Combination band spectroscopy of H3+

被引:22
作者
McCall, BJ
Oka, T
机构
[1] Univ Chicago, Dept Chem, Chicago, IL 60637 USA
[2] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA
[3] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
关键词
D O I
10.1063/1.1287142
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
Thirty rovibrational transitions of H-3(+) have been observed near 1.25 mu m using a tunable diode laser and a positive column discharge. In addition to the H-3(+) transitions, over 200 transitions between Rydberg states of H-2 were observed-these could be discriminated against by using a discharge dominated by He, which apparently collisionally quenches the Rydberg states of H-2 without affecting H-3(+). Twenty-eight of the H-3(+) transitions have been assigned to the nu(1) + 2 nu(2)(2)<-- 0 band, and provide experimentally determined energy levels for most of the levels up to J = 4 in the nu(1) + 2 nu(2)(2) state. The remaining two H-3(+) transitions have been assigned to the 2 nu(1) + nu(2)<-- 0 band. These bands represent a crucial test of ab initio calculations, as they reach higher vibrational levels of H-3(+) than any yet observed. We have compared our experimental results with recent variational calculations by several groups. (C) 2000 American Institute of Physics. [S0021-9606(00)02132-2].
引用
收藏
页码:3104 / 3110
页数:7
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