ENTRY 23097 20090918 22172309700000001 SUBENT 23097001 20090918 22172309700100001 BIB 18 97 2309700100002 TITLE Thermal-neutron capture cross sections and resonance 2309700100003 integrals of Se-80(n,gamma) Se-81m,-81g reactions. 2309700100004 AUTHOR (S.Nakamura, K.Furutaka, H.Harada, T.Katoh) 2309700100005 INSTITUTE (2JPNJAE) S.Nakamura, K.Furutaka, H.Harada. 2309700100006 (2JPNNAG) T.Katoh . 2309700100007 REFERENCE (J,NST,45,(2),116,2008) 2309700100008 REL-REF (I,,H.Harada+,J,NST,31,173,1994) 2309700100009 Data acquisition system. 2309700100010 (R,,R.B.Firestone+,B,FIRESTONE,,1996) 8th ed. Update, 2309700100011 New York, 1998. Update of 1998 year was used. 2309700100012 Reference for nuclear data used in analysis. 2309700100013 (R,,S.F.Mughabghab,R,INDC(NDS)-440,2003) 2309700100014 Reference for nuclear data used in analysis. 2309700100015 (M,,O.Shcherbakov+,J,NST,39,548,2002) 2309700100016 Method of self-shielding coefficients determination. 2309700100017 FACILITY (REAC,2JPNYOK) Research reactor of Rikkyo University. 2309700100018 Reactor power 100 kW. 2309700100019 METHOD (ACTIV) Activation. Irradiation in rotary specimen rack2309700100020 of research reactor of Rikkyo University without Cd and2309700100021 with Cd . Cd capsule of 22 mm outer diameter, 63 mm 2309700100022 outer length, 1.0 mm thickness. 2309700100023 (SITA) Single-target irradiation 2309700100024 (GSPEC) Gamma-rays were measured for about 4 hr, 2309700100025 spectrum data were saved every 10 min. 2309700100026 DETECTOR (HPGE) Detector performance is characterized by the 2309700100027 relative efficiency of 90% to a 7.6 cm thick and 2309700100028 7.6 cm in diameter NaI(Tl) detector and an energy 2309700100029 resolution 2.1 keV full width at half-maximum at 2309700100030 1.33 MeV peak of Co-60. 2309700100031 Photopeak detection efficiencies were measured with 2309700100032 standard gamma-ray sources: Eu-152,Ba-133, Cs-137. 2309700100033 MONITOR ((MONIT1)27-CO-59(N,G)27-CO-60,,SIG) 2309700100034 ((MONIT2)79-AU-197(N,G)79-AU-198,,SIG) 2309700100035 DECAY-MON (27-CO-60,5.2714YR,DG,1173.,0.999736, 2309700100036 DG,1332.,0.999856) 2309700100037 Half-life error 0.0005 year, 2309700100038 intensities errors 0.000007 and 0.000004, respectively2309700100039 (79-AU-198,2.69517D,DG,412.,0.9558) 2309700100040 Half-life error 0.00021 day, intensity error 0.0012. 2309700100041 INC-SPECT Samples were irradiated with and without cadmium 2309700100042 shield. Because 59Co and 197Au have different sensi- 2309700100043 tivities to thermal and epithermal neutrons, monitor 2309700100044 wires allow to determine the thermal and epithermal 2309700100045 fractions of neutron flux. Thermal neutron flux at 2309700100046 irradiation position was (4.54+-0.15)*10**11 2309700100047 n/(s*cm**2). Epithermal fraction was 0.038+-0.003 . 2309700100048 SAMPLE -Monitor samples are cobalt/aluminum and gold/ 2309700100049 aluminum wires which were used to monitor neutron 2309700100050 flux at the target positions. 