto.Univ.Vol.10(1977)12084900100032 (APRVD) Approved by Katsuhei Kobayashi (2014-03-11) 2084900100033 HISTORY (19790319C) 2084900100034 (19790511E) 2084900100035 (20140310A) On. REFERENCE: KURRI-AR-10 added. 2084900100036 BIB updated in all Subents. EN-DUMMY -> KT-DUMMY 2084900100037 according to MEMO CP-D/776. 2084900100038 ENDBIB 36 0 2084900100039 COMMON 2 3 2084900100040 ASSUM1 ASSUM2 2084900100041 PC/FIS PC/FIS 2084900100042 5.93 6.98 2084900100043 ENDCOMMON 3 0 2084900100044 ENDSUBENT 43 0 2084900199999 SUBENT 20849002 20140310 22382084900200001 BIB 5 21 2084900200002 REACTION (91-PA-231(N,F),,SIG,,FIS) fission plate neutrons 2084900200003 INC-SOURCE Fission plate (90% enriched uranium) installed at 2084900200004 the heavy water thermal neutron facility of KUR 2084900200005 REL-REF (I,,K.Kanda+,R,KURRI-TR-96,1972) 2084900200006 Fission plate is described. 2084900200007 METHOD (ACTIV) Irradiated for 60 hours (~1E+9 n/cm2/sec) 2084900200008 ERR-ANALYS (ERR-T) Total uncertainty (6.3%)2084900200009 (MONIT-ERR) 237Np(n,f) cross section reference (2%)2084900200010 (ERR-1) 237Np(n,f)140Ba reaction rate (2%)2084900200011 (ERR-2) 231Pa(n,f)140Ba reaction rate (1%)2084900200012 (ASSUM1-ERR)237Np(n,f)140Ba fission yield reference(3%)2084900200013 (ASSUM2-ERR)231Pa(n,f)140Ba fission yield reference(1%)2084900200014 (ERR-3) 237Np/231Pa atom numbers ratio (3%)2084900200015 (ERR-4) Systematic errors including (3.5%)2084900200016 - uncertainty in fission neutron energy 2084900200017 spectrum shape 2084900200018 - deviation in location between 231Pa and 2084900200019 237Np samples 2084900200020 - uncertainties of half-life 2084900200021 - irradiation and cooling time 2084900200022 and so forth. 2084900200023 ENDBIB 21 0 2084900200024 COMMON 6 3 2084900200025 ERR-1 ERR-2 ASSUM1-ERR ASSUM2-ERR ERR-3 ERR-4 2084900200026 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2084900200027 2. 1. 3. 1. 3. 3.5 2084900200028 ENDCOMMON 3 0 2084900200029 DATA 5 1 2084900200030 KT-DUMMY DATA ERR-T MONIT MONIT-ERR 2084900200031 MEV MB MB MB PER-CENT 2084900200032 1.32 1087. 68. 1323. 2. 2084900200033 ENDDATA 3 0 2084900200034 ENDSUBENT 33 0 2084900299999 SUBENT 20849003 20140310 22382084900300001 BIB 5 24 2084900300002 REACTION (91-PA-231(N,F),,SIG,,FIS) core neutrons 2084900300003 INC-SOURCE Core of KUR (hydraulic conveyor tube) where the fast 2084900300004 neutron spectrum was previously shown to be close to 2084900300005 the fission spectrum 2084900300006 REL-REF (R,,I.Kimura+,J,NST,8,59,1971) 2084900300007 Neutron spectrum at core of KUR is described. 2084900300008 (R,,K.Kanda+,R,KURRI-AR-2,18,1969) 2084900300009 Neutron spectrum at core of KUR is described. 2084900300010 METHOD (ACTIV) Irradiated for two hours (~4E+13 n/cm2/sec) 2084900300011 ERR-ANALYS (ERR-T) Total uncertainty (7.2%)2084900300012 (MONIT-ERR) 237Np(n,f) cross section reference (2%)2084900300013 (ERR-1) 237Np(n,f)140Ba reaction rate (1.5%)2084900300014 (ERR-2) 231Pa(n,f)140Ba reaction rate (3.8%)2084900300015 (ASSUM1-ERR)237Np(n,f)140Ba fission yield reference(3%)2084900300016 (ASSUM2-ERR)231Pa(n,f)140Ba fission yield reference(1%)2084900300017 (ERR-3) 237Np/231Pa atom numbers ratio (3%)2084900300018 (ERR-4) Systematic errors including (3.5%)2084900300019 - uncertainty in fission neutron energy 2084900300020 spectrum shape 2084900300021 - deviation in location between 231Pa and 2084900300022 237Np samples 2084900300023 - uncertainties of half-life 2084900300024 - irradiation and cooling time 2084900300025 and so forth. 2084900300026 ENDBIB 24 0 2084900300027 COMMON 6 3 2084900300028 ERR-1 ERR-2 ASSUM1-ERR ASSUM2-ERR ERR-3 ERR-4 2084900300029 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2084900300030 1.5 3.8 3. 1. 3. 3.5 2084900300031 ENDCOMMON 3 0 2084900300032 DATA 5 1 2084900300033 KT-DUMMY DATA ERR-T MONIT MONIT-ERR 2084900300034 MEV MB MB MB PER-CENT 2084900300035 1.32 1059. 76. 1323. 2. 2084900300036 ENDDATA 3 0 2084900300037 ENDSUBENT 36 0 2084900399999 ENDENTRY 3 0 2084999999999