1,671 research outputs found
Local magnetism of isolated Mo atoms at substitutional and interstitial sites in Yb metal : Experiment and Theory
Using TDPAD experiment and local spin density calculations, we have observed
large 4d moments on isolated Mo atoms at substitutional and octahedral
interstitial lattice sites in Yb metal, showing Curie-Weiss local
susceptibility and Korringa like spin relaxation rate. As a surprising feature,
despite strong hybridization with the Yb neighbours, interstitial Mo atoms show
high moment stability with small Kondo temperature. While, magnetism of Mo, at
substitutional site is consistent with Kondo type antiferromagnetic d-sp
exchange interaction, we suggest that moment stability at the interstitial site
is strongly influenced by ferromagnetic polarization of Yb-4f5d band electrons.Comment: 4 pages, 4 figure
New limit for the half-life of double beta decay of Zr to the first excited state of Mo
Neutrinoless Double Beta Decay is a phenomenon of fundamental interest in
particle physics. The decay rates of double beta decay transitions to the
excited states can provide input for Nuclear Transition Matrix Element
calculations for the relevant two neutrino double beta decay process. It can be
useful as supplementary information for the calculation of Nuclear Transition
Matrix Element for the neutrinoless double beta decay process. In the present
work, double beta decay of Zr to the excited state of
Mo at 871.1 keV is studied using a low background 230 cm HPGe
detector. No evidence of this decay was found with a 232 g.y exposure of
natural Zirconium. The lower half-life limit obtained for the double beta decay
of to the excited state of is y at 90% C.L., an improvement by a factor of
4 over the existing experimental limit at 90\% C.L. The sensitivity is
estimated to be y at 90% C.L. using
the Feldman-Cousins method.Comment: 11 pages, 7 figures, Accepted in Eur. Phys. J.
Building Mutual Understanding for Effective Development
In recent years a number of countries, referred to collectively as the rising powers, have achieved rapid economic growth and increased political influence. In many cases their experience challenges received wisdom on inclusive development. Research funded by traditional development donors has tended to focus on their own aid recipients. Policy analysts in the rising powers have faced several challenges in generating systematic learning from their countries’ rapidly changing development experiences. This has created a knowledge-sharing gap. The IDS Rising Powers in International Development programme invited highly experienced policymakers and analysts to review important development experiences from their countries, as Senior International Associates, creating new opportunities for mutual learning.UK Department for International Developmen
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