Now showing items 51-60 of 178
Exciton Dynamics in thin wires
(Elsevier, 1987-12-01)
When are molecular wires thin enough to show one-dimensional exciton kinetics? What are the characteristics of one-dimensional kinetics? What applications are there? Cylindrical naphthalene wires (5-5000 nanometer radius) ...
Matrix representation of decay schemes
(Elsevier, 1986-01-15)
A matrix representation of the scheme of radioactive decay combines the compactness of a tabular form with the positional information of a graphical "decay scheme". The representation is particularly convenient for generation ...
Response of high resolution drift tubes to relativistic heavy ions
(Elsevier, 1985-11-15)
We report the results of various tests undertaken in a program to develop a drift tube hodoscope for a cosmic ray balloon experiment intended to search for extragalactic antimatter. Included are studies of mechanical ...
Routine synthesis of N-[11C-methyl]scopolamine by phosphite mediated reductive methylation with [11C]formaldehyde
(Elsevier, 1988)
A synthesis of [11C]scopolamine capable of clinical delivery of this agent in high specific activity is described. The precursor [11C]formaldehyde was produced by catalytic oxidation of [11C]CH3OH over metallic silver and ...
Simulations of one-dimensional and fractal luminescence kinetics
(Elsevier, 1988-02)
Exciton and electron-hole recombination reactions were simulated on one-dimensional and fractal networks. Particle distributions depend on dimensionality and electric fields. Geminate vs. non-geminate and pulsed vs. ...
Application of coded apertures in tomographic head scanning
(Elsevier, 1984-03-15)
A circular ring tomograph, designated SPRINT, is under development for single photon emission tomography of the human head. Most data to date have been gathered using a single rotating slit inside the detector ring to ...
A systematic study of the low energy effects of heavy particles in the standard model
(Elsevier, 1989-11-06)
In this approach, at any loop order, the low energy effects of a heavy Higgs boson and a heavy fermion can be summarized by an effective lagrangian. To the one-loop order, an effective lagrangian for the bosonic sector of ...
Recombination kinetics in low dimensions
(Elsevier, 1988-02)
Computer simulations predict very anomalous delayed luminescence delayed luminescence decays for low-dimensional materials. Classical kinetics theory fails because excitons, electrons and holes have no convection. The mode ...
Neutrino-counting process and its major background (e+e- --> e+e-[gamma]) at the Z0 resonance
(Elsevier, 1989-01-09)
The differential and the total cross sections for the neutrino-counting process and its major source of background, radiative Bhabha scattering (e+e- --> e+e-[gamma]), are calculated for some experimentally relevant ...
Fermions in a time-periodic SU(2) background: The eigenfunctions
(Elsevier, 1987)
Isospinor fermions are studied in the presence of a covariantly constant, time-periodic SU(2) background field. The eigenfunction spectrum is derived. Part of the modes, termed transverse, decouple from the external field. ...