Now showing items 11-20 of 178
Microcomputer control of radiochemical processes
(Elsevier, 1985-11)
A system for control of radiochemical processes has been designed and constructed. Control passes through a single 8-bit port (6522 VIA) to up to 64 on-off sensors and 64 on-off switches. The outputs are latched; they are ...
Implications of a Higgs interpretation of the [zeta](8.3)
(Elsevier, 1985)
We consider the implications if the new state seen by the Crystal Ball collaboration in radiative [Upsilon]-decay, the [zeta](8.3), is interpreted as a Higgs boson. We show that BR([zeta]-->gg)<0.06 or [zeta](8.3) ...
Fractal exciton fusion: Simulations on long-range percolation clusters
(Elsevier, 1984-12)
Computer simulations of exciton fusion on percolating clusters were performed for interaction distances N=2, 3, and 4. The data yield slopes less than those expected from superuniversality (f=2/3) at interaction distances ...
Irreducible diagrams in Landau-Ginzburg field theory
(Elsevier, 1981-10-19)
It is shown that the free energy W of a Landau-Ginzburg-Wilson field theory with O(n) symmetry may be written in terms of the generating function V of diagrams irreducible in both propagator and interaction lines. This ...
A captive solvent method for rapid radiosynthesis: Application to the synthesis of [1-11C]palmitic acid
(Elsevier, 1985-08)
A method is described for the synthesis of [1-11C]palmitic acid,in which 11CO2 is reacted with a Grignard reagent trapped within the pores of microporous polypropylene powder in a column. The free acid is liberated by ...
Feasibility of sharpening limited-angle tomography by including an orthogonal set of projections
(Elsevier, 1982-02-15)
In single photon emission nuclear medicine, computed tomography systems that employ only a limited angular range of projection data suffer from blurring in the depth (or z) direction. With simulated data, we show that ...
A monitor for gamma radiation at zero degrees from the SLC collision point
(Elsevier, 1989-05-01)
Bremsstrahlung gamma rays are emitted in a narrow forward cone while the electron and positron beams are being measured with carbon fibers at the SLC (the linear collider at the Stanford Linear Accelerator Center). Beam-beam ...
The coupling of valence shell and particle-hole degrees of freedom in a partial random phase approximation
(Elsevier, 1987-03-02)
It is well known that the random phase approximation breaks down in the absence of a substantial energy gap between occupied and unoccupied single-particle states. Particle-hole excitations are then inevitably accompanied ...
On the completeness of the analysis of third and fourth spectra of the iron group, and the spectra of early B stars
(Elsevier, 1988-04-02)
The spectroscopic analysis of normal, early B stars requires a sound atomic data base, especially for the third and fourth spectra of the iron-group elements. We review the present status of the term analyses of third and ...
Annular reflectors for an FEL resonator
(Elsevier, 1986-09-01)
A resonator configuration suitable for a high-power, annular-mode FEL is discussed. The resonator is a four-element linear resonator with grazing-incidence reflectors. Cylindrically symmetric, paraboloid grazing incidence ...