ENTRY 12901 19841010 00001290100000001 SUBENT 12901001 19841010 00001290100100001 BIB 12 26 1290100100002 INSTITUTE (1USALRL) 1290100100003 REFERENCE (J,PR/C,30,823,8409) 1290100100004 AUTHOR (R.J.PRESTWOOD,D.B.CURTIS,D.J.ROKOP,D.R.NETHAWAY, 1290100100005 N.L.SMITH) 1290100100006 TITLE DETERMINATION OF THE CROSS SECTION FOR 1290100100007 TB-159(N,2N)TB-158 AND THE HALF-LIFE OF TB-158. 1290100100008 FACILITY LLNL RTNS-1 FACILITY 1290100100009 METHOD (ACTIV)ACTIVATION AND ISOTOPE DILUTION MASS 1290100100010 SPECTROMETRY 1290100100011 INC-SOURCE LAWRENCE LIVERMORE RTNS-1 NEUTRON GENERATOR 1290100100012 DETECTOR (GELI) 1290100100013 SAMPLE MIXTURE OF THE DRIED HYDROXIDES OF TB-159 AND TM-169. 1290100100014 ISOTOPIC COMPOSITION OF THE SAMPLES- 1290100100015 ----------PERCENT--------- 1290100100016 TB-157 TB-158 TB-159 1290100100017 SAMPLE I 48.6+-0.04 0.091+-0.002 51.3+-0.04 1290100100018 SAMPLE II 56.7 0.150 43.2 1290100100019 ERR-ANALYS (DATA-ERR) DATA UNCERTAINTY GIVEN INCLUDES- 1290100100020 2 PERCENT UNCERTAINTY IN TM-169(N,2N) 1290100100021 CROSS SECTION. 1290100100022 5 PERCENT UNCERTAINTY IN THE TB-158 1290100100023 BRANCHING RATIO. 1290100100024 4 PERCENT IN THE CALCULATION USING THE 1290100100025 MEASURED FRACTIONS CONVERTED. 1290100100026 STATUS (APRVD) R.J.PRESTWOOD, 84/10/30. 1290100100027 HISTORY (841009C) 1290100100028 ENDBIB 26 0 1290100100029 NOCOMMON 0 0 1290100100030 ENDSUBENT 29 0 1290100199999 SUBENT 12901002 19841010 00001290100200001 BIB 3 5 1290100200002 REACTION (65-TB-159(N,2N)65-TB-158,,SIG) 1290100200003 DECAY-DATA (65-TB-158-G,180.YR,DG) 11 GAMMA RAYS WITH ENERGIES 1290100200004 BETWEEN 80 AND 1187 KEV MEASURED. BRANCHING RATIOS 1290100200005 TAKEN FROM NUCLEAR DATA SHEETS(1980). 1290100200006 MONITOR (69-TM-169(N,2N)69-TM-168,,SIG) 1290100200007 ENDBIB 5 0 1290100200008 NOCOMMON 0 0 1290100200009 DATA 6 1 1290100200010 EN EN-RSL DATA DATA-ERR MONIT MONIT-ERR 1290100200011 MEV MEV B PER-CENT B B 1290100200012 14.8 0.3 1.93 7.0 1.98 0.04 1290100200013 ENDDATA 3 0 1290100200014 ENDSUBENT 13 0 1290100299999 ENDENTRY 2 0 1290199999999