Now showing items 21-30 of 52
Single random walker on disordered lattices
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1984-09)
Random walks on square lattice percolating clusters were followed for up to 2×105 steps. The mean number of distinct sites visited 〈 (S N ⊃> gives a spectral dimension of d s = 1.30±0.03 consistent with superuniversality ...
Molecular motions and [lambda] phase transition: Raman and far-ir studies of neat and isotopic mixed hexamethylbenzene crystal
(Elsevier, 1973)
Raman and far-IR studies of hexamethylbenzene (HMB) low temperature crystalline phases (neat and isotopic mixed) are presented. The Raman phonon spectrum changes drastically during the [lambda]-phase transition. Site ...
Deformability of poly(amidoamine) dendrimers
(Springer-Verlag; EDP Sciences, Società Italiana di Fisica, and Springer-Verlag, 2004-05)
Experimental data indicates that poly(amidoamine) (PAMAM) dendrimers flatten when in contact with a substrate, i.e. they are no longer spherical, but resemble flat disks. In order to better understand the deformation ...
The diffusion-limited reaction A + A -->0 in the steady state: influence of correlations in the source
(Elsevier, 1994-03-01)
We study theoretically the kinetics of the diffusion-limited reaction + -->0 in the steady state. We consider the effect of an external source which adds correlated pairs of particles. We show that in dimensions below ...
The dynamics of phase changes in molecular clusters
(Springer-Verlag, 1993-03)
The significant advantages offered by systems of molecular clusters in the study of homogeneous nucleation are discussed. Determinations of nucleation rates in clusters can be followed experimentally in supersonic jets or ...
Comments on the reflection of electrons from standing light waves
(Elsevier, 1968-07-01)
Certain discrepancies in a recent paper purporting to describe the successful observation of an effect predicted by Kapitza and Dirac are discussed. It is concluded that the claims for success are inadequately supported ...
Diffusion-limited binary reactions: the hierarchy of nonclassical regimes for random initial conditions
(Elsevier, 1993-12-01)
We derive a hierarchy of kinetic regimes and crossover conditions for elementary A + A --> 0 and A + B --> 0 batch reactions from a nonclassical reaction--diffusion formalism that includes spatial fluctuations. This ...
On the application of group theory to molecular excitons
(Elsevier, 1975-08)
In this paper a group theoretical approach was employed for the classification and construction of molecular exciton wavefunctions for two important crystal structures (naphthalene--anthracene and benzene), utilizing the ...
Isotopic mixed crystal exciton spectra in the far infrared: Naphthalene
(Elsevier, 1980-05-01)
The far infrared vibrational exciton spectra of isotopic mixed crystals of naphthalene-h8 and d8 were studied. The two observed translational phonon modes were determined to fall into the amalgamated band limit while the ...
ESR studies of metallocene intercalated Cd2P2S6
(Elsevier, 1988-11-15)
Cd2P2S6 exhibits a layered crystal structure that may be intercalated with metallocenes. The ESR spectra of Cd2P2S6 single crystals intercalated with cobaltocene, nickelocene and chromocene have been examined over the ...