Considertions in the deveopment and use of very thin diffused-junction counters suitable for ΔE/Δx detection

Thin diffused-Junction counters bave been developed suitable for use as ΔE/Δx detectors. Counters ranging in thickness from 0.0005 inch to 0.0025 inch and in area up to 1.0 inch diameter have been fabricated by a process allowing a variety of counter shapes a well as good dimensional control. Tests with the 22-Mev alpha beam of the Indiana University cyclotron indicate satisfactory ΔE/Δx detection over a range of alpha particle energies from 22 Mev to below 7 Mev. Fabrication techniques will be discussed. Some results will be presented to illustrate the application of these ΔE/Δx detectors to nuclear spectroscopy.