INFRARED DOUBLE-RESONANCE OF SF6 WITH A TUNABLE DIODE-LASER

被引：62

作者：

JENSEN, CC ^{[1
]}

ANDERSON, TG ^{[1
]}

REISER, C ^{[1
]}

STEINFELD, JI ^{[1
]}

机构：

[1] MIT,DEPT CHEM,CAMBRIDGE,MA 02139

来源：

JOURNAL OF CHEMICAL PHYSICS | 1979年 / 71卷 / 09期

关键词：

D O I：

10.1063/1.438808

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Double resonance spectroscopy has been carried out on the v3 band of SF6 using a CO2 laser pump and a tunable diode laser probe. Power broadening of the pumped transition is observed, and a value for the transition moment μ12≈0.3×10-18 esucm is obtained. Off-resonant pumping of all symmetry components in the J manifold coupled to the pump laser is observed; this is attributed to field-induced mixing of nearly degenerate fine-structure levels in the vibrational ground state of the molecule. From the decay of the double resonance signals, we measure relaxation times Pτ = (24±3) nsecTorr for 2-level signals and Pτ = (43±11) nsec Torr for 3-level signals, corresponding to an effective cross section of 170 Å2. Excited-state transitions corresponding to 2v3←v3 with J = 32 are observed. The implications for multiple infrared photon excitation models are considered. © 1979 American Institute of Physics.

引用

页码：3648 / 3657

页数：10

共 70 条

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