ENTRY 22989 20130523 22362298900000001 SUBENT 22989001 20130523 22362298900100001 BIB 14 33 2298900100002 TITLE Measurement of thermal neutron cross section and 2298900100003 resonance integral for the 170Er(n,g)171Er reaction 2298900100004 by using a 55Mn monitor 2298900100005 AUTHOR (H.Yucel, M.G.Budak, M.Karadag) 2298900100006 INSTITUTE (2TUKTUK) Turkish Atomic Energy Authority (TAEK), 2298900100007 Tandogan-Ankara 2298900100008 (2TUKGZU) 2298900100009 REFERENCE (J,PR/C,76,034610,2007) 2298900100010 INC-SOURCE (AM-BE) 241Am-Be source 2298900100011 INC-SPECT thermal flux=(1.5+/-0.2)E+04 neutrons/cm2/s, 2298900100012 epithermal flux=(1.4+/-0.1)E+03 neutrons/cm2/s, 2298900100013 epithermal spectrum shape factor alpha=0.083+/-0.016 2298900100014 REL-REF (N,,H.Yucel+,J,ANE,31,681,2004) 2298900100015 Description on Am-Be neutron irradiator and 2298900100016 determination of epithermal spectrum shape factor 2298900100017 SAMPLE Cd filter: Cylinder box with 1 mm thick, 10 mm diam., 2298900100018 20 mm height. 2298900100019 MnO2 and Er2O3 powders (analytical grade) filled in 2298900100020 polystyrene tubes with 1 mm wall thick and 2298900100021 6.5 mm internal diam. 2298900100022 Five samples for Cd-covered irradiation, and five 2298900100023 samples for bare irradiation. 2298900100024 METHOD (ACTIV) Irradiated for 3 to 5 half-lives, cooling time 2298900100025 chosen to minimize dead time losses and eliminate the 2298900100026 possible contribution of 843.8 keV gamma-ray from 27Mg2298900100027 (9.45 min) to the 846.7 keV peak of 56Mn 2298900100028 (GSPEC) Counted for 15 to 45 hrs (171Er), for 2.5 to 2298900100029 10 hrs (56Mn) 2298900100030 ANALYSIS Westcott factor g=1 assumed for both Er and Mn 2298900100031 DECAY-DATA (68-ER-171,7.516HR,DG,308.291,0.64) 2298900100032 DECAY-MON (25-MN-56,2.5789HR,DG,846.754,0.989) 2298900100033 STATUS (APRVD) Haluk Yucel (2013-05-24) 2298900100034 HISTORY (20130523C) On 2298900100035 ENDBIB 33 0 2298900100036 NOCOMMON 0 0 2298900100037 ENDSUBENT 36 0 2298900199999 SUBENT 22989002 20130523 22362298900200001 BIB 4 19 2298900200002 REACTION (68-ER-170(N,G)68-ER-171,,SIG) 2298900200003 MONITOR (25-MN-55(N,G)25-MN-56,,SIG) 2298900200004 ERR-ANALYS (ERR-T) Total uncertainty (5.4% for Er, 4.2% for Mn) 2298900200005 (ERR-1) Counting statistics for Er (0.83%) 2298900200006 (ERR-2) Counting statistics for Mn (0.39%) 2298900200007 (ERR-3) Detection efficiency for Er (2.5%) 2298900200008 (ERR-4) Detection efficiency for Mn (2.8%) 2298900200009 (ERR-5) Sample mass for Er (0.01%) 2298900200010 (ERR-6) Sample mass for Mn (0.01%) 2298900200011 (ERR-7) Half-life for Er (0.03%) 2298900200012 (ERR-8) Half-life for Mn (0.004%) 2298900200013 (ERR-9) Isotopic abundance for Er (0.24%) 2298900200014 (ERR-10) Gamma-ray intensity for Er (4.7%) 2298900200015 (ERR-11) Gamma-ray intensity for Mn (3.0%) 2298900200016 (ERR-12) Thermal neutron self-shielding