物理化学学报 >> 1987, Vol. 3 >> Issue (02): 197-203.doi: 10.3866/PKU.WHXB19870215

研究论文 上一篇    下一篇

SF6-UF6体系中六氟化铀的振动弛豫研究

蔡中厚; 侯惠奇; 秦启宗   

  1. 复旦大学激光化学研究室, 上海
  • 收稿日期:1985-09-03 修回日期:1986-08-10 发布日期:1987-04-15
  • 通讯作者: 秦启宗

VIBRATIONAL RELAXATION OF UFB IN SF6-UF6 SYSTEM

Cai Zhonghou; Hou Huiqi; Qin Qizong   

  1. Laser Chemistry Laboratory; Fudan Universiy; Shanghai
  • Received:1985-09-03 Revised:1986-08-10 Published:1987-04-15
  • Contact: Qin Qizong

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摘要： 本文以脉冲CO_2激光激发SF_6, 经碰撞再使UF_6分子激发, 通过测定振动受激UF_6的紫外吸收变化, 研究了六氟化铀分子的振动弛豫过程。对于2.0. Torr SF_6+2.0 Torr UF_6体系, 在220-320 nm范围内测定了UF_6的紫外吸收信号随时间的变化, 测得UF_6三类不同振动受激态分子间的V-V能量弛豫时间分别为6.8, 9.0和26 μs, 相应的V-T能量弛豫时间为42, 8和1 ms。此外, 还讨论了SF_6-UF_6体系中振动能量弛豫的机理。

Abstract: The vibrational energy transfer in SF_6-UF_6 system has been investigated using a pulsed TEA CO_2 laser for excitation of SF_6 and SF_6~* is employed as a sensitizer to excite UF_6 molecule. The transient changes in UV absorption of the vibration- ally excited UF_6 molecules in 220-320 nm region have been observed. For 2.0 Torr SF_6+2.0 Torr UF_6 system, three different kinds of vibrationally excited UF_6 have been found and their V-V intermolecular energy transfer times are 6.8, 9.0 and 26 μs, the V-T energy relaxation times are 42, 8.0 and 1 ms respectively. The vibrational energy transfer mechanism of SF_6-UF_6 system has been discussed.