ENTRY 31717 20111106 31533171700000001 SUBENT 31717001 20111106 31533171700100001 BIB 14 39 3171700100002 TITLE Thermal neutron cross section determination of 3171700100003 short-to-medium lived nuclides using a 20 Ci Am-Be 3171700100004 neutron source 3171700100005 AUTHOR (S.E.Agbemava,B.J.B.Nyarko,J.J.Fletcher, 3171700100006 R.B.M.Sogbadji, E.Mensimah,M.Asamoah) 3171700100007 INSTITUTE (3GHALGN) 3171700100008 (3GHAGHA) University of Ghana, Graduate School of 3171700100009 Nuclear and Allied Science, Accra, Ghana 3171700100010 REFERENCE (J,ANE,38,1737,2011) 3171700100011 #doi:10.1016/j.anucene.2011.04.004 3171700100012 INC-SOURCE (AM-BE)20 Ci 241Am-Be isotopic neutron source, 3171700100013 moderated with water. 3171700100014 METHOD (ACTIV,CADMB) The samples were irradiated with and 3171700100015 without a Cd cover. 3171700100016 DETECTOR (HPGE) A HPGe coaxial detector with a relative 3171700100017 efficiency of 25%. The gamma- rays for all the 3171700100018 targets were counted from a distance of 1.20 cm from 3171700100019 the detector The gamma detection efficiency as a 3171700100020 function of energy was determined using a mixed 3171700100021 standard radionuclide solution containing different 3171700100022 radioactive nuclides (241Am, 109Cd, 57Co, 203Hg, 85Sr, 3171700100023 137Sr, 137Cs, 54Mn and 60C0) of known activities. 3171700100024 MONITOR (25-MN-55(N,G)25-MN-56,,SIG) 3171700100025 DECAY-MON (25-MN-56,2.58HR,DG,846.76,0.9887) 3171700100026 REL-REF (R,,,R,IAEA-TECDOC-564,1990) Reference for nuclear data3171700100027 CORRECTION Westcott factor for the monitor reaction - 1.000 3171700100028 Thermal neutron self-shielding factor for the monitor 3171700100029 reaction - 0.9253 +/- 0.007 3171700100030 ERR-ANALYS (ERR-1) Total experimental uncertainty due to monitor 3171700100031 normalization (1.81%): 3171700100032 Partial uncertainties for the monitor reaction:3171700100033 - Statistical uncertainty (1.35%) 3171700100034 - Detector efficiency (1.17%) 3171700100035 - Mass of the Mn sample (0.02%) 3171700100036 - Gamma-ray emission probability (0.3%) 3171700100037 - Thermal neutron self-shielding factor (0.1%) 3171700100038 STATUS (TABLE) Table 3 of ANE,38,1737,2011 3171700100039 (APRVD) Approved by Dr. S.E.Agbemava, 19 Nov. 2011 3171700100040 HISTORY (20111106C) 3171700100041 ENDBIB 39 0 3171700100042 COMMON 4 3 3171700100043 EN MONIT MONIT-ERR ERR-1 3171700100044 EV B B PER-CENT 3171700100045 0.0253 13.3 0.1 1.81 3171700100046 ENDCOMMON 3 0 3171700100047 ENDSUBENT 46 0 3171700199999 SUBENT 31717002 20111106 31533171700200001 BIB 5 14 3171700200002 REACTION (53-I-127(N,G)53-I-128,,SIG) 3171700200003 DECAY-DATA (53-I-128,24.99MIN,DG,442.90,0.1690) 3171700200004 SAMPLE (53-I-127,NAT=1.0) Ten parts per million standard 3171700200005 solution of iodine was used for the cross section 3171700200006 measurements. 3171700200007 CORRECTION Westcott factor - 0.999. Thermal neutron self-shielding3171700200008 factor - 0.9416 +/- 0.003. 3171700200009 ERR-ANALYS (ERR-T) Total uncertainty of the reported value. 3171700200010 Total experimental uncertainty (2.61%). 3171700200011 (ERR-S) Statistical uncertainty (0.98%) 3171700200012 (ERR-2) Detector efficiency (2.31%) 3171700200013 (ERR-3) Mass of I sample (0.02%) 3171700200014 (ERR-4) Gamma-ray emission probability (0.7%) 3171700200015 (ERR-5) Thermal neutron self-shielding factor (0.1%) 3171700200016 ENDBIB 14 0 3171700200017 NOCOMMON 0 0 3171700200018 DATA 7 1 3171700200019 DATA ERR-T ERR-S ERR-2 ERR-3 ERR-4 3171700200020 ERR-5 3171700200021 B B PER-CENT PER-CENT PER-CENT PER-CENT 3171700200022 PER-CENT 3171700200023 5.93 0.52 0.98 2.31 0.02 0.73171700200024 0.1 3171700200025 ENDDATA 6 0 3171700200026 ENDSUBENT 25 0 3171700299999 SUBENT 31717003 20111107 31533171700300001 BIB 5 16 3171700300002 REACTION (62-SM-152(N,G)62-SM-153,,SIG) 3171700300003 DECAY-DATA (62-SM-153,46.27HR,DG,103.18,0.2882) 3171700300004 SAMPLE (62-SM-152,NAT=0.2675) Ten parts per million standard 3171700300005 solution of samarium. The certified concentration of 3171700300006 the elemental samarium (Sm) in the samarium standard 3171700300007 solution was 9.94 +/- 0.03 mg/g. 3171700300008 CORRECTION Westcott factor - 1.003. Thermal neutron self-shielding3171700300009 factor - 0.9195 +/- 0.004. 