The radiative lifetime of metastable CO ($a^3Π, v=0$)

Details The radiative lifetime of metastable CO ($a^3Π, v=0$) The radiative lifetime of metastable CO ($a^3Π, v=0$)

2007-10-11

arxiv.org/abs/0710.2240v2

Journal of Chemical Physics, 127, 221102 (2007)

Physics

Atomic Physics

replaced with final version, added journal reference

Scientific paper

10.1063/1.2813888

We present a combined experimental and theoretical study on the radiative lifetime of CO in the $a^3\Pi_{1,2}, v=0$ state. CO molecules in a beam are prepared in selected rotational levels of this metastable state, Stark-decelerated and electrostatically trapped. From the phosphorescence decay in the trap, the radiative lifetime is measured to be $2.63\pm0.03$ ms for the $a^3\Pi_1, v=0, J=1$ level. From spin-orbit coupling between the $a^3\Pi$ and the $A^1\Pi$ state a 20% longer radiative lifetime of 3.16 ms is calculated for this level. It is concluded that coupling to other $^1\Pi$ states contributes to the observed phosphorescence rate of metastable CO.

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