拉曼位移：理解拉曼散射光频率变化

拉曼散射光频率和激发光频率之差称为'拉曼位移' (Raman shift)。

对于不同的物质，'拉曼位移' (ΔV) 不同。 对于同一物质，'拉曼位移' (ΔV) 不变，与入射光频率无关。

'拉曼位移' 取决于分子振动能级的变化。不同的化学键或基态有不同的振动方式，决定了其能级间的能量变化，因此，与之对应的'拉曼位移' 是特征的。

The frequency difference between Raman scattered light and excitation light is called the 'Raman shift'.

For different substances, ΔV varies. For the same substance, ΔV remains constant and is independent of the incident light frequency.

The Raman shift depends on the change in molecular vibrational energy levels. Different chemical bonds or ground states have different vibrational modes, which determine the energy changes between their levels. Therefore, the corresponding Raman shift is characteristic.