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 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