Infrared Laser Spectroscopy

这项研究是实验物理化学计划的一部分，使用激光闪光光解技术产生自由基和瞬变物种，然后用红外光谱技术进行研究。这项研究将产生对燃烧和化学键重要的典型瞬变物种的结构和动力学的理解。时间分辨光谱技术将被用来研究C2H、C4H、乙烯基、亚乙烯基和烯丙基等小分子自由基的能级和动力学。在第二项研究中，我们将研究超声冷却后较大自由基的吸收光谱。冷却将降低温度和填充振动能级的数量，从而简化对这些物种的红外光谱的解释。

This research, part of the Experimental Physical Chemistry Program, uses the techniques of laser flash photolysis to produce radicals and transient species, which are then studied by infrared spectroscopic techniques. This research will produce an understanding of the structure and dynamics of prototypical transient species of importance to combustion and chemical bonding. Techniques of time-resolved spectroscopy will be utilized to study the energy levels and dynamics of small radicals such as C2H, C4H, vinyl, vinylidene and allyl. In a second study the absorption spectra of larger radicals will be studied after supersonic cooling. The cooling will reduce the temperature and the number of populated ro-vibrational levels, thereby simplifying the interpretation of the infrared spectra of these species.