Collisional Processes in Atomic Vapors - Applications to Laser Spectroscopy (Physics)

建议研究碰撞过程在改变辐射场与原子相互作用中所起的作用。所使用的技术包括推导一个既考虑原子-场相互作用又考虑碰撞相互作用的输运方程。我们将综合考虑偏振效应和变速碰撞效应，得到四波混频中线形的综合理论。建议用能量守恒统一地解释压力诱导的额外共振，并将其应用于四波混频、量子拍子和光电离。将研究辐射场与囚禁原子的相互作用，包括瞬变响应、发射的辐射和碰撞过程对原子-场相互作用的作用。

It is proposed to investigate the role which collisional processes play in modifying the interaction of radiation fields with atoms. The techniques to be used involve the derivation of a transport-type equation which accounts for both the atom-field and collisional interactions. Work on the inclusion of polarization effects and velocity-changing collisional effects will be combined to obtain a comprehensive theory of line shapes in four-wave mixing. It is proposed to explain pressure-induced extra resonances in a unified manner using conservation of energy arguments, with applications to four wave mixing, quantum beats and photoionization. Studies will be undertaken of the interaction of radiation fields with trapped atoms, including transient responses, radiation emitted and the role of collisional processes on the atom-field interaction.