Monte-Carlo Study of Bound States in a Few-Nucleon System - Method of Continued Fractions -

We propose a new type of Monte-Carlo method which enables us to study the excited state of many-body systems.Comment: ReVTeX: 25 pages, 10 Postscript figures,2 tables, uses epsf.sty:to be published in Prog. Theor. Phys. vol.10

Microstructure and mechanical properties of hip-consolidated Rene 95 powders

The effects of heat-treatments on the microstructure of P/M Rene 95 (a nickel-based powder metal), consolidated by the hot-isostatic pressing (HIP), were examined. The microstructure of as-HIP'd specimen was characterized by highly serrated grain boundaries. Mechanical tests and microstructural observations reveal that the serrated grain boundaries improved ductility at both room and elevated temperatures by retarding crack propagation along grain boundaries

Superconducting gap of overdoped Tl2Ba2CuO6+d observed by Raman scattering

We report Raman scattering spectra for single crystals of overdoped Tl2Ba2CuO6+d (Tl-2201) at low temperatures. It was observed that the pair-breaking peaks in A1g and B1g spectra radically shift to lower energy with carrier doping. We interpret it as s-wave component mixing into d-wave, although the crystal structure is tetragonal. Since similar phenomena were observed also in YBa2Cu3Oy and Bi2Sr2CaCu2Oz, we conclude that s-wave mixing is a common property for overdoped high-Tc superconductors.Comment: 8 pages, 3 figures, proceedings of SNS200

Phenomenology of the little bang

I review recent selected developments in the theory and modeling of ultrarelativistic heavy-ion collisions. I explain why relativistic viscous hydrodynamics is now used to model the expansion of the matter formed in these collisions. I give examples of first quantitative predictions, and I discuss remaining open questions associated with the description of the freeze-out process. I argue that while the expansion process is now well understood, our knowledge of initial conditions is still poor. Recent analyses of two-particle correlations have revealed fine structures known as ridge and shoulder, which extend over a long range in rapidity. These correlations are thought to originate from initial state fluctuations, whose modeling is still crude. I discuss triangular flow, a simple mechanism recently put forward, through which fluctuations generate the observed correlation pattern.Comment: 10 pages, plenary talk at the International Nuclear Physics Conference (INPC 2010), Vancouver, Canada, July 4-9, 2010. (version 2: minor revision.

Cluster-orbital shell model approach and developments for study of neutron-rich systems

We develop an m-scheme approach of the cluster-orbital shell model (COSM). By using the Gaussian as the radial part of the basis function, components of the unbound states are correctly taken into account. We apply the m-scheme COSM to oxygen isotopes and study the energies and r.m.s.radii

Simplified modeling of cluster-shell competition in carbon isotopes

We study the cluster-shell competition in carbon isotopes. Two parameters are introduced for the 12C core to characterize the transition from a cluster state to a shell-model state as a measure of the cluster-shell competition: one expresses the relative distance between clusters and the other does the dissolution of one of the clusters. We show the energy curves as functions of these parameters. The calculation is performed by combining the simplified modeling of cluster-shell competition for the 12C core and AMD triple-S. As the neutron number increases, the - distance becomes smaller; on the contrary, the dissolution of clusters is enhanced. The origins of the anomalously small B(E2) value of 16C are discussed from cluster-shell competition point of view, and the appearance of pure cluster state around the 10 MeV region is suggested.c2007 The American Physical Societyapplication/pdfjournal articl