ENTRY 14408 20150123 14051440800000001 SUBENT 14408001 20150123 14051440800100001 BIB 12 41 1440800100002 TITLE Neutron capture cross sections of 194Hg and the 1440800100003 decays of 195Hg 1440800100004 AUTHOR (S.F.Dorsett,K.S.Krane) 1440800100005 INSTITUTE (1USAORU) 1440800100006 REFERENCE (J,ARI,96,83,2015) 1440800100007 FACILITY (REAC,1USAORU) Experiment performed at TRIGA reactor 1440800100008 at the Oregon State University 1440800100009 SAMPLE 194Hg is radioactive nucleus with half-life of 520y. 1440800100010 The 194Hg activity was produced at the Los Alamos 1440800100011 Meson Physics Facility by 800-MeV proton spallation 1440800100012 reactions on a Pb target and was obtained in the form 1440800100013 of HNO3 solution after the Hg activity was separated 1440800100014 by ion exchange. The proton irradiation was done in 1440800100015 the early 1980s and the separation in 1996, so there 1440800100016 should be no activities present in the sample with 1440800100017 half-lives less than a few years. The specific 1440800100018 activity of the 194Hg was approximately 1 mu-Ci/ml. 1440800100019 Samples for neutron irradiation were prepared either 1440800100020 in the liquid form or dried on aluminum foil and 1440800100021 typically amounted to 0.1 - 0.2 mu-Ci of the 194Hg 1440800100022 activity. 1440800100023 DETECTOR (GE) The gamma rays were observed with high- 1440800100024 resolution Ge detectors (efficiency 35-40% compared 1440800100025 with NaI at 1332 keV, resolution 1.68 keV at 1332 keV) 1440800100026 METHOD (ACTIV) 1440800100027 INC-SOURCE (REAC) Several locations in reactor were used for 1440800100028 samples iradiations, these included 1440800100029 - central core(nominal thermal and epithermal flux 1440800100030 respectively 1.0E+13 and 3.0E+11 n/cm2/s 1440800100031 -Cd-lined central core(0 and 1.2E+12 n/cm2/s) 1440800100032 -thermal column (6.4E+10 and 1.8E+8 n/cm2/s) 1440800100033 -fast pneumatic transfer system (1.0E+13 and 1440800100034 3.5E+11 n/cm2/s) 1440800100035 ERR-ANALYS (ERR-1) Uncertainty includes contributions from 1440800100036 branching ratios, detector efficiencies and flux 1440800100037 determination, added in quadrature. 1440800100038 (ERR-2) Uncertainty from uncertainty in 194Hg target 1440800100039 nucleus half life. 1440800100040 ANALYSIS Final data determined as average values of results 1440800100041 obtained for different irradiation places 1440800100042 HISTORY (20150123C) Compiled by S.H. 1440800100043 ENDBIB 41 0 1440800100044 NOCOMMON 0 0 1440800100045 ENDSUBENT 44 0 1440800199999 SUBENT 14408002 20150123 14051440800200001 BIB 5 14 1440800200002 REACTION (80-HG-194(N,G)80-HG-195-G,,SIG) 1440800200003 STATUS (TABLE) Data taken from text p. 85 of the reference 1440800200004 DECAY-DATA (80-HG-194,447.0YR) Half life of target nucleus 1440800200005 (80-HG-195-G,10.84HR, DG,180.1,0.0158, 1440800200006 DG,207.1,0.0153, 1440800200007 DG,261.8,0.0156, 1440800200008 DG,585.2,0.0200, 1440800200009 DG,599.7,0.0179, 1440800200010 DG,779.8,0.0631) 1440800200011 Decay data of 195gHg determined by author 1440800200012 MONITOR ((MONIT1)79-AU-197(N,G)79-AU-198,,SIG) 1440800200013 ((MONIT2)27-CO-59(N,G)27-CO-60,,SIG) 1440800200014 MONIT-REF ((MONIT1),S.F.Mughabghab,B,NEUT.RES,,2006) 