8 results about "Optically stimulated luminescence" patented technology

A beryllium aluminate component may include a beryllium aluminate ceramic comprising 90 wt% or more beryllium aluminate. The ceramic may be characterized by one or more of: a thermal conductivity from 17 W / m·K to 175 W / m·K at room temperature; a bulk resistivity greater than 1 x 1015 ohm-cm at room temperature and / or greater than 1 x 109 ohm-cm at 700 ºC and / or greater than 1 x 1010 ohm-cm at 600 ºC; a coefficient of thermal expansion from 7.4 to 9.0 µm / (m·K) at room temperature; a near bioequivalence to human body tissue (Zeff) from 7.2 to 11.3; and a density of from 3.4 to 3.9 g / cc. The beryllium aluminate components may be used in pedestal assemblies, wafer pedestals, wafer chucks, integral resistance heaters, and / or components thereof, as well as for optically stimulated luminescence, thermoluminescence, radioluminescence, or dosimetry systems thereof. Processes for preparing the beryllium aluminate ceramic components are also disclosed.

The invention discloses a luminescence signal abnormity discrimination method suitable for sandstone type uranium ore light luminescence exploration, which comprises the following steps: S1, selecting a soil sample in a sandstone type uranium ore exploration area, and extracting quartz feldspar mixed minerals; s2, constructing a soil photoluminescence signal dose response curve by adopting quartz feldspar mixed minerals; s3, applying different regenerative doses Rx to the quartz feldspar mixed mineral by adopting a standard radiation radioactive source, performing infrared light excitation and blue light excitation, calculating an abnormal indication parameter LIRSL / LOSL, determining a reasonable value of the LIRSL / LOSL in the range of the regenerative doses Rx, and drawing a reasonable range screening graph of the LIRSL / LOSL value; s4, sequentially performing infrared light excitation and blue light excitation measurement on quartz feldspar mixed minerals extracted from all the soil samples to be detected in the sandstone type uranium ore exploration area to obtain LIRSL and LOSL; the LOSL is substituted into a soil photoluminescence signal dose response curve to obtain De, the De value and the LIRSL / LOSL value are substituted into the reasonable range discrimination graph, and discrimination of soil natural photoluminescence signal abnormity in sandstone type uranium mine photoluminescence exploration is achieved.

The present invention relates to a phantom for dosimetry comprising a composition comprising nanoparticle crystallites characterised by exhibiting optically stimulated luminescence properties, and wherein said crystallites are embedded in a hydrogel matrix. Furthermore the present invention relates to a dosimeter based on said phantom for measuring ionising radiation, and more particularly to a phantom for three-dimensional dosimetry via optically stimulated luminescence and corresponding method for preparation and use.

The present invention discloses an integrated sampling box for photoluminescence testing, which includes 8 sampling tubes and a sampling box outer body. Each sampling tube includes a sampling tube cover, a rubber ball, a sampling tube cutting edge, a sample tube body and a sampling tube base. The sampling box outer body includes a sampling box cover, a card slot and a sampling box base. The sampling tube cutting edge, the sample tube body and the sampling tube base are screwed together from top to bottom in sequence through screw connections. The sampling tube cutting edge, the sample tube body and the sampling tube base are passed through the card slot hole and placed on the hemispherical card hole of the thick layer of sponge in the sampling box base. The rubber ball is placed in the sampling tube cutting edge, and the sampling tube cover is screwed onto the ring provided above the card slot hole. At this time, the sampling tube as a whole is screwed together with the card slot through the screw connection. The present invention not only solves the problem that the sampling tube is not easy to cut into a slightly hard sand body, but also solves the problem that the sampling tube is not easy to be pulled out from the slightly hard sand body.

The utility model provides a coring device for collecting light release light samples, which relates to the technical field of soil sampling and comprises a sampler and a drill bit, a sampling end of the sampler is detachably connected with the drill bit, the other end of the sampler is detachably connected with a drill rod, the sampler comprises a sampling barrel and a sealing pipe, the sampling barrel is detachably connected with the drill bit, and a packaging opening is arranged on the sampling barrel. The sealing pipe is arranged in the sampling pipe from the packaging opening, the packaging opening is covered and connected with a cover plate, the opening end of the sealing pipe faces one side of the drill bit, the other end of the sealing pipe is internally and slidably connected with a sealing piece, and the sealing pipe is packaged in the sampling barrel, so that the sealing pipe is prevented from being in direct contact with surrounding soil, and the light pollution risk of a sample is reduced; the inner diameter of the sealing pipe is equal to the inner diameter of the drill bit, a sample drilled by the drill bit is completely loaded into the sampling barrel, after sampling is completed, the sealing pipe can be taken out of the sampling barrel, the sealing pipe can be conveniently transferred, the sealing pipe is black, real burying signals are reserved, and therefore accurate and reliable age data are obtained.

This invention discloses an optically stimulated luminescence (OSL) sample collection device and method for geological and mineral exploration, relating to the field of geological exploration sampling technology. It addresses the technical problems of slow single-sampling speed and complex processes in existing sampling devices. The OSL sample collection device includes a light-shielding shell, a feeding mechanism, a positioning mechanism, a pick-and-place mechanism, and a storage mechanism. The front of the light-shielding shell has a sampling port. The feeding mechanism is located inside the light-shielding shell and stores multiple unsampled sampling tubes. The positioning mechanism receives and aligns the sampling tubes with the sampling port. The pick-and-place mechanism pushes the sampling tubes through the sampling port for sampling, or retracts the sampled tubes back to the positioning mechanism. The storage mechanism receives and stores the sampled tubes. This invention enables sampling to be completed within the light-shielding shell, and the sample storage process is conducted in a light-shielding environment after sampling, avoiding the problem of premature fading of mineral particles due to natural light exposure.

According to the dysprosium and europium co-doped sodium fluoride magnesium light-release material and the co-precipitation preparation method thereof, the preparation raw materials are simple and safe, the batch uniformity is good, the preparation cost is low, the applicability is wide, and a powder sample shows the characteristics of the good light-release material; the OSL signal of the NaMgF3: Dy, Eu material has higher sensitivity than that of the commercially available Al2O3: C (InLight dosimeter) in different integration times; the degradation rate of the OSL response of the NaMgF3: Dy, Eu material within 15 days after irradiation is lower than 3.03%, the degradation rate of the OSL response of the NaMgF3: Dy, Eu material within 30 days after irradiation is lower than 10.79%, and the performance reaches the international advanced level. The NaMgF3: Dy, Eu photoluminescence material prepared by the invention can solve the problem that most of OSL materials decline seriously at present, obtains the OSL sensitivity which is competitive with that of a commercially available Al2O3: C material, and provides a solid guarantee for the accuracy and sensitivity of the material applied to nuclear radiation dose monitoring and traceability.