12,382 research outputs found
Entire convex curvature flow in Minkowski space
In this paper, we study fully nonlinear curvature flows of noncompact
spacelike hypersurfaces in Minkowski space. We prove that if the initial
hypersurface satisfies certain conditions, then the flow exists for all time.
Moreover, we show that after rescaling the flow converges to the future
timelike hyperboloid, which is a self-expander
Neutron Density Distributions of Neutron-Rich Nuclei Studied with the Isobaric Yield Ratio Difference
The isobaric yield ratio difference (IBD) between two reactions of similar
experimental setups is found to be sensitive to nuclear density differences
between projectiles. In this article, the IBD probe is used to study the
density variation in neutron-rich Ca. By adjusting diffuseness in the
neutron density distribution, three different neutron density distributions of
Ca are obtained. The yields of fragments in the 80 MeV Ca
+ C reactions are calculated by using a modified statistical
abrasion-ablation model. It is found that the IBD results obtained from the
prefragments are sensitive to the density distribution of the projectile, while
the IBD results from the final fragments are less sensitive to the density
distribution of the projectile.Comment: 3 figure
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