956 research outputs found
Deuteron properties from muonic atom spectroscopy
Leading order () finite size corrections in muonic deuterium are
evaluated within a few body formalism for the system in muonic
deuterium and found to be sensitive to the input of the deuteron wave function.
We show that this sensitivity, taken along with the precise deuteron charge
radius determined from muonic atom spectroscopy can be used to determine the
elusive deuteron D-state probability, , for a given model of the
nucleon-nucleon (NN) potential. The radius calculated with a of 4.3\% in
the chiral NN models and about 5.7\% in the high precision NN potentials is
favoured most by the data.Comment: 14 pages, 2 figure
On Quasibound N* Nuclei
The possibility for the existence of unstable bound states of the S11 nucleon
resonance N(1535) and nuclei is investigated. These quasibound states are
speculated to be closely related to the existence of the quasibound states of
the eta mesons and nuclei. Within a simple model for the N N interaction
involving a pion and eta meson exchange, N-nucleus potentials for N*-He
and N*-Mg are evaluated and found to be of a Woods-Saxon like form which
supports two to three bound states. In case of N*-He, one state bound by
only a few keV and another by 4 MeV is found. The results are however quite
sensitive to the N N and N N vertex parameters. A rough
estimate of the width of these states, based on the mean free path of the
exchanged mesons in the nuclei leads to very broad states with 80
and 110 MeV for N*-He and N*-Mg respectively.Comment: Presented at the Jagiellonian Symposium on Fundamental and Applied
Subatomic Physics, Cracow, Poland, June 2015; to be published in Acta Physica
Polonica B (2016
Analyses of quasi-isotropic composite plates under quasi-static point loads simulating low-velocity impact phenomena
In thin composite laminates, the first level of visible damage occurs in the back face and is called back face spalling. A plate-membrane coupling model, and a finite element model to analyze the large deformation behavior of eight-ply quasi-isotropic circular composite plates under impact type point loads are developed. The back face spalling phenomenon in thin composite plates is explained by using the plate-membrane coupling model and the finite element model in conjunction with the fracture mechanics principles. The experimental results verifying these models are presented. Several conclusions concerning the deformation behavior are reached and discussed in detail
Comparative Study of Methanol, Ethanol, Isopropanol, and Butanol as Motor Fuels, Either Pure or Blended with Gasoline
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