For practical considerations improved resolution together with higher operating limits can be realized for shallow-diffused junction detectors operated in the temperature range from approximately 0°C to - 70°C. Detectors used above 50°C will usually show large amounts of deterioration of resolution. Detector noise generally governs the resolution that may be achieved. It appears that noise may arise from both surface and bulk currents, but the degree of contribution by each has yet to be determined.