The radiative lifetime of metastable CO (a³Π, v=0)
Gilijamse, Joop J. · Hoekstra, Steven · Meek, Samuel A. · Metsala, Markus · van de Meerakker, Sebastiaan Y. T. · Meijer, Gerard · Groenenboom, Gerrit C.
الأصل · EN
We present a combined experimental and theoretical study on the radiative lifetime of CO in the a³Π₁,₂, 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±0.03 ms for the a³Π₁, v=0, J=1 level. From spin-orbit coupling between the a³Π and the A¹Π state a 20% longer radiative lifetime of 3.16 ms is calculated for this level. It is concluded that coupling to other ¹Π states contributes to the observed phosphorescence rate of metastable CO.
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