ENTRY 14132 20070510 13441413200000001 SUBENT 14132001 20070510 13441413200100001 BIB 12 38 1413200100002 INSTITUTE (2JPNJAE,1USAORL) 1413200100003 REFERENCE (J,NST,44,21,2007) 1413200100004 AUTHOR (S.Nakamura,H.Harada,S.Raman,P.E.Koehler) 1413200100005 TITLE Thermal Neutron Capture Cross Sections of Zirconium-91 1413200100006 and Zirconium-93 by Prompt gamma-ray Spectroscopy 1413200100007 FACILITY (REAC,1USALAS) The experiments were performed using the1413200100008 internal target facility at the 8-MW Los Alamos Omega 1413200100009 West Reactor. 1413200100010 INC-SPECT The target was positioned at the center of the graphite1413200100011 thermal column about 1.5m from the edge of the reactor1413200100012 core, where the thermal neutron flux was about 6 x1E111413200100013 n/cm2, with a Maxwellian distribution corresponding to1413200100014 a temperature of 350 K. The Cd(In) ratio was about 1413200100015 2 x 1E3. 1413200100016 SAMPLE The Zr sample weighed 114.0 +/- 0.1 mg (22.8 +/- 0.1 mg1413200100017 of 93ZrO2), and its isotopic composition is 1413200100018 Atomic percent 1413200100019 90Zr 2.29 +/- 0.05 1413200100020 91Zr 18.61 +/- 0.1 1413200100021 92Zr 18.95 +/- 0.1 1413200100022 93Zr 19.98 +/- 0.1 1413200100023 94Zr 20.50 +/- 0.1 1413200100024 96Zr 19.67 +/- 0.1 1413200100025 The largest chemical contaminants were 1.0% Mo and 1413200100026 0.3% Fe. 1413200100027 DETECTOR (GE) The gamma rays emitted in the (nth,g) reaction 1413200100028 were measured with a 26-cm3 coaxial Ge(Li) detector 1413200100029 positioned inside a 20 cm-outer diameter x 30 cm-long 1413200100030 NaI(Tl) annulus. 1413200100031 METHOD (ACTIV) 1413200100032 MONITOR A 100.0 +/- 0.1 mg sample of (CH2)n was placed at the 1413200100033 target position together with the Zr sample in the 1413200100034 thermal column. All capture cross sections obtained in1413200100035 this work are based on sigma0 = 332.6 +/- 0.7 mb 1413200100036 for 1H. 1413200100037 ((MONIT1)1-H-1(N,G)1-H-2,,SIG) 1413200100038 MONIT-REF ((MONIT1),H.Arada+,J,NSTS,2,366,2002) 1413200100039 HISTORY (20070510C) DR 1413200100040 ENDBIB 38 0 1413200100041 COMMON 3 3 1413200100042 EN-DUMMY MONIT1 MONIT1-ERR 1413200100043 EV MB MB 1413200100044 0.025 332.6 0.7 1413200100045 ENDCOMMON 3 0 1413200100046 ENDSUBENT 45 0 1413200199999 SUBENT 14132002 20070510 13441413200200001 BIB 3 3 1413200200002 REACTION (40-ZR-91(N,G)40-ZR-92,,SIG) 1413200200003 ERR-ANALYS (ERR-T) Total uncertainty 1413200200004 STATUS Data taken from text, p. 25 1413200200005 ENDBIB 3 0 1413200200006 NOCOMMON 0 0 1413200200007 DATA 2 1 1413200200008 DATA-MIN ERR-T 1413200200009 B B 1413200200010 1.30 0.04 1413200200011 ENDDATA 3 0 1413200200012 ENDSUBENT 11 0 1413200299999 SUBENT 14132003 20070510 13441413200300001 BIB 3 3 1413200300002 REACTION (40-ZR-93(N,G)40-ZR-94,,SIG) 1413200300003 ERR-ANALYS (ERR-T) Total uncertainty 1413200300004 STATUS Data taken from text, p. 25 1413200300005 ENDBIB 3 0 1413200300006 NOCOMMON 0 0 1413200300007 DATA 2 1 1413200300008 DATA-MIN ERR-T 1413200300009 B B 1413200300010 0.63 0.02 1413200300011 ENDDATA 3 0 1413200300012 ENDSUBENT 11 0 1413200399999 ENDENTRY 3 0 1413299999999