2,209 research outputs found
One-rank interaction kernel of the two-nucleon system for medium and high energies
A new version of the separable kernel of the nucleon-nucleon interaction in
the Bethe-Salpeter approach is presented. The phase shifts are fitted to recent
experimental data for singlet and uncoupled triplet partial waves of the
neutron-proton scattering with total angular momenta J=0,1. The results are
compared with other model calculations.Comment: 10 pages, 5 figures, 3 table
Mesh ratios for best-packing and limits of minimal energy configurations
For -point best-packing configurations on a compact metric
space , we obtain estimates for the mesh-separation ratio
, which is the quotient of the covering radius of
relative to and the minimum pairwise distance between points in
. For best-packing configurations that arise as limits of
minimal Riesz -energy configurations as , we prove that
and this bound can be attained even for the sphere.
In the particular case when N=5 on with the Euclidean metric, we
prove our main result that among the infinitely many 5-point best-packing
configurations there is a unique configuration, namely a square-base pyramid
, that is the limit (as ) of 5-point -energy
minimizing configurations. Moreover,
Study of Scintillator Strip with Wavelength Shifting Fiber and Silicon Photomultiplier
The performance of the cm plastic scintillator
strip with wavelength shifting fiber read-out by two novel photodetectors
called Silicon PhotoMultipliers (SiPMs) is discussed. The advantages of SiPM
relative to the traditional multichannel photomultiplier are shown. Light yield
and light attenuation measurements are presented. This technique can be used in
muon or calorimeter systems.Comment: 9 pages, 5 figure
Grammaticalization as one of the main language system evolution consistent patterns
The article deals with the grammaticalization as a language system pattern which enriches not only morphology but also vocabulary. Grammaticalization theory development has been described. Special attention was paid to its basic principles and mechanisms. The authors have defined the prepositional-nominal groups, designated their linguistically significant features and functioning in the modern German languageyesBelgorod State Universit
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