2309700100051 -Co/Al alloy(Co 0.46+-0.01 wt%, 0.381 mm in diameter) -2309700100052 two samples, irradiation time 6 hr, 2.941 mg without 2309700100053 Cd, 6.506 mg with Cd; 2309700100054 -Au/Al alloy (Au- 0.112+-0.001 wt%, 0.510 mm diameter)-2309700100055 4 samples, irradiation time 10 min, 16.239 mg and 2309700100056 13.99 mg without Cd, 17.229 mg and 16.384 mg with Cd. 2309700100057 -Selenium oxide SeO2 powder of 99.99% purity - 2309700100058 two samples of 5.3845 mg (5 min irradiation time 2309700100059 without Cd) and 14.336 mg (10 min irradiation time 2309700100060 with Cd), in cylindrical quartz containers of 7 mm 2309700100061 outer diameter,8 mm outer length, 1 mm thickness. 2309700100062 ANALYSIS Reaction rates were calculated from photopeak counts 2309700100063 of gamma-rays emitted from Co-60 and Au-198 to 2309700100064 determine neutron flux. 2309700100065 Cd cutoff energy of 0.5 eV was used in analysis. 2309700100066 Half life of Se-81m was obtained from 103-keV gamma-ray2309700100067 decay curve as 56.2+-0.9 min(error - mainly due to 2309700100068 statistical errors of gamma-ray yields). 2309700100069 Half-life of Se-81g was determined as 19.3+-0.3 min. 2309700100070 Cross sections were calculated from reaction rates and 2309700100071 neutron fluxes. 2309700100072 Self-shielding coefficients were estimated by method 2309700100073 described in REL-REF of O.Shcherbakov+ to be: 2309700100074 Co - 1.00; Au - 1.00(thermal energy), 0.99(epithermal);2309700100075 Se-81m - 0.994 (thermal), 0.997 (epithermal); 2309700100076 Se-81g - 0.987 (thermal), 0.994 (epithermal). 2309700100077 ASSUMED (ASSUM1,27-CO-59(N,G)27-CO-60,,RI) 2309700100078 (ASSUM2,79-AU-197(N,G)79-AU-198,,RI) 2309700100079 ERR-ANALYS (ERR-T) Total error. 2309700100080 (ERR-S) Statistical error. 2309700100081 Systematical errors: 2309700100082 (ERR-1) Error of detection efficiencies for Co-60. 2309700100083 (ERR-11,,0.001) Error of gamma-ray emission 2309700100084 probabilities for Co-60 - max 0.001%. 2309700100085 (ERR-2) Error of weight measurement for Co-60. 2309700100086 (ERR-12,,0.01) Error of half-life for Co-60- max 0.01%.2309700100087 (ERR-3) Error of detection efficiencies for Au-198. 2309700100088 (ERR-4) Error of gamma-ray emission probabilities for2309700100089 (ERR-5) Error of weight measurement for Au-198. 2309700100090 (ERR-13,,0.01) Error of half-life for Au-198- max 0.01%2309700100091 MONIT-ERR -thermal cross-sections errors : 2309700100092 0.2% for Co, 0.1% for Au. 2309700100093 ADD-RES (RRATE) Reaction rates (in 10**-11 1/sec) were measured2309700100094 without Cd, with Cd 2309700100095 Co-60 - 1.81+-0.05 0.154+-0.004 2309700100096 Au-198 - 7.45+-0.14 3.20+-0.06 2309700100097 CORRECTION For dead time. 2309700100098 HISTORY (20090818C) M.M. 2309700100099 ENDBIB 97 0 2309700100100 COMMON 14 9 2309700100101 MONIT1 MONIT1-ERR MONIT2 MONIT2-ERR ASSUM1 ASSUM1-ERR 2309700100102 ASSUM2 ASSUM2-ERR ERR-S ERR-1 ERR-2 ERR-3 2309700100103 ERR-4 ERR-5 2309700100104 B B B B B B 2309700100105 B B PER-CENT PER-CENT PER-CENT PER-CENT 2309700100106 PER-CENT PER-CENT 2309700100107 37.18 0.06 98.65 0.09 75.9 2.0 2309700100108 1550. 28. 1. 