六氟化铀振动激发态的紫外吸收变化

本文以脉冲CO2激光激发SF6分子,经碰撞V-V传能产生UF6振动激发态,在波长220-330nm范围内研究其紫外吸收瞬时变化.在静态池的条件下,分别测定了脉冲CO2激发能量以及SF6和UF6的分压对紫外吸收变化的影响,曾对2.0TorrSF6和2.0TorrUF6混合气体在激光脉冲能量为160mJ时,振动受激的UF6分子的紫外吸收变化与波长的关系作了研究,发在在240,248,290和313nm处有明显的吸收变化的峰值,这可能系几种不同的高振动态SF6分子的吸收截面的变化所引起的.

The changes in UV absorbance of the vibrationally excited UF6 molecules

The transient changes in UV absorbances of the vibrationally excited UF6 at 220-330 nm were investigated. UF6 was excited by pulsed CO2 laser-pumped SF6 by a vibrational-vibrational energy transfer process. Under static conditions, the influences of CO2 laser fluence and SF6 and UF6 partial pressure upon the UV absorption changes were measured. For a 2.0 torr SF6 and 2.0 torr UF6 mixture and at laser pulsed energy of 160 ?10 mJ, the UV absorption spectrum of vibrationally excited UF6 showed existence of 4 absorption peaks at 240, 248, 290, and 313 nm, resp. It may be related to the UV absorption of higher vibrationally excited UF6.