Molecular relaxation processes in potassium carbonate (K 2 CO 3 ) are investigated using Raman-scattering spectroscopy. It is found that the first-order phase transition is temperature-expanded, and the pre-transition phenomena are observed in crystalline K 2 CO 3 . The paper gives theoretical grounds for pre-transition phenomena using the theoretical model of tunneling.

中文翻译：

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碳酸钾相变过程中的预转变现象

使用拉曼散射光谱研究碳酸钾 (K 2 CO 3 ) 中的分子弛豫过程。发现一级相变是温度膨胀的，在结晶K 2 CO 3 中观察到预相变现象。本文使用隧道效应的理论模型为预跃迁现象提供了理论依据。