2.0 2.2 2.0 2309700100109 0.13 0.9 2309700100110 ENDCOMMON 9 0 2309700100111 ENDSUBENT 110 0 2309700199999 SUBENT 23097002 20090918 22172309700200001 BIB 5 14 2309700200002 REACTION (34-SE-80(N,G)34-SE-81-M,,SIG,,MXW) 2309700200003 DECAY-DATA (34-SE-81-M,56.2MIN,DG,103.,0.130,DG,276.,0.00051) 2309700200004 Half-life was defined experimentally in this work. 2309700200005 Errors of intensities 0.003 and 0.00024, respectively.2309700200006 ADD-RES (RRATE) Reaction rates (in 10**-13 1/sec)were measured:2309700200007 0.289+-0.010 without Cd, 0.038+-0.001 with Cd. 2309700200008 ERR-ANALYS (ERR-6) Error of detection efficiencies for Se-81m. 2309700200009 (ERR-7) Error of gamma-ray emission probabilities for2309700200010 Se-81m. 2309700200011 (ERR-8) Error of weight measurement for Se-81m. 2309700200012 (ERR-9) Error of half-life for SE-81m. 2309700200013 (ERR-10) Error of neutron flux measurement for Se-81m.2309700200014 STATUS (DEP,22834002) 2309700200015 (TABLE) Table 6 of J,NST,45,(2),116,2008. 2309700200016 ENDBIB 14 0 2309700200017 COMMON 5 3 2309700200018 ERR-6 ERR-7 ERR-8 ERR-9 ERR-10 2309700200019 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2309700200020 2.0 2.3 1.0 1.4 3.0 2309700200021 ENDCOMMON 3 0 2309700200022 DATA 3 1 2309700200023 EN DATA ERR-T 2309700200024 EV B B 2309700200025 2.53E-02 0.057 0.003 2309700200026 ENDDATA 3 0 2309700200027 ENDSUBENT 26 0 2309700299999 SUBENT 23097003 20090918 22172309700300001 BIB 4 12 2309700300002 REACTION (34-SE-80(N,G)34-SE-81-M,,RI) 2309700300003 DECAY-DATA (34-SE-81-M,56.2MIN,DG,103.,0.130,DG,276.,0.00051) 2309700300004 Half-life was defined experimentally in this work. 2309700300005 Errors of intensities 0.003 and 0.00024, respectively.2309700300006 ERR-ANALYS (ERR-6) Error of detection efficiencies for Se-81m. 2309700300007 (ERR-7) Error of gamma-ray emission probabilities for2309700300008 Se-81m. 2309700300009 (ERR-8) Error of weight measurement for Se-81m. 2309700300010 (ERR-9) Error of half-life for SE-81m. 2309700300011 (ERR-10) Error of neutron flux measurement for Se-81m.2309700300012 STATUS (DEP,22834003) 2309700300013 (TABLE) Table 6 of J,NST,45,(2),116,2008. 2309700300014 ENDBIB 12 0 2309700300015 COMMON 5 3 2309700300016 ERR-6 ERR-7 ERR-8 ERR-9 ERR-10 2309700300017 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2309700300018 2.0 2.3 1.0 1.4 3.0 2309700300019 ENDCOMMON 3 0 2309700300020 DATA 3 1 2309700300021 EN-MIN DATA ERR-T 2309700300022 EV B B 2309700300023 0.5 0.186 0.014 2309700300024 ENDDATA 3 0 2309700300025 ENDSUBENT 24 0 2309700399999 SUBENT 23097004 20090918 22172309700400001 BIB 5 16 2309700400002 REACTION (34-SE-80(N,G)34-SE-81-G,,SIG,,MXW) 2309700400003 DECAY-DATA (34-SE-81-G,19.3MIN,DG,276.,0.0067,DG,290.,0.0055, 2309700400004 DG,566.,0.0022,DG,828.,0.0028) 2309700400005 Half-life was defined experimentally in this work. 2309700400006 Errors of intensities 0.0005, 0.0006, 0.0002, 0.0003, 2309700400007 respectively. 2309700400008 ADD-RES (RRATE) Reaction rates (in 10**-13 1/sec)were measured:2309700400009 2.54 +-0.20 without Cd, 0.173+-0.014 with Cd. 2309700400010 ERR-ANALYS (ERR-6) Error of detection efficiencies for Se-81g. 2309700400011 (ERR-7) Error of gamma-ray emission probabilities for2309700400012 Se-81g. 2309700400013 (ERR-8) Error of weight measurement for Se-81g. 2309700400014 (ERR-9) Error of half-life for SE-81g. 2309700400015 (ERR-10) Error of neutron flux measurement for Se-81g.2309700400016 STATUS (DEP,22834004) 2309700400017 (TABLE) Table 6 of J,NST,45,(2),116,2008. 