Patent ID: 6420710
Filing Date: 2002-07-16
Classification: G01T

Abstract:
Semiconductor based device for the detection of gamma radiation comprising:a semiconductor based detector with a resistivity exceeding 109 &OHgr;Â·cm, an operational preamplifier coupled to the detector, means for processing a signal or a plurality of signals or a set of data corresponding to the signal or the plurality of signals which are representative of the variation with time of a signal output by the said semiconductor based detector in response to the interaction of a &ggr; photon with the semi-conducting material, said means for processing comprising means of producing data or a signal representative of the rise time of the electronic component of the total signal output by the detector, the electronic component being a component of the signal that corresponds to the collection of electrons originating from interaction between a &ggr; photon and the semi-conducting material, and said means for processing further comprising means of producing data or a signal representative of the maximum electrical charge or the maximum electrical charge corresponding to at least part of a first data set representing the rise times of electronic components, and secondly a second data set representing the total detected charges or the charges resulting from the collection of electrons, and means of establishing a relation, or correlation, between the first and second data sets; wherein the semiconductor based device is configured such that the preamplifier is placed directly at the detector output, without a decoupling capacitor between the detector and the preamplifier, and in that the signal processing device comprises means of producing data or a signal representative of an amplitude of the electronic component of the signal, or an amplitude of the total signal.