Sophia University

About: Sophia University is a education organization based out in Tokyo, Japan. It is known for research contribution in the topics: Nonlinear system & Catalysis. The organization has 4986 authors who have published 7657 publications receiving 106567 citations. The organization is also known as: Jōchi Daigaku.

Site-selective ion production of the core-excited CH 3 F molecule probed by Auger-electron–ion coincidence measurements

Abstract: We have carried out a coincidence experiment between energy-resolved resonant Auger electrons and mass-resolved ions on ${\mathrm{CH}}_{3}\mathrm{F}$ molecules following F $1s$ and C $1s$ excitation to the lowest unoccupied C--F antibonding molecular orbital ${\ensuremath{\sigma}}_{\mathrm{CF}}^{*}$. We found a strong enhancement of the ${\mathrm{F}}^{+}$ or ${\mathrm{CH}}^{+}$ ion production in coincidence with the F $KVV$ and C $KVV$ spectator Auger electrons, respectively, in the wide binding energy range of 28--36 eV. This site-selective ion production is interpreted as a consequence of the resonant Auger emission taking place in the transient region where the C--F elongation caused by the core excitation transforms the molecular valence orbitals gradually into nonoverlapping valence orbitals of each fragment.

The QGP shear viscosity -- elusive goal or just around the corner?

Abstract: With the new viscous hydrodynamic + hadron cascade hybrid code VISHNU, a rather precise (O(25%)) extraction of the QGP shear viscosity (eta/s)_QGP from heavy-ion elliptic flow data is possible if the initial eccentricity of the collision fireball is known with <5% accuracy. At this point, eccentricities from initial state models differ by up to 20%, leading to an O(100%) uncertainty for (eta/s)_QGP. It is shown that a simultaneous comparison of elliptic and triangular flow, v_2 and v_3, puts strong constraints on initial state models and can largely eliminate the present uncertainty in (eta/s)_QGP. The variation of the differential elliptic flow v_2(p_T) for identified hadrons between RHIC and LHC energies provides additional tests of the evolution model.

On the selection of subset autoregressive time series models

Abstract: . The estimation of subset autoregressive time series models has been a difficult problem because of the large number of possible alternative models involved. However, with the advent of model selection criteria based on the maximum likelihood, subset model fitting has become feasible. Using an efficient technique for evaluating the residual variance of all possible subset models, a method is proposed for the fitting of subset autoregressive models. The application of the method is illustrated by means of real and simulated data.

Temperature dependence of ionic conductivity of crosslinked poly(propylene oxide) films dissolving lithium salts and their interfacial charge transfer resistance in contact with lithium electrodes

Abstract: Temperature Dependence of Ionic Conductivity of Crosslinked Poly(propylene oxide) Films Dissolving Lithium Salts and Their Interfacial Charge Transfer Resistance in Contact with Lithium Electrodes