2,690 research outputs found
General transformation of alpha cluster model wave function to jj-coupling shell model in various 4N nuclei
The antisymmetrized quasi-cluster model (AQCM) is a method to describe a
transition from the alpha-cluster wave function to the jj-coupling shell model
wave function. In this model, the cluster-shell transition is characterized by
only two parameters; R representing the distance between alpha clusters and
Lambda describing the breaking of alpha clusters, and the contribution of the
spin-orbit interaction, very important in the jj-coupling shell model, can be
taken into account starting with the alpha cluster model wave function. In this
article we show the generality of AQCM by extending the application to heavier
region; various 4N nuclei from 4He to 52Fe. We show and compare the energy
curves for the alpha+40Ca cluster configuration calculated with and without
alpha breaking effect in 44Ti
Multi loop soliton solutions and their interactions in the Degasperis-Procesi equation
In this article, we construct loop soliton solutions and mixed soliton - loop
soliton solution for the Degasperis-Procesi equation. To explore these
solutions we adopt the procedure given by Matsuno. By appropriately modifying
the -function given in the above paper we derive these solutions. We
present the explicit form of one and two loop soliton solutions and mixed
soliton - loop soliton solutions and investigate the interaction between (i)
two loop soliton solutions in different parametric regimes and (ii) a loop
soliton with a conventional soliton in detail.Comment: Published in Physica Scripta (2012
Bright Stars from the Ancient Merger Gaia-Enceladus Visible with Binoculars
We present here a list of 25 bright stars (G < 8) that are possible members of Gaia-Enceladus, a system that merged with the Milky Way approximately 10 Gyr ago, and whose debris dominates the halo near the Sun. These stars were therefore born beyond the edges of the Milky Way and are visible with binoculars. We expect the list to be of interest for public outreach and amateur astronomers. These bright stars are also useful as standard stars for calibration and validation of analysis since very high-quality spectra can be obtained with reasonable amount of telescope time
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