Excitons in low-dimensional materials behave mathematically as confined hydrogen atoms. An appealing unified description of confinement quantum wells or wires, etc., is found by restricting space to a fractional dimension $1<D\ensuremath{\le}3$ serving an adjustable parameter. We compute the dynamic polarizability D-dimensional excitons terms discrete and continuum oscillator strengths. Anal...

Kevin T. Engel, Hiren H. Patel, and Michael J. Ramsey-Musolf California Institute of Technology, Pasadena, California 91125, USA Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA and Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA (Received ...

Nuclear polarizability of helium isotopes in atomic transitions K. Pachucki1 and A.M. Moro2 1 Institute of Theoretical Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland 2Departamento de FAMN, Universidad de Sevilla, Apartado 1065, 41080 Sevilla, Spain Abstract We estimate the nuclear polarizability correction to atomic transition frequencies in various helium isotopes. This effect is n...

The three body correlation spectra in the collision induced light scattering by gaseous At, CH4, CF4 and SFa at 295 K are reported. The zeroth and second frequency moments are compared with calculations based on a pairwise additive triplet cluster polarizability. It is found that the experimental results may be accounted for with the use of the first order dipole-induced dipole model for the po...

The correction to the polarizability of helium due to blackbody radiation is calculated near room temperature. A precise theoretical determination of the blackbody radiation correction to the polarizability of helium is essential for dielectric gas thermometry and for the determination of the Boltzmann constant. We find that the correction, for not too high temperature, is roughly proportional ...

The molecular structure of 1-azanapthalene-8-ol was calculated by the B3LYP density functional model with 6-31G(d,p) basis set by Gaussian program. The results from natural bond orbital analysis have been analyzed in terms of the hybridization of atoms and the electronic structure of the title molecule. The stability of the molecule arising from hyper conjugative interactions, charge delocaliza...