Kent State University

About: Kent State University is a education organization based out in Kent, Ohio, United States. It is known for research contribution in the topics: Liquid crystal & Population. The organization has 10897 authors who have published 24607 publications receiving 720309 citations. The organization is also known as: Kent State & KSU.

Argon Adsorption at 77 K as a Useful Tool for the Elucidation of Pore Connectivity in Ordered Materials with Large Cagelike Mesopores

Abstract: It is shown that argon adsorption at 77 K is convenient for the elucidation of pore connectivity in ordered materials with large cagelike mesopores and is capable of providing valuable structural information that may not be available from commonly used nitrogen adsorption at 77 K. The discussed approach is based on the phenomenon of pore blocking upon desorption. The nature of this phenomenon is that the capillary evaporation from a particular pore is retarded until either the pore develops an access to the surrounding gas through a continuous path of unfilled pores, or the lower pressure limit of hysteresis for the pore is reached. When the former of these behaviors is observed, the capillary evaporation pressure provides information about the widest continuous path of pore entrances connecting the given pore with the surrounding gas, that is, about the smallest pore entrance size along this widest path. In the case where the capillary evaporation is delayed to the lower limit of hysteresis, it is possib...

Quark-photon vertex and the pion charge radius

Abstract: The rainbow truncation of the quark Dyson-Schwinger equation is combined with the ladder Bethe-Salpeter equation for the dressed quark-photon vertex to study the low-momentum behavior of the pion electromagnetic form factor. With model gluon parameters previously fixed by the pion mass and decay constant, the pion charge radius ${r}_{\ensuremath{\pi}}$ is found to be in good agreement with the data. In this work, about half of ${r}_{\ensuremath{\pi}}^{2}$ is seen to be attributable to the presence of the $\ensuremath{\rho}$ pole in the solution of the ladder Bethe-Salpeter equation.