1440800200015 ((MONIT2),S.F.Mughabghab,B,NEUT.RES,,2006) 1440800200016 ENDBIB 14 0 1440800200017 NOCOMMON 0 0 1440800200018 DATA 6 1 1440800200019 EN-DUMMY DATA ERR-1 ERR-2 MONIT1 MONIT2 1440800200020 EV B B B B B 1440800200021 0.025 877.0 75.0 55.0 98.65 37.18 1440800200022 ENDDATA 3 0 1440800200023 ENDSUBENT 22 0 1440800299999 SUBENT 14408003 20150123 14051440800300001 BIB 5 14 1440800300002 REACTION (80-HG-194(N,G)80-HG-195-G,,RI) 1440800300003 STATUS (TABLE) Data taken from text p. 85 of the reference 1440800300004 DECAY-DATA (80-HG-194,447.0YR) Half life of target nucleus 1440800300005 (80-HG-195-G,10.84HR, DG,180.1,0.0158, 1440800300006 DG,207.1,0.0153, 1440800300007 DG,261.8,0.0156, 1440800300008 DG,585.2,0.0200, 1440800300009 DG,599.7,0.0179, 1440800300010 DG,779.8,0.0631) 1440800300011 Decay data of 195gHg determined by author 1440800300012 MONITOR ((MONIT1)79-AU-197(N,G)79-AU-198,,RI) 1440800300013 ((MONIT2)27-CO-59(N,G)27-CO-60,,RI) 1440800300014 MONIT-REF ((MONIT1)V1002486,S.F.Mughabghab,B,NEUT.RES,,2006) 1440800300015 ((MONIT2)V1001217,S.F.Mughabghab,B,NEUT.RES,,2006) 1440800300016 ENDBIB 14 0 1440800300017 NOCOMMON 0 0 1440800300018 DATA 6 1 1440800300019 EN-MIN DATA ERR-1 ERR-2 MONIT1 MONIT2 1440800300020 EV B B B B B 1440800300021 0.5 10270.0 880.0 640.0 1550.0 74.0 1440800300022 ENDDATA 3 0 1440800300023 ENDSUBENT 22 0 1440800399999 SUBENT 14408004 20150123 14051440800400001 BIB 5 11 1440800400002 REACTION (80-HG-194(N,G)80-HG-195-M,,SIG) 1440800400003 STATUS (TABLE) Data taken from text p. 85 of the reference 1440800400004 DECAY-DATA (80-HG-194,447.0YR) Half life of target nucleus 1440800400005 (80-HG-195-M,41.6HR,DG,261.8,0.303, 1440800400006 DG,388.0,0.0224, 1440800400007 DG,560.3,0.0744) 1440800400008 Decay data of 195mHg determined by author 1440800400009 MONITOR ((MONIT1)79-AU-197(N,G)79-AU-198,,SIG) 1440800400010 ((MONIT2)27-CO-59(N,G)27-CO-60,,SIG) 1440800400011 MONIT-REF ((MONIT1),S.F.Mughabghab,B,NEUT.RES,,2006) 1440800400012 ((MONIT2),S.F.Mughabghab,B,NEUT.RES,,2006) 1440800400013 ENDBIB 11 0 1440800400014 NOCOMMON 0 0 1440800400015 DATA 6 1 1440800400016 EN-DUMMY DATA ERR-1 ERR-2 MONIT1 MONIT2 1440800400017 EV B B B B B 1440800400018 0.025 49.0 3.0 3.0 98.65 37.18 1440800400019 ENDDATA 3 0 1440800400020 ENDSUBENT 19 0 1440800499999 SUBENT 14408005 20150123 14051440800500001 BIB 5 11 1440800500002 REACTION (80-HG-194(N,G)80-HG-195-M,,RI) 1440800500003 STATUS (TABLE) Data taken from text p. 85 of the reference 1440800500004 DECAY-DATA (80-HG-194,447.0YR) Half life of target nucleus 1440800500005 (80-HG-195-M,41.6HR,DG,261.8,0.303, 1440800500006 DG,388.0,0.0224, 1440800500007 DG,560.3,0.0744) 1440800500008 Decay data of 195mHg determined by author 1440800500009 MONITOR ((MONIT1)79-AU-197(N,G)79-AU-198,,RI) 1440800500010 ((MONIT2)27-CO-59(N,G)27-CO-60,,RI) 1440800500011 MONIT-REF ((MONIT1)V1002486,S.F.Mughabghab,B,NEUT.RES,,2006) 1440800500012 ((MONIT2)V1001217,S.F.Mughabghab,B,NEUT.RES,,2006) 1440800500013 ENDBIB 11 0 1440800500014 NOCOMMON 0 0 1440800500015 DATA 6 1 1440800500016 EN-MIN DATA ERR-1 ERR-2 MONIT1 MONIT2 1440800500017 EV B B B B B 1440800500018 0.5 608.0 35.0 38.0 1550.0 74.0 1440800500019 ENDDATA 3 0 1440800500020 ENDSUBENT 19 0 1440800599999 ENDENTRY 5 0 1440899999999