1,052 research outputs found
Why do we need ‘myth-busting’ in the study of Sino–African relations?
The literature on Sino–African relations has debated whether or not China's growing presence is a threat to Western or African interests, and has come to the conclusion that China's behavior is not uniquely immoral. Many countries, including Western liberal democracies, similarly give aid to local autocrats to secure natural resources. Why, then, has so much effort been made to come to this perhaps unsurprising conclusion? We argue that the literature on Chinese foreign policy remains heavily influenced by Western states' policy interests, resulting in an impoverished debate that is primarily concerned with the idea of a China threat. In order to recover the diversity in our research on Chinese foreign policy, we argue for the need to go beyond the confines of Western strategic interests
Total reaction cross section on a deuteron target and the eclipse effect of the constituent neutron and proton
Background: Eclipse effect of the neutron and proton in a deuteron target is
essential to correctly describe high-energy deuteron scattering. The
nucleus-deuteron scattering needs information not only on the nucleus-proton
but also the nucleus-neutron interaction, for which no direct measurement of
the nucleus-neutron cross sections is available for unstable nuclei.
Purpose: We systematically evaluated the total reaction cross sections by a
deuteron target to explore the feasibility of extracting the nucleus-neutron
interaction from measurable cross sections.
Methods: High-energy nucleus-deuteron collision is described by the Glauber
model, in which the proton and neutron configuration of the deuteron is
explicitly taken into account.
Results: Our calculation reproduces available experimental total reaction
cross section data on the nucleus-deuteron scattering. The possibility of
extracting the nucleus-neutron total reaction cross section from
nucleus-deuteron and nucleus-proton total reaction cross sections is explored.
The total reaction cross sections of a nucleus by proton, neutron, and deuteron
targets can be expressed, to good accuracy, in terms of the nuclear matter
radius and neutron skin thickness. Incident-energy dependence of the total
reaction cross sections is examined.
Conclusions: The total reaction cross section on a deuteron target includes
information on both the nucleus-neutron and nucleus-proton profile functions.
Measuring the cross sections by deuteron and proton targets is a promising tool
to extract the nuclear size properties.Comment: 9 pages, 5 figures, to appear in Phys. Rev.
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