ENTRY C1102 20170922 C171C110200000001 SUBENT C1102001 20170922 C171C110200100001 BIB 13 47 C110200100002 TITLE Production of 149Tb from gold by 0.2 to 0.5 GeV protonsC110200100003 AUTHOR (H.R.Heydegger,A.Van Ginneken) C110200100004 REFERENCE (J,NP/A,196,156,1972) C110200100005 #doi:10.1016/0375-9474(72)90957-8 C110200100006 INSTITUTE (1USACHI,1USANAL) C110200100007 (1USAUSA) Department of Chemistry, Calumet Campus, C110200100008 Purdue University, Hammond, Indiana 46323, U.S.A. C110200100009 FACILITY (SYNCY,1USACHI) The University of Chicago C110200100010 Synchrocyclotron. C110200100011 SAMPLE A series of three relatively thick (1 g/cm2) pure (> C110200100012 99.999%) gold targets. The targets were sandwiched C110200100013 between two gold catcher foils and wrapped in C110200100014 aluminum foil. C110200100015 DETECTOR (SIBAR) Silicon surface-barrier detector. C110200100016 METHOD (ACTIV,CHSEP,PHD) After a suitable cooling period, C110200100017 the gold targets were dissolved and a measured amount C110200100018 of 160Tb tracer was introduced to monitor chemical C110200100019 yield. The alpha-radioactivity measurements were C110200100020 performed in vacuum using a silicon surface-barrier C110200100021 detector coupled to a multichannel pulse-height C110200100022 analyzer. Analysis of the pulse-height spectra and a C110200100023 series of absorption measurements confirmed the C110200100024 emission of 4 MeV alpha-particles from each of the C110200100025 samples. Chemical yields were determined by C110200100026 comparison of the 160Tb gamma-spectra of the various C110200100027 samples with a similarly mounted sample prepared C110200100028 directly from the tracer solution. (No correction for C110200100029 160Tb produced by protons in the gold target was C110200100030 needed since this amount was negligible compared to C110200100031 the amount of tracer added.) C110200100032 ERR-ANALYS (DATA-ERR) Somewhat arbitrarily, uncertainties of +- C110200100033 40% (excluding the uncertainties due to beam energy C110200100034 dispersion) have been assigned to the present data. A C110200100035 main factor in this estimate are the uncertainties in C110200100036 the incident proton intensities. C110200100037 (ERR-1,,5.) An upper limit of about 5% on the total C110200100038 149Tb production from impurities in the gold was C110200100039 calculated from Rudstam's empirical formula C110200100040 (ERR-2,3.,4.) The contributions due to secondaries C110200100041 (including both cascade and evaporation particles) to C110200100042 196Au were estimated to be between 3 and 4% at the C110200100043 highest energy of this experiment using both C110200100044 experimental and theoretical results. C110200100045 MONITOR (79-AU-197(P,X)79-AU-196,,SIG) C110200100046 MONIT-REF (C0700001,H.P.Yule+,J,PR,118,1591,1960) C110200100047 DECAY-DATA (65-TB-149-G,4.1HR,A,4.0,0.16) C110200100048 HISTORY (20170922C) BP C110200100049 ENDBIB 47 0 C110200100050 COMMON 1 3 C110200100051 DATA-ERR C110200100052 PER-CENT C110200100053 40.0 C110200100054 ENDCOMMON 3 0 C110200100055 ENDSUBENT 54 0 C110200199999 SUBENT C1102002 20170922 C171C110200200001 BIB 2 2 C110200200002 REACTION (79-AU-197(P,X)65-TB-149-G,,SIG) C110200200003 STATUS (TABLE) Table 1, page 157. C110200200004 ENDBIB 2 0 C110200200005 NOCOMMON 0 0 C110200200006 DATA 4 3 C110200200007 EN EN-ERR DATA DATA-ERR C110200200008 MEV MEV MICRO-B MICRO-B C110200200009 218.0 14.0 0.0028 0.0011 C110200200010 384.0 21.0 0.23 0.09 C110200200011 434.0 24.0 0.84 0.34 C110200200012 ENDDATA 5 0 C110200200013 ENDSUBENT 12 0 C110200299999 ENDENTRY 2 0 C110299999999