4 results about "Lanthanum bromide" patented technology

The invention relates to a multi-doped lanthanum bromide scintillation crystal and a preparation method thereof. The light-emitting non-uniformity of the head part and the tail part of the crystal is not more than 0.1%, the scintillation performance of the head part and the tail part of the crystal is consistent, the crystal quality is greatly improved, the application range of the crystal is widened, and the market prospect is wide. According to the preparation method disclosed by the embodiment of the invention, the preparation method of the multi-doped lanthanum bromide scintillation crystal in a secondary crystal growth mode by taking the crystal which is synthesized by a horizontal zone melting method and is free of surface and tail impurity layers as a raw material is provided for the first time, the operation is simple, the raw materials are easy to obtain, and the implementation of the whole preparation process is easy to realize. The problems of poor luminescence uniformity and the like caused by a component segregation phenomenon are avoided, the luminescence nonuniformity of the head part and the tail part of the crystal is improved to 0.07% from 1.12%, the energy resolution of the crystal is improved to 2.33% at 662 KeV from 2.94% at 662 KeV, and the quality of the crystal is greatly improved.

The application discloses a radioactive inert gas detection device, which comprises a gas chamber, a plastic scintillator detection assembly for detecting the total beta activity concentration of radioactive inert gas, and a lanthanum bromide crystal detection assembly for detecting the activity concentration of each radionuclide category in the radioactive inert gas. The plastic scintillator detection assembly comprises first, second and third plastic scintillator detectors and a first signal processing circuit board, and the bottom of the third plastic scintillator detector is provided with a lead shielding plate. The lanthanum bromide crystal detection assembly comprises first and second lanthanum bromide crystal detectors and a second signal processing circuit board, and the first lanthanum bromide crystal detector is provided with a lead shielding plate on the top thereof. The device can overcome environmental background interference, improve detection efficiency, and accurately measure the total beta activity concentration of radioactive inert gas in the exhaust pipeline and the activity concentration of each radionuclide category under the condition that the activity concentration of the radioactive inert gas is low.

The utility model relates to the technical field of rare earth material preparation, and discloses anhydrous lanthanum bromide preparation equipment, which comprises a fixed bottom table, a first fixed plate, a second fixed plate, a third fixed plate and a fourth fixed plate, the fixed bottom table is fixedly placed on a table top, the outer wall of one side of the fixed bottom table is fixedly provided with the first fixed plate, and the top of the first fixed plate is provided with a driving structure; the clamping rod is fixedly mounted at the top of the fixed bottom table, and a vacuum roasting bottle is mounted in the clamping rod in a clamping manner; the preparation structure comprises a preparation part and a screening part, the preparation part comprises a first preparation tank arranged at the top of the fixed bottom table, a fixed bed reactor is fixedly mounted in the first preparation tank, and a third cover plate is fixedly mounted at the top of the first preparation tank, so that the purposes of adding raw material gas and accelerating mixing are achieved; the mixed gas is purified, so that the preparation efficiency of the rare earth catalyst is improved, the use convenience of the device is improved, the gas is quickly mixed, and the operation steps of the device are simplified.

The utility model belongs to petroleum logging instrument technical field discloses a kind of lanthanum bromide crystal detectors special for element logging instrument. Including lanthanum bromide crystal;Iron fluorine Long protective sleeve, it is cut along the center axis and is equipped with conical opening, to tightly wrap lanthanum bromide crystal and leave out light receiving surface in the side towards photomultiplier;Crystal shell assembly, for accommodating and protecting iron fluorine Long protective sleeve and lanthanum bromide crystal;Multiplying tube shell, with crystal shell assembly can be detached connection;Photomultiplier, located in multiplying tube shell and with multiplying tube shell gap cooperation, and by elastic component, so that photomultiplier and lanthanum bromide crystal are always tightly contacted;Probe end cover, one end with multiplying tube shell detachable connection, the other end with electronic skeleton detachable connection;And electronic skeleton, for fixed circuit board, circuit board and photomultiplier electric connection. The utility model's lanthanum bromide crystal detector special for element logging instrument structure is compact, anti-seismic, easy to maintain and light collection efficiency is high.