Pure iridium specially used in aircraft spark plugs, used to make more scientific instruments, thermocouple, resistance wire, etc. For alloy, can strengthen other metal hardness. It with platinum alloy (10% and 10% of the Ir of Pt), due to the small expansion coefficient, commonly used to make international standard metric scale, kg of the original device in the world is made of platinum and iridium.
Iridium - 192 is an isotope of iridium, obtained by iridium - 191 after neutron radiation. It has a certain amount of radioactive, and wider use can be used to treat cancer and material inspection, etc.
Belong to 2 class source (high hazards), in the absence of protection, after being "iridium - 192" radiation exposure can lead to serious low red blood cells, white blood cells and platelets, and can severely damage bone marrow hematopoietic function, the structure of the cell's chromosomes affected by radiation and appear damage, the activity of telomerase also fell, skin and organs will immediately show the effect of damage, single cell injury prone to cancer, may also affect the genetic.
With the arrival of radioactive isotope iridium - 192 sources, the portable gamma detector, has been widely used in industry. Iridium - 192 gamma detector, moderate due to the gamma ray energy, high specific activity, radioactive sources in common under the thickness of the material has high detection sensitivity, because of the iridium - 192 gamma detector, a panoramic exposure can achieve 360 degrees, thus greatly improving the detection efficiency, save manpower and material resources and financial resources, is cannot be replaced by other NDT methods. For inspection instruments that contain iridium - 192 the use of the country has stated in its production and operation specification.
Because the damage is bigger, such as iridium - 192 of cancer cells in the treatment of cervical cancer and biliary diseases such as tumor has more significant effect, but temporarily cannot effect a radical cure these diseases.
No comments:
Post a Comment