ENTRY 14679 20210213 14811467900000001 SUBENT 14679001 20210213 14811467900100001 BIB 12 26 1467900100002 TITLE Cross sections for thermal neutron capture by 180W 1467900100003 and 184W 1467900100004 AUTHOR (K.S.Krane) 1467900100005 INSTITUTE (1USAORU) 1467900100006 REFERENCE (J,ARI,146,115,2019) 1467900100007 FACILITY (REAC,1USAORU) Measurements were performed at the 1467900100008 Oregon State University TRIGA Reactor. 1467900100009 SAMPLE Natural W sample in form of foil with thickness of 1467900100010 0.025 mm and purity of 99.85%. The foils had 1467900100011 quadratic shape with side of 5-6 mm and mass in the 1467900100012 range of 15-18 mg. 1467900100013 DETECTOR (HPGE) The gamma rays were observed with a high- 1467900100014 purity Ge detector with efficiency of 35-40% compared 1467900100015 with NaI at 1332 keV. The detector resolution was 1467900100016 typically 1.7-1.8 keV at 1332 keV. 1467900100017 METHOD (ACTIV) Activation method was used. 1467900100018 INC-SOURCE (REAC) Irradiations were performed at two sites in 1467900100019 reactor core 1467900100020 -on the perifery with with thermal flux 4.4E+12 n/cm2/s1467900100021 and epithermal flux 3.5E+11 n/cm2/s 1467900100022 -in Cd lined site with epithermal flux 1.2E+12 n/cm2/s 1467900100023 MONITOR (74-W-186(N,G)74-W-187,,SIG) 1467900100024 DECAY-MON (74-W-187,23.80HR,DG,134.,0.104, 1467900100025 DG,480.,0.266, 1467900100026 DG,686.,0.332) 1467900100027 HISTORY (20210213C) Compiled by S.H. 1467900100028 ENDBIB 26 0 1467900100029 NOCOMMON 0 0 1467900100030 ENDSUBENT 29 0 1467900199999 SUBENT 14679002 20210213 14811467900200001 BIB 5 13 1467900200002 REACTION (74-W-180(N,G)74-W-181,,SIG,,MXW) 1467900200003 DECAY-DATA (74-W-181,121.2D,DG,136.,0.000311, 1467900200004 DG,152.,0.00083) 1467900200005 ERR-ANALYS (ERR-1) Uncertainty in g-ray branching 1467900200006 (ERR-2) Uncertainty in 181W half-life 1467900200007 (ERR-3) Uncertainty in detection efficiency 1467900200008 (ERR-4) Uncertainty in neutron flux ratio 1467900200009 (ERR-5) Uncertainty in gamma ray absorption 1467900200010 (ERR-6,0.,0.1) Uncertainty in abundance 1467900200011 (ERR-T) Total uncertainty 1467900200012 ANALYSIS Cros section measured on core periphery was corrected 1467900200013 using resonance integral, measured in Cd lined site. 1467900200014 STATUS (TABLE) Data taken from text,p. 119 of the reference. 1467900200015 ENDBIB 13 0 1467900200016 NOCOMMON 0 0 1467900200017 DATA 8 1 1467900200018 EN-DUMMY DATA ERR-T ERR-1 ERR-2 ERR-3 1467900200019 ERR-4 ERR-5 1467900200020 EV B B PER-CENT PER-CENT PER-CENT 1467900200021 PER-CENT PER-CENT 1467900200022 0.0253 22.7 1.6 3.7 0.9 1. 1467900200023 4. 0.5 1467900200024 ENDDATA 6 0 1467900200025 ENDSUBENT 24 0 1467900299999 SUBENT 14679003 20210213 14811467900300001 BIB 4 5 1467900300002 REACTION (74-W-180(N,G)74-W-181,,RI) 1467900300003 DECAY-DATA (74-W-181,121.2D,DG,136.,0.000311, 1467900300004 DG,152.,0.00083) 1467900300005 ERR-ANALYS (DATA-ERR) Origin of uncertainties not described 1467900300006 STATUS (TABLE) Data taken from text,p. 118 of the reference. 1467900300007 ENDBIB 5 0 1467900300008 NOCOMMON 0 0 1467900300009 DATA 3 1 1467900300010 EN-MIN DATA DATA-ERR 1467900300011 EV B B 1467900300012 0.5 425. 38. 1467900300013 ENDDATA 3 0 1467900300014 ENDSUBENT 13 0 1467900399999 SUBENT 14679004 20210213 14811467900400001 BIB 5 12 1467900400002 REACTION (74-W-184(N,G)74-W-185,,SIG,,MXW) 1467900400003 DECAY-DATA (74-W-185-G,75.1D,DG,125.,0.000192) 1467900400004 ERR-ANALYS (ERR-1) Uncertainty in g-ray branching 1467900400005 (ERR-2) Uncertainty in 181W half-life 1467900400006 (ERR-3) Uncertainty in detection efficiency 1467900400007 (ERR-4) Uncertainty in neutron flux ratio 1467900400008 (ERR-5) Uncertainty in gamma ray absorption 1467900400009 (ERR-6,0.,0.1) Uncertainty in abundance 1467900400010 (ERR-T) Total uncertainty 1467900400011 ANALYSIS Cros section measured on core periphery was corrected 1467900400012 using resonance integral, measured in Cd lined site. 1467900400013 STATUS (TABLE) Data taken from text,p. 119 of the reference. 1467900400014 ENDBIB 12 0 1467900400015 NOCOMMON 0 0 1467900400016 DATA 8 1 1467900400017 EN-DUMMY DATA ERR-T ERR-1 ERR-2 ERR-3 1467900400018 ERR-4 ERR-5 1467900400019 EV B B PER-CENT PER-CENT PER-CENT 1467900400020 PER-CENT PER-CENT 1467900400021 0.0253 1.62 0.11 3.6 1.4 1. 1467900400022 4. 0.5 1467900400023 ENDDATA 6 0 1467900400024 ENDSUBENT 23 0 1467900499999 SUBENT 14679005 20210213 14811467900500001 BIB 4 4 1467900500002 REACTION (74-W-184(N,G)74-W-185,,RI) 1467900500003 DECAY-DATA (74-W-185-G,75.1D,DG,125.,0.000192) 1467900500004 ERR-ANALYS (DATA-ERR) Origin of uncertainties not described 1467900500005 STATUS (TABLE) Data taken from text,p. 118 of the reference. 1467900500006 ENDBIB 4 0 1467900500007 NOCOMMON 0 0 1467900500008 DATA 3 1 1467900500009 EN-MIN DATA DATA-ERR 1467900500010 EV B B 1467900500011 0.5 26.6 2.3 1467900500012 ENDDATA 3 0 1467900500013 ENDSUBENT 12 0 1467900599999 ENDENTRY 5 0 1467999999999