Accession Number:

AD0677011

Title:

CHARGE COLLECTION EFFICIENCIES FOR LITHIUM-DRIFTED SILICON AND GERMANIUM DETECTORS IN THE X-RAY ENERGY REGION,

Descriptive Note:

Corporate Author:

STANFORD UNIV CALIF HIGH ENERGY PHYSICS LAB

Personal Author(s):

Report Date:

1968-02-01

Pagination or Media Count:

19.0

Abstract:

Theoretical calculations showing the charge collection efficiencies of GeLi and SiLi planar detectors as a function of trapping lengths and incident X-ray energies are presented. It is demonstrated that there should be an intrinsic energy dependence of the charge collection efficiency for radiation lengths comparable to the detector depletion depth. The nonlinear behavior is generally greater for unequal hole and electron trapping lengths. Experimental results confirm this in part, but surface effects appear to accentuate the effect. It is concluded that, neglecting surface effects, the nonlinearities should be eliminated if the radiation is incident in a direction perpendicular to the field. Highest charge collection efficiency, best resolution and linearity are obtained by injecting the photons through the detector side perpendicular to the field along a unique plane which is defined by the electron to hole trapping ratio. Author

Subject Categories:

  • Nuclear Instrumentation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE