Keywords: 
• 原子核形变 /
• 反射不对称性 /
• 四面体对称性 /
• 反射不对称壳模型 /
• 在束伽马谱学

Abstract: Atomic nuclei are usually deformed except for a few magic nuclei which are spherical in shape. Modern nuclear experiments have discovered that some nuclei may have a pear-like shape, with reflection asymmetry. According to theory, other nuclei may also have a pyr-amid-like shape with tetrahedral symmetry, but this new nuclear symmetry has not yet been dis-covered experimentally. This paper aims to explain the formation mechanism of the tetrahedral symmetry as well as give a theoretical description based on the symmetry and symmetry-break-ing of a quantum strong interaction many-body system. The basic ways to search for tetrahedral nuclei and recent experimental developments are also discussed.