Hamamatsu-photonics K.k.

Shizuoka University

Hamamatsu Photonix K.k.

Masanori Kinpara

Michiatsu Nakada

Yasuhiro Tomita

Yuji Shirayanagi

Shinjiro Matsui

Keitaro Hitomi

Toshiyuki Onodera

Tadaaki Hirai

Syouji Kurebayashi

Hideyuki Suzuki

Osamu Nakane

Haruhisa Kinoshita

Toshiaki Kawai

Ryotaro Ishikawa

The present disclosure relates to a radiation detector that is capable of preventing deterioration in an SN ratio of a read-out signal. The radiation detector includes a TlBr crystalline body, and a first electrode and a second electrode that have been provided on respective electrode formation surfaces. At least one of the first electrode and the second electrode includes a first layer and a second layer. The first layer formed on the electrode formation surface contains metallic thallium, or a first alloy of metallic thallium and another metal. The second layer on the first layer contains an alloy of a first metal and a second metal. A diffusion coefficient of metallic thallium to a layer comprised of the alloy of the first metal and the second metal is smaller than a diffusion coefficient of metallic thallium to a layer comprised of the second metal.

Radiation detector, detector module, and radiation detector production method

The present embodiment relates to a radiation detector having a structure enabling suppression of polarization in a thallium bromide crystalline body and suppression of corrosion of an electrode in the air. The radiation detector comprises a first electrode, a second electrode, and a thallium bromide crystalline body provided between the first and second electrodes. One of the first and the second electrodes includes an alloy layer and a low-resistance metal layer provide on the alloy layer. The alloy layer is comprised of an alloy of metallic thallium and another metal different from the metallic thallium. The low-resistance metal layer has a resistance value lower than a resistance value of the alloy layer and is electrically connected to a pad on a readout circuit while the radiation detector is mounted on the readout circuit.

Radiation detector

A radiation detector has a structure enabling suppression of polarization in a thallium bromide crystalline body and suppression of corrosion of an electrode in the air. The radiation detector comprises a first electrode, a second electrode, and a thallium bromide crystalline body provided between the first and second electrodes. At least one of the first electrode and the second electrode includes an alloy layer. The alloy layer is comprised of an alloy of metallic thallium and another metal different from the metallic thallium.

Radiation detector having an alloyed electrode

A radiation detector includes a signal readout substrate. The signal readout substrate is constructed by arranging pixel units having pixel electrodes in a two-dimensional matrix form on a front surface of a substrate. On a front surface of the signal readout substrate, formed is a photoconductive layer having crystallinity. On a front surface of the photoconductive layer, formed is a contact assistance layer having conductivity. On a front surface of the contact assistance layer, formed is a common electrode. A surface area per unit region of the front surface of the contact assistance layer is smaller than a surface area per unit region of the front surface of the photoconductive layer. In addition, the contact assistance layer is formed so as to include the common electrode and so as to be included in the front surface of the photoconductive layer when viewed from the front.

A sound output portion, a power supply switch, and a power supply portion, which are provided at a detachable portion A of a manipulation gripare configured to be detachable from a main body portion B of the manipulation grip. Accordingly, upon sterilization using a sterilizing gas such as an EOG, the sound output portion, the power supply switch, and the power supply portioncan be removed on a detachable portion A basis. This in turn allows for using a sterilizing gas such as EOG to sterilize the radiation detector except the sound output portion, the power supply switch, and the power supply portion, thereby preventing damage caused by a negative pressure in the sound output portion

When the distal end of a radiation detection probe () is directed toward a place to be measured, pointer light emitted by a light-emitting device () sequentially passes through a transmission window (C) of a radiation detection element () and a projection window (E) of a probe cover () to be emitted onto the place to be measured. This pointer light clearly indicates the place as a bright spot. The radiation from the place passes through the distal end of the probe cover () to be collimated by a radiation-introducing window (A) of a side shield (), and then enters the radiation detection element (). The dose of the radiation is detected in this way.

A radiation detector having a head and a main body. The head has a probe and a first articulation. The probe contains a radiation detection element, and is movable due to the first articulation. Separately from the first articulation, a second articulation is provided on the main body or the head or therebetween. Accordingly, the radiation detector can move in a different way that allowed for by the first articulation. Combining the motion by the first articulation with the motion by the second articulation increases flexibility of handling the radiation detector. Hence the radiation detector has improved ease of operation.

A radiation detector has a main body (), and a radiation detection probe () detachably attached to the distal end of the main body (). The probe () includes a detection unit () accommodating a radiation detection element (), a cap-shaped shield member () mounted to the detection unit () so as to cover the distal end of the detection unit (), and a probe cover () accommodating the detection unit () and the shield member (). A connector () onto which the probe () is adapted to be screwed is provided on the distal end of the main body (). A collimator (A) for collimating incident radiation is provided on the distal end of the shield member ().

Growing community of inventors

Hamamatsu, Japan

Masanori Kinpara