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

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

Yosef Eisen

Asher Shor

Giora Keinan

Chaim Gilat

Gideon Engler

Drora Kedem

Emanuel Yellin

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 light weight gamma-camera head and assemblies and kits which embody it. The gamma-camera head has a detector assembly which includes an array of room temperature, solid state spectroscopy grade detectors each associated with a collimator and preamplifier, which detectors and associated collimators and preamplifiers are arranged in parallel rows extending in a first direction and suitably spaced from each other in a second direction normal to the first direction, each of the parallel detector rows holding a plurality of detectors. The head may optionally have an electric motor for moving the detector in the second direction and optionally also in the first direction, either stepwise or continuously.

Light weight-camera head and-camera assemblies containing it

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.

Method and system for obtaining x-ray single photon spectroscopic data

A light weight gamma camera head and assemblies and kits which embody it. The gamma camera head has a detector assembly which includes an array of room temperature, solid state spectroscopy grade detectors each associated with a collimator and preamplifier, which detectors and associated collimators and preamplifiers are arranged in parallel rows extending in a first direction and suitably spaced from each other in a second direction normal to said first direction, each of the parallel detector rows holding a plurality of detectors. The head further has electric motor means for moving the detector means in the second direction and optionally also in the first direction, either stepwise or continuously.

Light weight .gamma.-camera head and .gamma.-camera assemblies

Method and apparatus for the fast inspection of objects for the detection of elementary or compounded metals of the kind that are capable of producing with impinging X-radiation within the range of 60-160 KeV a detectable photoelectric interaction. A 110-160 KeV X-ray source is used in association with collimating and filtering apparatus, capable of generating a collimated X-ray beam consisting of repeating cycles comprising each one energy bin having a flux centred around the K-edge energy of the target metal and, if desired, comprising additionl energy bins. There is also provided a linear array of solid state, spectroscopy grade detectors. Objects to be searched for these metals are scanned by moving them across the beam at a location intermediary between the X-ray source and the detector, at a speed so selected that during each of the predetermined pixels the full energy range of the said cycle impinges a full cross-section of an inspected object without any mutual dislocation between said X-ray source and linear array of solid state, spectroscopy grade detectors. For each pixel the intensity of transmitted radiation of selected bands is recorded and the ratios of the transmitted radiation in these bands is determined. The results are processed to an image of any detected article.

Growing community of inventors

Rishon LeZion, Israel

Yosef Eisen