A BGO detector for catalysis studies with positron emitters

A detector for measurement of the activity distribution of positron emitters in a catalyst reactor has been designed and built. The detector consists of two banks of each ten BGO scintillation crystals. The activity distribution is measured as a function of time and position along the reactor. The attainable position resolution along the reactor is 3 mm and the minimum sampling time for the measurement of an activity profile is 1 second. The detector has a high sensitivity and the flexibility to be used with catalyst reactors of different types and size

A BGO Detector for Positron Emission Profiling in catalysis

As part of a project to study the reaction kinetics in catalysts, a detector system has been designed and built. The detector will measure in one dimension the activity distribution of positron emitters in catalyst reactors under operational conditions as a function of time. The detector consists of two arrays of ten EGO crystals each and has the flexibility to measure with high sensitivity the activity profile in various reactor sizes; the position resolution that can be reached is 3 m

Intensity and multipolarity of low-energy components in the quasicontinuum γ-ray spectrum following α- And C12-induced reactions

Measurements of K-shell ionization yields for (α,xn) and (C12,xn) evaporation residues exclude the existence of a large M1 component in the quasicontinuum spectrum of well-deformed Dy nuclei below 500 keV. Upper intensity limits are deduced for M1, E1, and E2 components

Ion channeling for strain analysis in buried nanofilms (

The title should have been: \"Ion channeling for strain anal. in buried nanofilms

New Effects in (3-He)-Capture Reactions at IUCF Energies

This research was sponsored by the National Science Foundation Grant NSF PHY 87-1440