ENTRY 10148 20170615 14291014800000001 SUBENT 10148001 20170615 14291014800100001 BIB 10 33 1014800100002 TITLE Thermal Capture Cross Sections of 6Li and 10B by the 1014800100003 Pulsed Neutron Method 1014800100004 AUTHOR (J.W.Meadows,J.F.Whalen) 1014800100005 REFERENCE (C,70ANL,,129,1970) 1014800100006 (J,NSE,40,12,197004) Previous results. 1014800100007 INSTITUTE (1USAANL) 1014800100008 FACILITY (VDG,1USAANL) Van de Graaff. 1014800100009 DETECTOR (BF3) BF3 counter with 1.0 mm gold cover. 1014800100010 METHOD Pulsed neutron method. A burst of fast neutrons is 1014800100011 produced in the container (2.8 MeV proton beam on 1014800100012 thick lithium target) when it filled with water and 1014800100013 thermalized, and the decay of the thermal flux is 1014800100014 measured. The water is replaced with a solution, and 1014800100015 the measurement is repeated. The difference in the 1014800100016 decay constants is a function of the capture cross 1014800100017 section in the solute. 1014800100018 CORRECTION Corrected for background, dead time, and any 1014800100019 temperature difference between the solutions and 1014800100020 water (typically 1 degree). 1014800100021 ERR-ANALYS (ERR-T) In the final results, errors in the chemical 1014800100022 analysis are assumed to be random and errors in the 1014800100023 mass analysis are assumed to be systematic. 1014800100024 (ERR-S,,0.2) Counting statistics. 1014800100025 (ERR-1) Chemical analysis. 1014800100026 (ERR-2) Mass analysis. 1014800100027 (ERR-3) Repositioning error. 1014800100028 HISTORY (19720601C) 1014800100029 (19820527A) Converted to reaction formalism 1014800100030 (20001211A) Converted to new date formats, lower case. 1014800100031 (20071108A) BIB correction 1014800100032 (20170615A) BP: Updated entry per memo 4C-3/409. 1014800100033 Authors reevaluated all the data in 1014800100034 J,NSE,40,12,197004. 1014800100035 ENDBIB 33 0 1014800100036 COMMON 3 3 1014800100037 ERR-1 ERR-2 ERR-3 1014800100038 PER-CENT PER-CENT PER-CENT 1014800100039 0.2 0.2 0.6 1014800100040 ENDCOMMON 3 0 1014800100041 ENDSUBENT 40 0 1014800199999 SUBENT 10148002 20170615 14291014800200001 BIB 4 5 1014800200002 REACTION (5-B-10(N,ABS),,SIG) 1014800200003 SAMPLE Boron stock solutions, two samples with 10B enrichments1014800200004 of 92.41+-0.20% and 93.0+-0.2%. 1014800200005 STATUS (TABLE) Table 2, page 135 of C,70ANL,,129,1970. 1014800200006 HISTORY (20170615A) BP: Updated cross section value. 1014800200007 ENDBIB 5 0 1014800200008 NOCOMMON 0 0 1014800200009 DATA 3 1 1014800200010 EN DATA ERR-T 1014800200011 EV B B 1014800200012 0.0253 3842.0 18.0 1014800200013 ENDDATA 3 0 1014800200014 ENDSUBENT 13 0 1014800299999 SUBENT 10148003 20170615 14291014800300001 BIB 4 5 1014800300002 REACTION (3-LI-6(N,ABS),,SIG) 1014800300003 SAMPLE Lithium solutions, two samples with 6Li enrichments of 1014800300004 95.96+-0.20% and 99.13+-0.20%. 1014800300005 STATUS (TABLE) Table 1, page 134 of C,70ANL,,129,1970. 1014800300006 HISTORY (20170615A) BP: Updated cross section value. 1014800300007 ENDBIB 5 0 1014800300008 NOCOMMON 0 0 1014800300009 DATA 3 1 1014800300010 EN DATA ERR-T 1014800300011 EV B B 1014800300012 0.0253 936.0 4.0 1014800300013 ENDDATA 3 0 1014800300014 ENDSUBENT 13 0 1014800399999 ENDENTRY 3 0 1014899999999