for Er (0.5%) 2298900200017 (ERR-13) Thermal neutron self-shielding for Mn (0.1%) 2298900200018 (ERR-14) Cadmium transmission factor for Er (0.1%) 2298900200019 (MONIT-ERR) 55Mn(n,g) thermal cross section (0.75%) 2298900200020 STATUS (TABLE) Table V of Phys.Rev.C76(2007)034610 2298900200021 ENDBIB 19 0 2298900200022 COMMON 14 9 2298900200023 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 2298900200024 ERR-7 ERR-8 ERR-9 ERR-10 ERR-11 ERR-12 2298900200025 ERR-13 ERR-14 2298900200026 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2298900200027 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2298900200028 PER-CENT PER-CENT 2298900200029 0.83 0.39 2.5 2.8 0.01 0.01 2298900200030 0.03 0.004 0.24 4.7 3.0 0.5 2298900200031 0.1 0.1 2298900200032 ENDCOMMON 9 0 2298900200033 DATA 5 1 2298900200034 EN DATA ERR-T MONIT MONIT-ERR 2298900200035 EV B B B B 2298900200036 0.0253 8.00 0.56 13.3 0.1 2298900200037 ENDDATA 3 0 2298900200038 ENDSUBENT 37 0 2298900299999 SUBENT 22989003 20130523 22362298900300001 BIB 4 21 2298900300002 REACTION (68-ER-170(N,G)68-ER-171,,RI) 2298900300003 MONITOR (25-MN-55(N,G)25-MN-56,,RI) 2298900300004 ERR-ANALYS Sensitivities to uncertainty in the resonance integral 2298900300005 are also available in the article. The partial 2298900300006 uncertainty in the resonance integral for each 2298900300007 source of uncertainty is listed below: 2298900300008 (ERR-T) Total uncertainty (8.8%)2298900300009 (ERR-1) alpha-shape parameter (1.2%)2298900300010 (ERR-2) Cd cut-off energy (0.45%)2298900300011 (ERR-3) Cd ratio for Mn (1.8%)2298900300012 (ERR-4) Cd ratio for Er (2.9%)2298900300013 (ERR-5) Thermal self-shielding factor for Mn (0.10%)2298900300014 (ERR-6) Thermal self-shielding factor for Er (0.50%)2298900300015 (ERR-7) Epithermal self-shielding factor for Mn(0.20%)2298900300016 (ERR-8) Epithermal self-shielding factor for Er(2.30%)2298900300017 (ERR-9) 55Mn(n,g) thermal cross section (1.2%)2298900300018 (ERR-10) 170Er(n,g) thermal cross section (6.9%)2298900300019 (ERR-11) Effective resonance energy for Mn (0.44%)2298900300020 (ERR-12) Effective resonance energy for Er (0.16%)2298900300021 (MONIT-ERR) 55Mn(n,g) resonance integral (3.3%)2298900300022 STATUS (TABLE) Table V of Phys.Rev.C76(2007)034610 2298900300023 ENDBIB 21 0 2298900300024 COMMON 12 6 2298900300025 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 2298900300026 ERR-7 ERR-8 ERR-9 ERR-10 ERR-11 ERR-12 2298900300027 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2298900300028 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2298900300029 1.2 0.45 1.8 2.9 0.10 0.50 2298900300030 0.20 2.30 1.2 6.9 0.44 0.16 2298900300031 ENDCOMMON 6 0 2298900300032 DATA 5 1 2298900300033 EN-MIN DATA ERR-T MONIT MONIT-ERR 2298900300034 EV B B B B 2298900300035 0.55 44.5 4.0 14.0 0.3 2298900300036 ENDDATA 3 0 2298900300037 ENDSUBENT 36 0 2298900399999 ENDENTRY 3 0 2298999999999