ENTRY 20691 20140310 22382069100000001 SUBENT 20691001 20140310 22382069100100001 BIB 13 33 2069100100002 TITLE Measurements of the cross sections for the 2069100100003 232Th(n,g)233Th and 231Pa(n,g)232Pa reactions using 2069100100004 Maxwellian thermal neutrons 2069100100005 AUTHOR (K.Kobayashi) 2069100100006 INSTITUTE (2JPNKTO) Kyoto Univ. Research Reactor Institute 2069100100007 REFERENCE (R,KURRI-AR-7,72,1974) 2069100100008 ((P,INDC(JAP)-23,40,1974)=(P,NEANDC(J)-36,40,1974)) 2069100100009 Same Maxwellian averaged cross sections given 2069100100010 FACILITY (REAC,2JPNKTO) Kyoto University Research Reactor 2069100100011 INC-SOURCE (THCOL) D2O (1.4 m) and graphite (48 cm) thermal 2069100100012 neutron column 2069100100013 INC-SPECT Extremely close to pure Maxwellian distribution 2069100100014 DETECTOR (GELI) 2 cc Ge(Li) counter 2069100100015 METHOD (ACTIV,GSPEC) Samples of known weight and the same 2069100100016 number of Au samples (3 mm diam., 50 um thick) were 2069100100017 fixed on a rotating plate, and irradiated for 2069100100018 ~60 hours. 2069100100019 CORRECTION Irradiation flux was corrected for self-shielding of 2069100100020 thermal neutron flux due to the presence of Au foil 2069100100021 (1% to 2%). 2069100100022 Flux perturbations due to the Th and Pa samples were 2069100100023 treated as negligible. 2069100100024 ERR-ANALYS (ERR-1) Standard deviation in the results obtained 2069100100025 from Th and Pa samples. (~2%) 2069100100026 (ERR-2) Uncertainty in detector efficiency (~2%) 2069100100027 (ERR-3) Standard deviation of the thermal neutron 2069100100028 fluxes (~1%) 2069100100029 STATUS (APRVD) Approved by Katsuhei Kobayashi (2014-03-11) 2069100100030 HISTORY (19761105C) JG. 2069100100031 (19771109E) 2069100100032 (19840106U) A.P.T. Japan code changed to JPN 2069100100033 (19840106E) 2069100100034 (20140310U) On. KURRI-AR-7 added. ERR-ANALYS revised. 2069100100035 ENDBIB 33 0 2069100100036 COMMON 3 3 2069100100037 ERR-1 ERR-2 ERR-3 2069100100038 PER-CENT PER-CENT PER-CENT 2069100100039 2. 2. 1. 2069100100040 ENDCOMMON 3 0 2069100100041 ENDSUBENT 40 0 2069100199999 SUBENT 20691002 20140310 22382069100200001 BIB 7 9 2069100200002 REACTION (90-TH-232(N,G)90-TH-233,,SIG,,MXW) 2069100200003 SAMPLE Thoria powder (~20 mg) with acetone mounted on a thin 2069100200004 Al foil 2069100200005 MONITOR (79-AU-197(N,G)79-AU-198,,SIG,,MXW) 2069100200006 DECAY-DATA (90-TH-233,22.3MIN) 2069100200007 (91-PA-233,27.D,DG,300.,0.44) 2069100200008 DECAY-MON (79-AU-198-G,2.7D,DG,412.,0.95) 2069100200009 STATUS (TABLE) Table 2 of Ann.Rep.RRI Kyoto.Univ.Vol.7(1974)722069100200010 HISTORY (20140310A) On. DECAY-DATA and DECAY-MON added 2069100200011 ENDBIB 9 0 2069100200012 NOCOMMON 0 0 2069100200013 DATA 4 1 2069100200014 EN-DUMMY DATA DATA-ERR MONIT 2069100200015 EV B B B 2069100200016 0.0253 7.35 0.21 98.8 2069100200017 ENDDATA 3 0 2069100200018 ENDSUBENT 17 0 2069100299999 SUBENT 20691003 20140310 22382069100300001 BIB 7 10 2069100300002 REACTION (91-PA-231(N,G)91-PA-232,,SIG,,MXW) 2069100300003 SAMPLE Mounted on thin Al foil after chemical purification. 2069100300004 Quantity of 231Pa in each sample was obtained from the 2069100300005 absolute photopeak-counts of the 290 keV gamma-rays 2069100300006 (T1/2=3.25E+4 years). 2069100300007 MONITOR (79-AU-197(N,G)79-AU-198,,SIG,,MXW) 2069100300008 DECAY-DATA (91-PA-232,1.31D,DG,971.,0.40) 2069100300009 DECAY-MON (79-AU-198-G,2.7D,DG,412.,0.95) 2069100300010 STATUS (TABLE) Table 3 of Ann.Rep.RRI Kyoto.Univ.Vol.7(1974)722069100300011 HISTORY (20140310A) On. DECAY-DATA and DECAY-MON added 2069100300012 ENDBIB 10 0 2069100300013 NOCOMMON 0 0 2069100300014 DATA 4 1 2069100300015 EN-DUMMY DATA DATA-ERR MONIT 2069100300016 EV B B B 2069100300017 0.0253 201. 6. 98.8 2069100300018 ENDDATA 3 0 2069100300019 ENDSUBENT 18 0 2069100399999 ENDENTRY 3 0 2069199999999