3171700300010 ERR-ANALYS (ERR-T) Total uncertainty of the reported value 3171700300011 Total experimental uncertainty (3.33%). 3171700300012 (ERR-S) Statistical uncertainty (1.73%) 3171700300013 (ERR-2) Detector efficiency (2.52%) 3171700300014 (ERR-3) Mass of I sample (0.02%) 3171700300015 (ERR-4) Gamma-ray emission probability (1.30%) 3171700300016 (ERR-5) Thermal neutron self-shielding factor (0.1%) 3171700300017 (ERR-6) Half-live (0.2%) 3171700300018 ENDBIB 16 0 3171700300019 NOCOMMON 0 0 3171700300020 DATA 8 1 3171700300021 DATA ERR-T ERR-S ERR-2 ERR-3 ERR-4 3171700300022 ERR-5 ERR-6 3171700300023 B B PER-CENT PER-CENT PER-CENT PER-CENT 3171700300024 PER-CENT PER-CENT 3171700300025 207.3 9.4 1.73 2.52 0.02 1.303171700300026 0.1 0.2 3171700300027 ENDDATA 6 0 3171700300028 ENDSUBENT 27 0 3171700399999 SUBENT 31717004 20111110 31533171700400001 BIB 5 15 3171700400002 REACTION (62-SM-154(N,G)62-SM-155,,SIG) 3171700400003 DECAY-DATA (62-SM-155,22.30MIN,DG,104.35,0.7460) 3171700400004 SAMPLE (62-SM-154,NAT=0.2275) Ten parts per million standard 3171700400005 solution of samarium. The certified concentration of 3171700400006 the elemental samarium (Sm) in the samarium standard 3171700400007 solution was 9.94 +/- 0.03 mg/g. 3171700400008 CORRECTION Westcott factor - 1.000. Thermal neutron self-shielding3171700400009 factor - 0.9641 +/- 0.006. 3171700400010 ERR-ANALYS (ERR-T) Total uncertainty of the reported value 3171700400011 Total experimental uncertainty (3.45%) 3171700400012 (ERR-S) Statistical uncertainty (2.01%) 3171700400013 (ERR-2) Detector efficiency (2.79%) 3171700400014 (ERR-3) Mass of I sample (0.02%) 3171700400015 (ERR-4) Thermal neutron self-shielding factor (0.1%) 3171700400016 (ERR-5) Half-live (0.21%) 3171700400017 ENDBIB 15 0 3171700400018 NOCOMMON 0 0 3171700400019 DATA 7 1 3171700400020 DATA ERR-T ERR-S ERR-2 ERR-3 ERR-4 3171700400021 ERR-5 3171700400022 B B PER-CENT PER-CENT PER-CENT PER-CENT 3171700400023 PER-CENT 3171700400024 7.7 0.3 2.01 2.79 0.02 0.1 3171700400025 0.21 3171700400026 ENDDATA 6 0 3171700400027 ENDSUBENT 26 0 3171700499999 SUBENT 31717005 20111110 31533171700500001 BIB 5 15 3171700500002 REACTION (92-U-238(N,G)92-U-239,,SIG) 3171700500003 DECAY-DATA (92-U-239,23.47MIN,DG,74.66,0.5000) 3171700500004 SAMPLE (92-U-238,NAT=0.992742) Ten parts per million standard3171700500005 solution of uranium. The certified concentration of 3171700500006 the elemental uranium (U) in the samarium standard 3171700500007 solution was 9.993 +/- 0.017 mg/g. 3171700500008 ERR-ANALYS (ERR-T) Total uncertainty of the reported value 3171700500009 Total experimental uncertainty (2.72%) 3171700500010 (ERR-S) Statistical uncertainty (0.85%) 3171700500011 (ERR-2) Detector efficiency (2.14%) 3171700500012 (ERR-3) Mass of I sample (0.02%) 3171700500013 (ERR-4) Gamma-ray emission probability (1.45%) 3171700500014 (ERR-5) Thermal neutron self-shielding factor (0.1%) 3171700500015 CORRECTION Westcott factor - 1.002. Thermal neutron self-shielding3171700500016 factor - 0.9074 +/- 0.004. 3171700500017 ENDBIB 15 0 3171700500018 NOCOMMON 0 0 3171700500019 DATA 7 1 3171700500020 DATA ERR-T ERR-S ERR-2 ERR-3 ERR-4 3171700500021 ERR-5 3171700500022 B B PER-CENT PER-CENT PER-CENT PER-CENT 3171700500023 PER-CENT 3171700500024 2.79 0.09 0.85 2.14 0.02 1.453171700500025 0.1 3171700500026 ENDDATA 6 0 3171700500027 ENDSUBENT 26 0 3171700599999 ENDENTRY 5 0 3171799999999