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AbstractAbstract
[en] The thermal-neutron cross-section and the resonance integral for the 174Yb(n,γ)175Yb reaction were measured by the activation method using a 55Mn monitor as single comparator. Analytical grade MnO2 and Yb2O3 powder samples with and without a cylindrical 1 mm Cd shield box were irradiated in an isotropic neutron field obtained from three 241Am-Be neutron sources. The gamma-ray spectra from the activated samples were measured with a calibrated n-type high-purity Ge detector. The experimental results were corrected for the correction factors calculated for thermal and epithermal neutron self-shielding effects, epithermal neutron spectrum shape and gamma-ray self attenuation. Thus, the thermal neutron cross-section for the 174Yb(n,γ)175Yb reaction is found to be 126.5 ± 6.6 b, relative to that of the 55Mn monitor. The resonance integral value for the 174Yb(n,γ)175Yb reaction is found to be 59.6 ± 8.5 b, at cadmium cut-off energy of a 0.55 eV. Using the measured cadmium ratios of 55Mn and 174Yb, the result for resonance integral of the 174Yb(n,γ)175Yb reaction has also been obtained relative to the reference value of the 55Mn monitor. The present results for the 174Yb(n,γ)175Yb reaction agree well only with the recent experimental ones obtained by Kafala et al. and De Corte and Simonits within uncertainty limits. However, the previously reported experimental data for the thermal neutron cross-section for this reaction are distributed between 24 and 141 b, and similarly the experimental values for the resonance integral value also show a large scatter in the range of 30-69 b
Primary Subject
Source
S0168-583X(08)00491-6; Available from http://dx.doi.org/10.1016/j.nimb.2008.03.201; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms; ISSN 0168-583X;
; CODEN NIMBEU; v. 266(11); p. 2549-2555

Country of publication
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, AMERICIUM ISOTOPES, BARYONS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, CHALCOGENIDES, DAYS LIVING RADIOISOTOPES, ELECTROMAGNETIC RADIATION, ELEMENTARY PARTICLES, ELEMENTS, EVEN-ODD NUCLEI, FERMIONS, GE SEMICONDUCTOR DETECTORS, HADRONS, HEAVY NUCLEI, INTEGRALS, INTERMEDIATE MASS NUCLEI, IONIZING RADIATIONS, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, MANGANESE COMPOUNDS, MANGANESE ISOTOPES, MEASURING INSTRUMENTS, METALS, MILLISECONDS LIVING RADIOISOTOPES, NEUTRONS, NUCLEI, NUCLEONS, ODD-EVEN NUCLEI, OXIDES, OXYGEN COMPOUNDS, RADIATION DETECTORS, RADIATIONS, RADIOISOTOPES, RARE EARTH NUCLEI, SEMICONDUCTOR DETECTORS, SPECTRA, SPONTANEOUS FISSION RADIOISOTOPES, STABLE ISOTOPES, TARGETS, TRANSITION ELEMENT COMPOUNDS, TRANSITION ELEMENTS, YEARS LIVING RADIOISOTOPES, YTTERBIUM ISOTOPES
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