Response functions of a Si(Li) detector for 1.3–4.0 keV monochromatic photons

Abstract

The response functions of a Si(Li) detector have been measured for monochromatic photons in the energy range 1.3–4.0 keV using synchrotron radiation from a 2.5 GeV electron storage ring. The contribution of the low-energy tail, just below the Gaussian full-energy peak, changed drastically at the boundary energy of the Si-K. absorption edge. The structure of the low-energy tail and the tail-to-peak ratio can be described by introducing a new simple geometrical model. The results of a fit based on the model were excellent for all data obtained over a wide energy range.