Germanium array

The ground-based prototype consists of a crystal lens holding small cubes of diffracting germanium crystals and a 3x3 germanium array that detects the concentrated beam in the focal plane. Measured performances of the instrument at different line energies (511 keV and 662 keV) are presented and compared with Monte-Carlo simulations. The advantages of a 3x3 Ge-detector array with respect to a standard-monoblock detector have been confirmed. 

The germanium-array-lens system also provides the following advantages ... 

A germanium-nitrogen complex containing two Ge atoms disposed in an acyclic array was obtained via the formation of the intermediate germylene [(Me3Si)2N]GeCl, which was converted into a germanium(iv) adduct via an insertion reaction (Scheme 19).157... 

Nanostructured germanium structures with mesoporous channels running through them can represent a different form of framework materials with exciting physical properties. When bulk germanium is penetrated by a regular array of mesopore channels, nanosized walls can be created that can exhibit electronic and optical characteristics similar to those of discrete nanodots [33]. 

Germanium detectors provide the highest resolution for y-rays possible with reasonable efficiency, so our system is based on an array of such detectors. For cascade y rays (in prompt coincidence) an improvement in the effective resolution is possible by using double- and higher-coincidence spectra rather than singles. For this reason, and to obtain good statistics, as many detectors as close to the target as is reasonably possible is desirable (see below). 

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