Method and device for identifying radionuclide Sr-89 and analyzing nuclear purity

A radionuclide, sr-89 technology, applied in the field of radionuclide Sr-89 identification and nuclear purity analysis, can solve the problems of small enterprises, high technical difficulty, complicated operation, etc., and achieve environmental improvement and technical requirements with little difficulty , The effect of reducing the amount of radioactive waste

Inactive Publication Date: 2012-10-17
NINGBO JUNAN PHARMA TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And compared with the standard strontium-89β-ray energy spectrum, this method has been used in scientific research and other departments. Due to the

Method used

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  • Method and device for identifying radionuclide Sr-89 and analyzing nuclear purity
  • Method and device for identifying radionuclide Sr-89 and analyzing nuclear purity
  • Method and device for identifying radionuclide Sr-89 and analyzing nuclear purity

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Embodiment 1

[0040] (1) Calibrate the sample activity and measure the detection efficiency of the gamma radiation source of the NaI gamma spectrometer;

[0041] (2) Choose a plastic container with a wall thickness of 8mm to shield the 1463Kev β-ray emitted by the sample, and set a lead tank with a wall thickness of 15mm outside the plastic container to shield the γ-ray of bremsstrahlung below 500Kev;

[0042] (3) Adjust the electronic parameters of the gamma spectrometer and measure the cumulative count, calculate the count rate, and calculate the gamma-ray emission rate with the detection efficiency obtained in step (1);

[0043] (4) The gamma ray energy obtained from the gamma peak position is 909Kev, the energy ratio obtained from the gamma ray emission rate and the sample activity is approximately equal to 0.01%, and the nuclide is determined to be Sr-89; other impurities measured by the gamma spectrometer The γ peak emitted by the nuclide is combined with the detection efficiency obta...

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Abstract

The invention relates to a method and a device for identifying a radionuclide Sr-89 and analyzing a nuclear purity. The method comprises the following steps of: (1), calibrating the activity of a sample and measuring the gamma radioactive source detection efficiency of a NaI gamma energy spectrometer; (3), calculating to obtain the emissivity of a gamma ray; (4), acquiring that the energy of the gamma ray is 909 Kev by the position of a gamma peak, obtaining that an energy specific value is approximately equal to 0.01% by the emissivity of the gamma ray and the activity of the sample, and determining that a nuclide is the Sr-89; and calculating to acquire the purity. The device comprises a lead chamber, a NaI crystal and photomultiplier, a lead tank, a plastic container, a penicillin bottle and a plastic cup. By using the method and the device, the strontium-89 nuclide and the nuclear purity are quickly and highly sensitively identified; by using the method and the device, the difficulty of a technical requirement on an operator is low; compared with the utilization of scintillating liquid, the amount of a radioactive waste can be reduced to improve the environment; meanwhile, the investment through which an enterprise needs to establish new equipment and an instrument is reduced; and the method and the device have a favorable application prospect.

Description

technical field [0001] The invention belongs to the field of Sr-89 identification and nuclear purity analysis, in particular to a method and device for identification and nuclear purity analysis of radionuclide Sr-89. Background technique [0002] The radionuclide strontium-89 directly emits the maximum energy 1463Kev β-ray with a half-life of 50.55 days, and another about 0.01% chance to decay into strontium-89m, release high-energy γ-rays (energy 909Kev), and finally decay into a stable nuclide ytterbium- 89. [0003] Made of the artificial radioactive isotope strontium-89 ( 89 Sr) made of strontium chloride (strontium-89) injection has been widely used at home and abroad to treat cancer patients with bone metastases, relieve their pain, and improve their quality of life. The mechanism is that strontium chloride [ 89 Sr] solution is injected into the patient's body. Since strontium is a bone-loving element, the solution is concentrated in the bone metastases of cancer ti...

Claims

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Application Information

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IPC IPC(8): G01T1/24G01T1/36
Inventor 姚志铨
Owner NINGBO JUNAN PHARMA TECH
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