7 results about "Scintillation counter" patented technology

The invention relates to a method for testing the tritium release rate of a tritium-containing waste package, and the method comprises the steps: guiding tritium-containing waste gas released by the tritium-containing waste package in an exhaust hood to be continuously input into an ionization chamber online monitoring system, and determining the initial tritium activity concentration; when the first threshold value is lower than the first threshold value, the tritium-containing waste gas flows into an initial bubbling sampler after passing through a refrigerating system to collect tritiated water, and target gas is obtained; enabling the target gas to circularly pass through the operation of the initial bubbling sampler, and replacing a new bubbling sampler every time a first preset time is reached; after a second preset time is reached, stopping the cyclic operation, and testing the target tritium activity concentration of liquid in the bubbling sampler which is replaced for multiple times and the current bubbling sampler by adopting a liquid scintillation counter; and calculating the tritium release rate based on the target tritium activity concentration. Target gas is discharged into the exhaust hood again, tritiated water absorption is carried out on tritium-containing waste gas multiple times, and the technical effects that tritiated water absorption is more complete due to multiple times of cyclic absorption, and the tritium release rate detection result is more accurate are achieved.

The application belongs to the technical field of radioactivity measurement, and relates to a data processing method for alpha and beta discrimination measurement of a liquid scintillation counter. α and tau β and calculates total error discrimination rate; step S2, confirming optimal discrimination parameters by using total error discrimination rate; step S3, evaluating alpha / beta discrimination effect by using minimum value of total error discrimination rate and half-peak width of the curve of total error discrimination rate and discrimination parameters; step S4, obtaining a scintillation signal pulse length distribution diagram, and using displacement and slope change of tau α curve and tau β curve to indicate change of scintillation signal pulse length and its probability distribution; and step S5, using trend change of the probability distribution diagram of scintillation signal pulse length to identify alpha signals of a sample. The application realizes comparison of alpha / beta discrimination measurement data under different conditions and comparison of change of scintillation signal pulse length and its probability distribution, and is helpful to optimization of alpha / beta discrimination measurement technology and improvement of reliability of measurement results.

The embodiment of the utility model discloses an ultra-low background liquid scintillation counter, which comprises three main photomultipliers which are radially arranged in the same horizontal plane at equal intervals, and a counting chamber for measurement is formed among the end parts of the three main photomultipliers; the number of the auxiliary photomultipliers is three, each auxiliary photomultiplier is arranged between two adjacent main photomultipliers at equal intervals, and the auxiliary photomultipliers and the main photomultipliers are arranged in a one-to-one correspondence mode and located in the same horizontal plane. Three through hole structures which are arranged at equal intervals are arranged on the side wall of the plastic scintillator at intervals and are used for adaptively arranging the three main photomultipliers, and three concave structures which are arranged at equal intervals are arranged on the side wall of the plastic scintillator at intervals and are used for adaptively arranging the end parts of the auxiliary photomultipliers; a lead shield; the photomultiplier has a shape and a structure matched with the main photomultiplier, the auxiliary photomultiplier and the plastic scintillator; a copper lining layer is adaptively arranged between the lead shielding body and the plastic scintillator; and the outer shell is adaptively arranged outside the lead shielding body.

1. The name of the design product: liquid scintillation counter. 2. The use of the design product: the design product is used in liquid scintillation counter measuring equipment. 3. The design points of the design product: the combination of shape and color. 4. The picture or photo that best shows the design points: perspective view. 5. The design for which protection is sought includes color. 6. Other circumstances that need to be explained: the material of the design product is mainly aluminum plate, and the surface is subjected to anodic oxidation and sand blasting treatment.

The embodiment of the invention discloses an alpha and beta particle discrimination method and system based on a liquid scintillation counter. The system comprises a signal detection module used for detecting alpha and beta particle electric signals; the signal shaping circuit module is connected with the signal detection module and is used for shaping the detected alpha and beta particle electric signals; a peak holding circuit module; the peak holding module is connected with the signal shaping circuit module and is used for carrying out amplification peak holding processing on the shaped alpha and beta particle electric signals; a signal discrimination circuit module; the signal processing circuit module is respectively connected with the signal shaping circuit module and the peak holding circuit module and is used for identifying electric signals useful for alpha and beta particles; an FPGA data processing module; and the signal discriminating circuit module is connected with the signal discriminating circuit module and is used for discriminating the square wave signals corresponding to the alpha particles and the beta particles.

The utility model belongs to the technical field of detection, and discloses a test box and a scintillation counter, and the test box comprises a box body, a door cover and a switch assembly. A placing opening is formed in the box body. The door cover is hinged to the end, provided with the containing opening, of the box body, and an elastic sealing piece is arranged on the door cover. The switch assembly comprises an elastic piece and a locking switch, one end of the elastic piece is connected to the door cover, and the other end is connected to the box body. The locking switch is arranged on the box body and has an opening state and a closing state which can be switched. The locking switch is in a closed state, the door cover is located at the position for blocking the placing opening, a gap is formed between the door cover and the placing opening, and the elastic sealing piece is extruded in the gap; and when the locking switch is in an open state, the door cover can be bounced off by the elastic piece. The test box provided by the utility model can be easily opened without a complicated structure, and the elastic sealing element can block the gap when the locking switch is in a closed state and in a switching process, so that the sealing effect is good, and the accuracy of a detection result is ensured.

A quartz crystal rod bonding device relates to the technical field of piezoelectric crystal, including the upper and lower split setting crystal rod detection positioning mechanism, mobile material table mechanism, the mobile material table mechanism includes material plate, material plate receiving plate, translation assembly, lifting assembly, the bottom of material plate receiving plate is connected with lifting assembly, lifting assembly is connected with translation assembly through translation plate, crystal rod detection positioning mechanism includes crystal rod holder assembly, crystal rod holder adjusting assembly, X-ray tube, X-ray tube adjusting assembly, scintillation counter, rotary encoder, X-ray tube is connected with X-ray tube adjusting assembly, and crystal rod holder assembly is connected with crystal rod holder adjusting assembly. The utility model discloses the crystal rod detection positioning mechanism of upper and lower split setting, mobile material table mechanism, adopts PLC control drive element, makes detection stable, improves detection accuracy and bonding qualification rate.