Now showing items 1-10 of 29
Crossover From Self-Similar to Self-Affine Structures in Precolation
(Editions Physique, 1994-05-20)
We study the crossover from self-similar scaling behavior to asymptotically self-affine (anisotropic) structures. As an example, we consider bond percolation with one preferred direction. Our theory is based on a ...
Predictions of m(b)/m(tau) and m(t) in an asymptotically nonfree theory
(Amer Physical Soc, 1997-08-01)
Energies and residues of the nucleon resonances N(1535) and N(1650)
(American Physical Society, 1998-12)
We extract pole positions for the N(1535) and N(1650) resonances using two different models. The positions are determined from fits to different subsets of the existing pi N --> pi N, pi N --> eta N, and gamma p --> eta p ...
Photogeneration action spectroscopy of neutral and charged excitations in films of a ladder-type poly(para-phenylene)
(American Physical Society, 1999-04-19)
The photogeneration quantum efficiency action spectra of long-lived neutral and charged excitations in films of a ladder-type poly(para-phenylene) were measured. We found that both tripler and polaron action spectra show, ...
Photogeneration and recombination processes of neutral and charged excitations in films of a ladder-type poly(para-phenylene)
(American Physical Society, 1999-08-15)
We introduce a version of the cw photomodulation technique, measured far from the steady state, for obtaining the quantum efficiency, eta, of long-lived photoexcitations in pi-conjugated polymers. We apply this technique ...
Dispersion of a single hole in the t-J model
(American Physical Society, 1997-03-01)
The dispersion of a single hole in the t-J model obtained by the exact result of 32 sites and the results obtained by self-consistent Born approximation and the Green function Monte Carlo method can be simply derived by a ...
ACD estimation of the S-parameter revisited
(Elsevier Science Bv, 1997-05-29)
Infrared activity in the Aurivillius layered ferroelectric SrBi2Ta2O9
(American Physical Society, 1998-03-01)
Experimental studies were carried out on infrared-active phonons in the Aurivillius ferroelectric SrBi2Ta2O9 (SBT), using reflectivity measurements (down to 200 cm(-1)) and transmission measurements (down to 100 cm(-1)) ...
Raman studies of sol-gel alumina - finite-size effects in nanocrystalline ALO(OH)
(American Physical Society, 1993-12-01)
A systematic Raman-scattering investigation has been carried out on sol-gel alumina prepared by the hot-water hydrolysis and condensation of AI(OC4H9)3, the Yoldas process, as a function of process variables such as the ...
Choice of dispersion relation to calculate the QCD correction to Gamma(H->l(+)l(-))
(American Physical Soc, 1996-02-01)
We use the Operator Product Expansion (OPE) of quark vacuum polarization functions to show that the dispersion relation of Kniehl and Sirlin will yield the correct result to all orders in αs when applied to the QCD correction ...