The State of Israel, Atomic Energy Commission, Soreq Nuclear Research

The State of Israel, Atomic Energy Commission

State of Israel, Atomic Energy Commission Soreq Research Center

Asher Shor

Yosef Eisen

Gideon Engler

Eli Pollak

The invention provides a method for detecting gamma or X-ray radiation with a room temperature solid state detector, which comprises the selection of the detector's electron trapping parameter (&mgr;&tgr;),and/or the detector voltage V so as to tune the electron trapping to optimally compensate for the incomplete charge collection.

Room temperature solid state gamma or X-ray detectors

A method and apparatus for obtaining the planar location with sub-pixel resolution and corrected energy of a gamma or X-ray photon interacting with a room temperature solid state detector of given thickness. The detector comprises two electrodes of negative and positive polarities. One of the electrodes is common, and the other is segmented being formed with segmented readout elements. Each of the readout elements defines a pixel size. Depending on that the negative or positive electrode is segmented, respectively, negative-induces charge signals are induced on the readout elements or both a positive-induced charge signal is induced on a central readout element and negative-induced charge signals are induced on adjacent readout elements. Accordingly, respective induced-charge signals are simultaneously measured and statistically correlated on the respective readout elements with detector response templates so as to obtain a best fit template, thereby determining the photon's energy, location and depth of interaction.

Technique for obtaining sub-pixel spatial resolution and corrected

A method and a system for obtaining spectroscopic data of a single photon of a given energy that undergoes an interaction, beginning at a given point in time, with a room-temperature solid state detector of a given thickness and fitted with two electrodes, which detection is held at a given bias by a voltage applied to the electrodes. In the course of the interaction, pairs of electrons and holes are created within the solid state detector which induce charge on the electrodes; the method and system enable for determination of a current induced by the electrons, being a measurable and quite accurate parameter for deducing spectroscopic data. The electron induced current is defined as the charge induced on the electrodes due to the electrons only, divided by the time it takes the electrons to induce this charge. The mentioned time is considered equal to that of a particular portion of a signal of the complete induced charge, and both the time and the charge are determined by the method and the system.

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Jerusalem, Israel

Asher Shor