γ-rays is released from atomic decay cleavage. While it can be used to kill cancer cells and achieve the effect of cancer treatment in the medical, but it’s also likely to cause DNA breakage of intracellular organism and thus cause cell mutation, lacking of hematopoietic function, and cause cancer or other diseases, like a double-edged sword. γ-ray wave length is very short, but its penetrating force is extremely strong, carrying with high-energy.

 

Although γ-ray has a wide range of uses, but human beings will induce such as leukemia, thyroid disease, bone tumors and other malignant diseases if irradiating with a large dose of γ-rays for a long time. For pregnant women, it may cause gene mutation and chromosomal aberration, result congenital malformations, miscarriage, stillbirth, infertility and other diseases. If γ-rays exposure to the substances like metal utensils, soil or food for a long-term, it will make these non-radioactive substances induced radioactivity, and cause harm to humans. Therefore, it is inevitable to shield γ-ray.

 

The power of γ-ray mainly shows in the following two aspects: 1, The large energy of γ-ray. Because of its very short wavelength and high frequency, therefore γ-ray has a very large energy. High-energy γ ray does great damaging effects on the human bodies, and increased with the irradiating dose of γ-ray. 2, Strong penetrating force of γ-ray. When the human body is irradiating by γ-ray, γ-ray can enter the body's interior, and have an ionization effect with the cells, and erode the organic molecules in vivo. Therefore, we must find a safe and reliable protection material for shielding γ rays. However, tungsten alloy shielding material can satisfy the requirements with safety and reliance, and its high-density, high radiation absorption capacity has been widespread concerned.