2309700400018 ENDBIB 16 0 2309700400019 COMMON 5 3 2309700400020 ERR-6 ERR-7 ERR-8 ERR-9 ERR-10 2309700400021 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2309700400022 2.0 7.5 1.0 1.6 3.0 2309700400023 ENDCOMMON 3 0 2309700400024 DATA 3 1 2309700400025 EN DATA ERR-T 2309700400026 EV B B 2309700400027 2.53E-02 0.536 0.046 2309700400028 ENDDATA 3 0 2309700400029 ENDSUBENT 28 0 2309700499999 SUBENT 23097005 20090918 22172309700500001 BIB 4 14 2309700500002 REACTION (34-SE-80(N,G)34-SE-81-G,,RI) 2309700500003 DECAY-DATA (34-SE-81-G,19.3MIN,DG,276.,0.0067,DG,290.,0.0055, 2309700500004 DG,566.,0.0022,DG,828.,0.0028) 2309700500005 Half-life was defined experimentally in this work. 2309700500006 Errors of intensities 0.0005, 0.0006, 0.0002, 0.0003, 2309700500007 respectively. 2309700500008 ERR-ANALYS (ERR-6) Error of detection efficiencies for Se-81g. 2309700500009 (ERR-7) Error of gamma-ray emission probabilities for2309700500010 Se-81g. 2309700500011 (ERR-8) Error of weight measurement for Se-81g. 2309700500012 (ERR-9) Error of half-life for SE-81g. 2309700500013 (ERR-10) Error of neutron flux measurement for Se-81g.2309700500014 STATUS (DEP,22834005) 2309700500015 (TABLE) Table 6 of J,NST,45,(2),116,2008. 2309700500016 ENDBIB 14 0 2309700500017 COMMON 5 3 2309700500018 ERR-6 ERR-7 ERR-8 ERR-9 ERR-10 2309700500019 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2309700500020 2.0 7.5 1.0 1.6 3.0 2309700500021 ENDCOMMON 3 0 2309700500022 DATA 3 1 2309700500023 EN-MIN DATA ERR-T 2309700500024 EV B B 2309700500025 0.5 0.867 0.102 2309700500026 ENDDATA 3 0 2309700500027 ENDSUBENT 26 0 2309700599999 SUBENT 23097006 20090918 22172309700600001 BIB 3 8 2309700600002 REACTION (34-SE-80(N,G)34-SE-81,,SIG,,MXW,DERIV) 2309700600003 REL-REF (A,,H.Pomerance,J,PR,88,412,1952) 2309700600004 (A,,M.D.Goldberg+,R,BNL-325,1966) Suppl. 2. 2309700600005 (A,,K.Shibata+,J,NST,39,1124,2002) 2309700600006 (A,,S.F.Mughabghab,R,INDC(NDS)-440,2003) 2309700600007 STATUS (TABLE) Table 6 of J,NST,45,(2),116,2008. 2309700600008 (DEP,23097002) 2309700600009 (DEP,23097004) 2309700600010 ENDBIB 8 0 2309700600011 NOCOMMON 0 0 2309700600012 DATA 3 1 2309700600013 EN-MEAN DATA ERR-T 2309700600014 EV B B 2309700600015 2.53E-02 0.593 0.046 2309700600016 ENDDATA 3 0 2309700600017 ENDSUBENT 16 0 2309700699999 SUBENT 23097007 20090918 22172309700700001 BIB 3 6 2309700700002 REACTION (34-SE-80(N,G)34-SE-81,,RI,,,DERIV) 2309700700003 REL-REF (A,,K.Shibata+,J,NST,39,1125,2002) 2309700700004 (D,,S.F.Mughabghab,R,INDC(NDS)-440,2003) 2309700700005 STATUS (TABLE) Table 6 of J,NST,45,(2),116,2008. 2309700700006 (DEP,23097003) 2309700700007 (DEP,23097005) 2309700700008 ENDBIB 6 0 2309700700009 NOCOMMON 0 0 2309700700010 DATA 3 1 2309700700011 EN-MIN DATA ERR-T 2309700700012 EV B B 2309700700013 0.5 1.05 0.10 2309700700014 ENDDATA 3 0 2309700700015 ENDSUBENT 14 0 2309700799999 SUBENT 23097008 20090918 22172309700800001 BIB 3 7 2309700800002 REACTION (34-SE-80(N,G)34-SE-81-M/T,,SIG/RAT,,,DERIV) 2309700800003 REL-REF (D,,D.J.Apers+,J,JIN,5,23,1957) 2309700800004 (D,,B.Keisch,J,PR,129,769,1963) 2309700800005 (D,,C.T.Bishop,J,NP,60,241,1964) 2309700800006 STATUS (TABLE) Table 6 of J,NST,45,(2),116,2008. 2309700800007 (DEP,23097002) 2309700800008 (DEP,23097006) 2309700800009 ENDBIB 7 0 2309700800010 NOCOMMON 0 0 2309700800011 DATA 3 1 2309700800012 EN-MEAN DATA ERR-T 2309700800013 EV NO-DIM NO-DIM 2309700800014 2.53E-02 0.096 0.009 2309700800015 ENDDATA 3 0 2309700800016 ENDSUBENT 15 0 2309700899999 ENDENTRY 8 0 2309799999999